Chemical liquid injection system

• US 7,887,513 B2
• Filed: 11/10/2005
• Issued: 02/15/2011
• Est. Priority Date: 11/11/2004
• Status: Expired due to Fees

• Current Assignee: Nemoto Kyorindo Company Limited
• Original Assignee: Nemoto Kyorindo Company Limited
• Inventors: Nemoto, Shigeru, Sakakibara, Masahiro, Ono, Seiichi
• Primary Examiner(s): Lucchesi; Nicholas D
• Assistant Examiner(s): STOHR, LEAH C
• Application Number:
  US11/719,089
• Publication Number:
  US 20080125713A1
• Time in Patent Office: 1,923 Days
• Field of Search: 604/131, 604/152, 604/154, 604/111, 604/232
• US Class Current: 604/154
• CPC Class Codes: A61B 6/4494 Means for identifying the diagnostic device
• CPC Class Codes: A61M 2205/14 Detection of the presence or absence of a tube, a connector or a container in an apparatus
• CPC Class Codes: A61M 2205/276 preventing unwanted use
• CPC Class Codes: A61M 2205/6018 providing set-up signals for the apparatus configuration
• CPC Class Codes: A61M 2205/6054 Magnetic identification systems
• CPC Class Codes: A61M 5/1456 with a replaceable reservoir comprising a piston rod to be moved into the reservoir, e.g. the piston rod is part of the removable reservoir

Abstract

A chemical liquid injection system which a piston driving mechanism is driven only when a cylinder holding mechanism appropriately holds liquid syringes of various sizes through a cylinder adapter and such manner. When the liquid syringe 200S of a size other than the maximum size is appropriately held by the cylinder holding mechanism 120, RFID chip 230 is located on the side at the rear of metallic cylinder holding mechanism 120. A pair of resonance antennas are disposed on the left and right of the RFID chip, and an RFID reader 131 is disposed below the resonance antennas. When the liquid syringe 200S is appropriately held by the cylinder holding mechanism 120, RFID chip 230 wirelessly communicates with RFID reader 131 favorably, and the piston driving mechanism can be operated only in this state.

Claims

1. A chemical liquid injection system comprising at least:

a liquid syringe wherein a piston member is slidably inserted into a cylindrical member of a cylindrical shape having an annular cylinder flange formed on an outer circumference of a trailing end from the back thereof, and

a chemical liquid injector for injecting a liquid into a patient by relatively moving the cylinder member and the piston member of the liquid syringe mounted interchangeably,

wherein the liquid syringe includes an RFID chip put on an outer circumference surface of the cylinder member, the RFID chip including a chip antenna in a predetermined plane shape connected to a circuit chip to wirelessly transmit recorded data,

the chemical liquid injector includes a cylinder holding mechanism for individually holding a left portion and a right portion of the cylinder flange of the liquid syringe inserted from above, a piston driving mechanism for at least pressing the piston member into the held cylinder member, an RFID reader including a reader antenna in a predetermined plane shape connected to a communication circuit to wirelessly receive the recorded data from the RFID chip, a pair of resonance antennas in a predetermined plane shape, an interfering conductor in a predetermined plane shape longer and larger than the reader antenna, and operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

the RFID chip, in the liquid syringe, is disposed such that substantially the center of the RFID chip is located on the left or right of the cylinder member when the liquid syringe is held by the cylinder holding mechanism in a particular orientation in rotation about the axis, and

the reader antenna, in the chemical liquid injector, is disposed in a plane direction substantially in parallel with the chip antenna and below the piston member in the state in which the cylinder member is held by the cylinder holding mechanism in an orientation rotated by a right angle from the particular orientation, the paired resonance antennas is disposed in a plane direction substantially in parallel with the chip antenna and to the left and right of the piston member in the state in which the cylinder member is held by the cylinder holding mechanism in the particular orientation, and the interfering conductor is disposed in a plane direction substantially in parallel with the chip antenna and immediately below the RFID chip in the state in which the cylinder member is held by the cylinder holding mechanism in an orientation rotated by a right angle from the particular orientation.

6. The chemical liquid injection system according to claim 1, wherein the paired resonance antennas are spaced from each other by a distance of substantially one-half wavelength in the wireless communication.

7. The chemical liquid injection system according to claim 1, wherein the paired resonance antennas are spaced from each other by a distance of substantially an integral multiple of a wavelength in the wireless communication.

8. The chemical liquid injection system according to claim 6, wherein the RFID chip wirelessly communicates with the RFID reader at a frequency of “

2.45 (GHz)”

, and

the paired resonance antennas are spaced from each other by a distance of approximately “

60 (mm)”

.

40. The chemical liquid injection system according to claim 1, wherein a leading end portion of the piston member is located at a trailing end portion of the cylinder member in the liquid syringe, and the RFID chip is put on the outer circumference surface of the trailing end portion of the cylinder member at a position overlapping the leading end portion of the piston member.

45. The chemical liquid injection system according to claim 1, wherein the RFID chip has various types of data recorded thereon as the recorded data, and

the chemical liquid injector comprises data display means for outputting as display at least some of the various types of data wirelessly received from the RFID chip.

50. The chemical liquid injection system according to claim 1, wherein the operation control means returns the piston driving mechanism to an initial position when completion of injection operation is detected and then detection of the RFID chip by the RFID reader is ended.

55. The chemical liquid injection system according to claim 1, wherein the operation control means comprises data holding means for holding the various types of data wirelessly received from the RFID chip and injection control means for controlling operation of the piston driving mechanism in accordance with at least some of the various types of held data.

56. The chemical liquid injection system according to claim 55, wherein the liquid syringe is of a pre-filled type which is shipped with the liquid syringe filled with a contrast medium as the liquid to be injected into a patient whose diagnostic image is taken by a diagnostic imaging apparatus, the RFID chip of the liquid syringe having a variable pattern set thereon with which an injection rate of the contrast medium is changed with time, and

the operation control means changes an operation rate of the piston driving mechanism in accordance with the variable pattern.

65. The chemical liquid injection system according to claim 1, wherein the operation control means comprises check storing means for storing a predetermined check condition as data, data comparing means for comparing the check condition stored as data with the various types of data wirelessly received from the RFID chip, and alarm outputting means for outputting and notifying a check alarm in accordance with the comparison result.

70. The chemical liquid injection system according to claim 1, wherein the RFID chip has at least a production number of the liquid syringe for each item set thereon, and

the operation control means includes data accumulating means for storing data of the production number of the liquid syringe mounted and used to perform injection operation, data comparing means for comparing the stored production number with the new production number, and alarm outputting means for outputting and notifying a check alarm when the compared production numbers match.

75. The chemical liquid injection system according to claim 1, wherein the RFID chip is put on the liquid syringe to record at least the fact that that liquid syringe is once used, and

the operation control means includes data recording means for recording, on the RFID chip of the liquid syringe, data of the fact that that liquid syringe has been mounted and the liquid thereof has been injected, and alarm outputting means for outputting and notifying a check alarm when that data is wirelessly received from the RFID chip of the liquid syringe.

80. A liquid syringe of the chemical liquid injection system according to claim 1,

wherein the RFID chip is put on the liquid syringe disposed such that substantially the center of the RFID chip is located on the left or right of the outer circumference of the cylinder member when the liquid syringe is held by the cylinder holding mechanism in a particular orientation in rotation about the axis.

2. A chemical liquid injection system comprising at least:

liquid syringes of various sizes, each of the syringes include a piston member slidably inserted into a cylinder member of a cylindrical shape having an annular cylinder flange formed on an outer circumference of a trailing end from the back thereof,

a cylinder adapter of at least one type provided for each of the liquid syringes of sizes other than a maximum size, and

a chemical liquid injector for injecting a liquid into a patient by relatively moving the cylinder member and the piston member of the liquid syringe of the maximum size mounted directly and the liquid syringe of a size other than the maximum size mounted with the cylinder adapter intervening between the chemical liquid injector and the liquid syringe,

wherein the liquid syringe includes an RFID chip put on an outer circumference surface of the cylinder member, the RFID chip including a chip antenna in a predetermined plane shape connected to a circuit chip to wirelessly transmit recorded data,

the chemical liquid injector includes a cylinder holding mechanism for individually holding a left portion and a right portion of the cylinder flange of the liquid syringe of the maximum size inserted from above with a pair of metallic flange holding members and for holding the cylinder adapter inserted from above, a piston driving mechanism for at least pressing the piston member into the cylinder member of the held liquid syringe, an RFID reader including a reader antenna in a predetermined plane shape connected to a communication circuit to wirelessly receive the recorded data from the RFID chip, a pair of resonance antennas in a predetermined plane shape, an auxiliary antenna in a predetermined plane shape shorter and smaller than the reader antenna, and operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

the RFID chip, in the liquid syringe of the maximum size, is disposed such that substantially the center of the RFID chip is located at the top or bottom of the cylinder member when that liquid syringe is held by the cylinder holding mechanism in a particular orientation in rotation about the axis,

the RFID chip, in the liquid syringe of a size other than the maximum size, is disposed such that substantially the center of the RFID chip is located on the left or right of the cylinder member when that liquid syringe is held by the cylinder adapter in the cylinder holding mechanism in the particular orientation,

the reader antenna is disposed in a plane direction substantially in parallel with the chip antenna and below the piston member in the state in which the liquid syringe of the maximum size is held by the cylinder holding mechanism in the particular orientation, the paired resonance antennas are disposed in a plane direction substantially in parallel with the chip antenna and to the left and right of the piston member in the state in which the liquid syringe of the maximum size is held by the cylinder holding mechanism in an orientation rotated by a right angle from the particular orientation, and the auxiliary antenna is disposed in a plane direction substantially in parallel with the chip antenna and immediately below the RFID chip in the state in which the liquid syringe of the maximum size is held by the cylinder holding mechanism in the particular orientation, in the chemical liquid injector,

the cylinder adapter is formed of a material which does not prevent the wireless communication, holds at least a left portion and a right portion of the cylinder flange of the liquid syringe inserted from above, and includes an interfering conductor longer and larger than the reader antenna at a position overlapping the auxiliary antenna in the state in which the cylinder adapter is held by the cylinder holding mechanism, and

the chip antenna is located at the rear of the flange holding members in the state in which the liquid syringe of a size other than the maximum size is held by the cylinder adapter put in the cylinder holding mechanism.

25. A liquid syringe of various sizes in the chemical liquid injection system according to claim 2,

wherein the RFID chip is put on the liquid syringe of the maximum size disposed such that substantially the center of the RFID chip is located at the top or bottom of the outer circumference of the cylinder member when the liquid syringe of the maximum size is held by the cylinder holding mechanism in a particular orientation in rotation about the axis, and

the RFID chip is put on the liquid syringe of a size other than the maximum size disposed such that substantially the center of the RFID chip is located on the left or right of the outer circumference of the cylinder member when the liquid syringe of the size other than maximum size is held by the cylinder adapter in the cylinder holding mechanism in the particular orientation.

26. A cylinder adapter in the chemical liquid injection system according to claim 2,

wherein the cylinder adapter is formed of a material which does not prevent the wireless communication, individually holds the left portion and the right portion of the cylinder flange of the liquid syringe inserted from above, and includes an interfering conductor longer and larger than the reader antenna at a position overlapping the auxiliary antenna when the cylinder adapter is held by the cylinder holding mechanism.

28. The chemical liquid injection system according to claim 2, wherein the paired resonance antennas are spaced from each other by a distance of substantially one-half wavelength in the wireless communication.

29. The chemical liquid injection system according to claim 28, wherein the RFID chip wirelessly communicates with the RFID reader at a frequency of “

2.45 (GHz)”

, and

the paired resonance antennas are spaced from each other by a distance of approximately “

60 (mm)”

.

34. The chemical liquid injection system according to claim 2, wherein the paired resonance antennas are spaced from each other by a distance of substantially an integral multiple of a wavelength in the wireless communication.

41. The chemical liquid injection system according to claim 2, wherein a leading end portion of the piston member is located at a trailing end portion of the cylinder member in the liquid syringe, and the RFID chip is put on the outer circumference surface of the trailing end portion of the cylinder member at a position overlapping the leading end portion of the piston member.

46. The chemical liquid injection system according to claim 2, wherein the RFID chip has various types of data recorded thereon as the recorded data, and

the chemical liquid injector comprises data display means for outputting as display at least some of the various types of data wirelessly received from the RFID chip.

51. The chemical liquid injection system according to claim 2, wherein the operation control means returns the piston driving mechanism to an initial position when completion of injection operation is detected and then detection of the RFID chip by the RFID reader is ended.

57. The chemical liquid injection system according to claim 2, wherein the operation control means comprises data holding means for holding the various types of data wirelessly received from the RFID chip and injection control means for controlling operation of the piston driving mechanism in accordance with at least some of the various types of held data.

58. The chemical liquid injection system according to claim 57, wherein the liquid syringe is of a pre-filled type which is shipped with the liquid syringe filled with a contrast medium as the liquid to be injected into a patient whose diagnostic image is taken by a diagnostic imaging apparatus, the RFID chip of the liquid syringe having a variable pattern set thereon with which an injection rate of the contrast medium is changed with time, and

the operation control means changes an operation rate of the piston driving mechanism in accordance with the variable pattern.

66. The chemical liquid injection system according to claim 2, wherein the operation control means comprises check storing means for storing a predetermined check condition as data, data comparing means for comparing the check condition stored as data with the various types of data wirelessly received from the RFID chip, and alarm outputting means for outputting and notifying a check alarm in accordance with the comparison result.

71. The chemical liquid injection system according to claim 2, wherein the RFID chip has at least a production number of the liquid syringe for each item set thereon, and

the operation control means includes data accumulating means for storing data of the production number of the liquid syringe mounted and used to perform injection operation, data comparing means for comparing the stored production number with the new production number, and alarm outputting means for outputting and notifying a check alarm when the compared production numbers match.

76. The chemical liquid injection system according to claim 2, wherein the RFID chip is put on the liquid syringe to record at least the fact that that liquid syringe is once used, and

the operation control means includes data recording means for recording, on the RFID chip of the liquid syringe, data of the fact that that liquid syringe has been mounted and the liquid thereof has been injected, and alarm outputting means for outputting and notifying a check alarm when that data is wirelessly received from the RFID chip of the liquid syringe.

3. A chemical liquid injection system comprising at least:

a liquid syringe wherein a piston member is slidably inserted into a cylindrical member of a cylindrical shape having an annular cylinder flange formed on an outer circumference of a trailing end from the back thereof, and

a chemical liquid injector for injecting a liquid into a patient by relatively moving the cylinder member and the piston member of the liquid syringe mounted interchangeably,

wherein the liquid syringe includes an RFID chip wound and put on an outer circumference surface of the cylinder member, the RFID chip including a chip antenna in a predetermined elongated shape connected to a circuit chip to wirelessly transmit recorded data,

the chemical liquid injector includes a cylinder holding mechanism for individually holding a left portion and a right portion of the cylinder flange of the liquid syringe inserted from above, a piston driving mechanism for at least pressing the piston member into the held cylinder member, an RFID reader including a reader antenna in a predetermined elongated shape connected to a communication circuit to wirelessly receive the recorded data from the RFID chip, a pair of resonance antennas in a predetermined elongated shape, an interfering conductor longer and larger than the reader antenna, and operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

RFID chip, in the liquid syringe, is disposed such that substantially the center of the RFID chip is located on the left or right of the cylinder member in the state in which the liquid syringe is held by the cylinder holding mechanism in a particular orientation in rotation about the axis, and

the reader antenna is disposed in a longitudinal direction substantially in parallel with the chip antenna and below the piston member in the state in which the cylinder member is held by the cylinder holding mechanism in an orientation rotated by a right angle from the particular orientation, the paired resonance antennas are disposed in a longitudinal direction substantially in parallel with the chip antenna and en to the left and right of the piston member in the state in which the cylinder member is held by the cylinder holding mechanism in the particular orientation, and the interfering conductor is disposed in a longitudinal direction substantially in parallel with the chip antenna and immediately below the RFID chip in the state in which the cylinder member is held by the cylinder holding mechanism in an orientation rotated by a right angle from the particular orientation, the chemical liquid injector.

5. The chemical liquid injection system according to claim 3, wherein the resonance antenna comprises a body portion in a predetermined elongated shape with its longitudinal direction substantially in parallel with the chip antenna in the state in which the liquid syringe of a size other than the maximum size is held by the cylinder holding mechanism in the particular orientation, and an inclined portion in a predetermined elongated shape inclined such that its upper end is located at the rear of its lower end.

30. The chemical liquid injection system according to claim 3, wherein the paired resonance antennas are spaced from each other by a distance of substantially one-half wavelength in the wireless communication.

31. The chemical liquid injection system according to claim 30, wherein the RFID chip wirelessly communicates with the RFID reader at a frequency of “

2.45 (GHz)”

, and

the paired resonance antennas are spaced from each other by a distance of approximately “

60 (mm)”

.

35. The chemical liquid injection system according to claim 3, wherein the paired resonance antennas are spaced from each other by a distance of substantially an integral multiple of a wavelength in the wireless communication.

43. The chemical liquid injection system according to claim 3, wherein a leading end portion of the piston member is located at a trailing end portion of the cylinder member in the liquid syringe, and the RFID chip is put on the outer circumference surface of the trailing end portion of the cylinder member at a position overlapping the leading end portion of the piston member.

48. The chemical liquid injection system according to claim 3, wherein the RFID chip has various types of data recorded thereon as the recorded data, and

the chemical liquid injector comprises data display means for outputting as display at least some of the various types of data wirelessly received from the RFID chip.

53. The chemical liquid injection system according to claim 3, wherein the operation control means returns the piston driving mechanism to an initial position when completion of injection operation is detected and then detection of the RFID chip by the RFID reader is ended.

61. The chemical liquid injection system according to claim 3, wherein the operation control means comprises data holding means for holding the various types of data wirelessly received from the RFID chip and injection control means for controlling operation of the piston driving mechanism in accordance with at least some of the various types of held data.

62. The chemical liquid injection system according to claim 61, wherein the liquid syringe is of a pre-filled type which is shipped with the liquid syringe filled with a contrast medium as the liquid to be injected into a patient whose diagnostic image is taken by a diagnostic imaging apparatus, the RFID chip of the liquid syringe having a variable pattern set thereon with which an injection rate of the contrast medium is changed with time, and

the operation control means changes an operation rate of the piston driving mechanism in accordance with the variable pattern.

68. The chemical liquid injection system according to claim 3, wherein the operation control means comprises check storing means for storing a predetermined check condition as data, data comparing means for comparing the check condition stored as data with the various types of data wirelessly received from the RFID chip, and alarm outputting means for outputting and notifying a check alarm in accordance with the comparison result.

73. The chemical liquid injection system according to claim 3, wherein the RFID chip has at least a production number of the liquid syringe for each item set thereon, and

the operation control means includes data accumulating means for storing data of the production number of the liquid syringe mounted and used to perform injection operation, data comparing means for comparing the stored production number with the new production number, and alarm outputting means for outputting and notifying a check alarm when the compared production numbers match.

78. The chemical liquid injection system according to claim 3, wherein the RFID chip is put on the liquid syringe to record at least the fact that that liquid syringe is once used, and

the operation control means includes data recording means for recording, on the RFID chip of the liquid syringe, data of the fact that that liquid syringe has been mounted and the liquid thereof has been injected, and alarm outputting means for outputting and notifying a check alarm when that data is wirelessly received from the RFID chip of the liquid syringe.

82. A liquid syringe of the chemical liquid injection system according to claim 3,

wherein the RFID chip is put on the liquid syringe disposed such that substantially the center of the RFID chip is located on the left or right of the outer circumference of the cylinder member when the liquid syringe is held by the cylinder holding mechanism in a particular orientation in rotation about the axis.

4. A chemical liquid injection system comprising at least:

liquid syringes of various sizes, each of the syringes include a piston member slidably inserted into a cylinder member of a cylindrical shape having an annular cylinder flange formed on an outer circumference of a trailing end from the back thereof,

a cylinder adapter of at least one type provided for each of the liquid syringes of sizes other than a maximum size, and

a chemical liquid injector for injecting a liquid into a patient by relatively moving the cylinder member and the piston member of the liquid syringe of the maximum size mounted directly and the liquid syringe of a size other than the maximum size mounted with the cylinder adapter intervening between the chemical liquid injector and the liquid syringe,

wherein the liquid syringe includes an RFID chip wound and put on an outer circumference surface of the cylinder member, the RFID chip including a chip antenna in a predetermined elongated shape connected to a circuit chip to wirelessly transmit recorded data,

the chemical liquid injector includes a cylinder holding mechanism for individually holding a left portion and a right portion of the cylinder flange of the liquid syringe of the maximum size inserted from above with a pair of metallic flange holding members and for holding the cylinder adapter inserted from above, a piston driving mechanism for at least pressing the piston member into the cylinder member of the held liquid syringe, an RFID reader including a reader antenna in a predetermined elongated shape connected to a communication circuit to wirelessly receive the recorded data from the RFID chip, a pair of resonance antennas in a predetermined elongated shape, an auxiliary antenna in a predetermined elongated shape shorter and smaller than the reader antenna, and operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

the RFID chip, in the liquid syringe of the maximum size, is disposed such that substantially the center of the RFID chip is located at the top or bottom of the cylinder member when that liquid syringe is held by the cylinder holding mechanism in a particular orientation in rotation about the axis,

the RFID chip, in the liquid syringe of a size other than the maximum size, is disposed such that substantially the center of the RFID chip is located on the left or right of the cylinder member when that liquid syringe is held by the cylinder adapter in the cylinder holding mechanism in the particular orientation,

the reader antenna is disposed in a longitudinal direction substantially in parallel with the chip antenna and below the piston member in the state in which the liquid syringe of the maximum size is held by the cylinder holding mechanism in the particular orientation, the paired resonance antennas are disposed in a longitudinal direction substantially in parallel with the chip antenna and to the left and right of the piston member in the state in which the liquid syringe of the maximum size is held by the cylinder holding mechanism in an orientation rotated by a right angle from the particular orientation, and the auxiliary antenna is disposed in a longitudinal direction substantially in parallel with the chip antenna and immediately below the RFID chip in the state in which the liquid syringe of the maximum size is held by the cylinder holding mechanism in the particular orientation, in the chemical liquid injector,

the cylinder adapter is formed of a material which does not prevent the wireless communication, holds at least a left portion and a right portion of the cylinder flange of the liquid syringe inserted from above, and includes an interfering conductor longer and larger than the reader antenna at a position overlapping the auxiliary antenna in the state in which the cylinder adapter is held by the cylinder holding mechanism, and

the chip antenna is located at the rear of the flange holding members in the state in which the liquid syringe of a size other than the maximum size is held by the cylinder adapter put in the cylinder holding mechanism.

27. The chemical liquid injection system according to claim 4, wherein the resonance antenna comprises a body portion in a predetermined elongated shape with its longitudinal direction substantially in parallel with the chip antenna in the state in which the liquid syringe of a size other than the maximum size is held by the cylinder holding mechanism in the particular orientation, and an inclined portion in a predetermined elongated shape inclined such that its upper end is located at the rear of its lower end.

32. The chemical liquid injection system according to claim 4, wherein the paired resonance antennas are spaced from each other by a distance of substantially one-half wavelength in the wireless communication.

33. The chemical liquid injection system according to claim 32, wherein the RFID chip wirelessly communicates with the RFID reader at a frequency of “

2.45 (GHz)”

, and

the paired resonance antennas are spaced from each other by a distance of approximately “

60 (mm)”

.

36. The chemical liquid injection system according to claim 4, wherein the paired resonance antennas are spaced from each other by a distance of substantially an integral multiple of a wavelength in the wireless communication.

44. The chemical liquid injection system according to claim 4, wherein a leading end portion of the piston member is located at a trailing end portion of the cylinder member in the liquid syringe, and the RFID chip is put on the outer circumference surface of the trailing end portion of the cylinder member at a position overlapping the leading end portion of the piston member.

49. The chemical liquid injection system according to claim 4, wherein the RFID chip has various types of data recorded thereon as the recorded data, and

the chemical liquid injector comprises data display means for outputting as display at least some of the various types of data wirelessly received from the RFID chip.

54. The chemical liquid injection system according to claim 4, wherein the operation control means returns the piston driving mechanism to an initial position when completion of injection operation is detected and then detection of the RFID chip by the RFID reader is ended.

63. The chemical liquid injection system according to claim 4, wherein the operation control means comprises data holding means for holding the various types of data wirelessly received from the RFID chip and injection control means for controlling operation of the piston driving mechanism in accordance with at least some of the various types of held data.

64. The chemical liquid injection system according to claim 63, wherein the liquid syringe is of a pre-filled type which is shipped with the liquid syringe filled with a contrast medium as the liquid to be injected into a patient whose diagnostic image is taken by a diagnostic imaging apparatus, the RFID chip of the liquid syringe having a variable pattern set thereon with which an injection rate of the contrast medium is changed with time, and

the operation control means changes an operation rate of the piston driving mechanism in accordance with the variable pattern.

69. The chemical liquid injection system according to claim 4, wherein the operation control means comprises check storing means for storing a predetermined check condition as data, data comparing means for comparing the check condition stored as data with the various types of data wirelessly received from the RFID chip, and alarm outputting means for outputting and notifying a check alarm in accordance with the comparison result.

74. The chemical liquid injection system according to claim 4, wherein the RFID chip has at least a production number of the liquid syringe for each item set thereon, and

the operation control means includes data accumulating means for storing data of the production number of the liquid syringe mounted and used to perform injection operation, data comparing means for comparing the stored production number with the new production number, and alarm outputting means for outputting and notifying a check alarm when the compared production numbers match.

79. The chemical liquid injection system according to claim 4, wherein the RFID chip is put on the liquid syringe to record at least the fact that that liquid syringe is once used, and

the operation control means includes data recording means for recording, on the RFID chip of the liquid syringe, data of the fact that that liquid syringe has been mounted and the liquid thereof has been injected, and alarm outputting means for outputting and notifying a check alarm when that data is wirelessly received from the RFID chip of the liquid syringe.

83. A liquid syringe of various sizes in the chemical liquid injection system according to claim 4,

wherein the RFID chip is put on the liquid syringe of the maximum size disposed such that substantially the center of the RFID chip is located at the top or bottom of the outer circumference of the cylinder member when the liquid syringe of the maximum size is held by the cylinder holding mechanism in a particular orientation in rotation about the axis, and

the RFID chip is put on the liquid syringe of a size other than the maximum size disposed such that substantially the center of the RFID chip is located on the left or right of the outer circumference of the cylinder member when the liquid syringe of the size other than maximum size is held by the cylinder adapter in the cylinder holding mechanism in the particular orientation.

84. A cylinder adapter in the chemical liquid injection system according to claim 4,

wherein the cylinder adapter is formed of a material which does not prevent the wireless communication, individually holds the left portion and the right portion of the cylinder flange of the liquid syringe inserted from above, and includes an interfering conductor longer and larger than the reader antenna at a position overlapping the auxiliary antenna when the cylinder adapter is held by the cylinder holding mechanism.

9. A chemical liquid injection system comprising:

a liquid syringe wherein a piston member is slidably inserted into a cylindrical member of a cylindrical shape having an annular cylinder flange formed on an outer circumference of a trailing end from the back thereof, and

a chemical liquid injector for injecting a liquid into a patient by relatively moving the cylinder member and the piston member of the liquid syringe mounted interchangeably,

wherein the liquid syringe includes an RFID (Radio Frequency Identification) chip put on an outer circumference surface of the cylinder member, the RFID chip including a circuit chip connected to a chip antenna in a predetermined plane shape to wirelessly transmit recorded data,

the chemical liquid injector includes a cylinder holding mechanism for individually holding a left portion and a right portion of the cylinder flange of the liquid syringe inserted from above, a piston driving mechanism for at least pressing the piston member into the held cylinder member, an RFID reader including a reader antenna in a predetermined plane shape connected to a communication circuit to wirelessly receive the recorded data from the RFID chip, a resonance antenna in a predetermined plane shape, and operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

the RFID chip, in the liquid syringe, is disposed such that substantially the center of the RFID chip is located on the left or right of the cylinder member when the liquid syringe is held by the cylinder holding mechanism in a particular orientation in rotation about the axis, and

the reader antenna is disposed in a plane direction substantially in parallel with the chip antenna and to one of the left and right of the piston member on the chemical liquid injector and the resonance antenna is disposed to the other of the left and right in the state in which the cylinder member is held by the cylinder holding mechanism in the particular orientation, in the chemical liquid injector, and

wherein the reader antenna is spaced from the resonance antenna by a distance of substantially one-half wavelength in the wireless communication.

11. The chemical liquid injection system according to claim 9, wherein the RFID chip wirelessly communicates with the RFID reader at a frequency of “

2.45 (GHz)”

, and

the reader antenna is spaced from the resonance antenna by a distance of approximately “

60 (mm)”

.

10. A chemical liquid injection system comprising:

a liquid syringe wherein a piston member is slidably inserted into a cylindrical member of a cylindrical shape having an annular cylinder flange formed on an outer circumference of a trailing end from the back thereof, and

a chemical liquid injector for injecting a liquid into a patient by relatively moving the cylinder member and the piston member of the liquid syringe mounted interchangeably,

wherein the liquid syringe includes an RFID (Radio Frequency Identification) chip put on an outer circumference surface of the cylinder member, the RFID chip including a circuit chip connected to a chip antenna in a predetermined plane shape to wirelessly transmit recorded data,

the chemical liquid injector includes a cylinder holding mechanism for individually holding a left portion and a right portion of the cylinder flange of the liquid syringe inserted from above, a piston driving mechanism for at least pressing the piston member into the held cylinder member, an RFID reader including a reader antenna in a predetermined plane shape connected to a communication circuit to wirelessly receive the recorded data from the RFID chip, a resonance antenna in a predetermined plane shape, and operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

the RFID chip, in the liquid syringe, is disposed such that substantially the center of the RFID chip is located on the left or right of the cylinder member when the liquid syringe is held by the cylinder holding mechanism in a particular orientation in rotation about the axis, and

the reader antenna is disposed in a plane direction substantially in parallel with the chip antenna and to one of the left and right of the piston member on the chemical liquid injector and the resonance antenna is disposed to the other of the left and right in the state in which the cylinder member is held by the cylinder holding mechanism in the particular orientation, in the chemical liquid injector, and

wherein the reader antenna is spaced from the resonance antenna by a distance of substantially an integral multiple of a wavelength in the wireless communication.

12. A chemical liquid injection system comprising:

a liquid syringe wherein a piston member is slidably inserted into a cylindrical member of a cylindrical shape having an annular cylinder flange formed on an outer circumference of a trailing end from the back thereof, and

a chemical liquid injector for injecting a liquid into a patient by relatively moving the cylinder member and the piston member of the liquid syringe mounted interchangeably,

wherein the liquid syringe includes an RFID (Radio Frequency Identification) chip put on an outer circumference surface of the cylinder member, the RFID chip including a circuit chip connected to a chip antenna in a predetermined plane shape to wirelessly transmit recorded data,

the chemical liquid injector includes a cylinder holding mechanism for individually holding a left portion and a right portion of the cylinder flange of the liquid syringe inserted from above, a piston driving mechanism for at least pressing the piston member into the held cylinder member, an RFID reader including a reader antenna in a predetermined plane shape connected to a communication circuit to wirelessly receive the recorded data from the RFID chip, a resonance antenna in a predetermined plane shape, and operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

the RFID chip, in the liquid syringe, is disposed such that substantially the center of the RFID chip is located on the left or right of the cylinder member when the liquid syringe is held by the cylinder holding mechanism in a particular orientation in rotation about the axis, and

the reader antenna is disposed in a plane direction substantially in parallel with the chip antenna and to one of the left and right of the piston member on the chemical liquid injector and the resonance antenna is disposed to the other of the left and right in the state in which the cylinder member is held by the cylinder holding mechanism in the particular orientation, in the chemical liquid injector, and

wherein a leading end portion of the piston member is located at a trailing end portion of the cylinder member in the liquid syringe, and the RFID chip is put on the outer circumference surface of the trailing end portion of the cylinder member at a position overlapping the leading end portion of the piston member.

13. A chemical liquid injection system comprising:

a liquid syringe wherein a piston member is slidably inserted into a cylindrical member of a cylindrical shape having an annular cylinder flange formed on an outer circumference of a trailing end from the back thereof, and

a chemical liquid injector for injecting a liquid into a patient by relatively moving the cylinder member and the piston member of the liquid syringe mounted interchangeably,

wherein the liquid syringe includes an RFID (Radio Frequency Identification) chip put on an outer circumference surface of the cylinder member, the RFID chip including a circuit chip connected to a chip antenna in a predetermined plane shape to wirelessly transmit recorded data,

the chemical liquid injector includes a cylinder holding mechanism for individually holding a left portion and a right portion of the cylinder flange of the liquid syringe inserted from above, a piston driving mechanism for at least pressing the piston member into the held cylinder member, an RFID reader including a reader antenna in a predetermined plane shape connected to a communication circuit to wirelessly receive the recorded data from the RFID chip, a resonance antenna in a predetermined plane shape, and operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

the RFID chip, in the liquid syringe, is disposed such that substantially the center of the RFID chip is located on the left or right of the cylinder member when the liquid syringe is held by the cylinder holding mechanism in a particular orientation in rotation about the axis, and

the reader antenna is disposed in a plane direction substantially in parallel with the chip antenna and to one of the left and right of the piston member on the chemical liquid injector and the resonance antenna is disposed to the other of the left and right in the state in which the cylinder member is held by the cylinder holding mechanism in the particular orientation, in the chemical liquid injector, and

wherein the RFID chip has various types of data recorded thereon as the recorded data, and

the chemical liquid injector comprises data display means for outputting as display at least some of the various types of data wirelessly received from the RFID chip.

14. A chemical liquid injection system comprising:

a liquid syringe wherein a piston member is slidably inserted into a cylindrical member of a cylindrical shape having an annular cylinder flange formed on an outer circumference of a trailing end from the back thereof, and

a chemical liquid injector for injecting a liquid into a patient by relatively moving the cylinder member and the piston member of the liquid syringe mounted interchangeably,

wherein the liquid syringe includes an RFID (Radio Frequency Identification) chip put on an outer circumference surface of the cylinder member, the RFID chip including a circuit chip connected to a chip antenna in a predetermined plane shape to wirelessly transmit recorded data,

the chemical liquid injector includes a cylinder holding mechanism for individually holding a left portion and a right portion of the cylinder flange of the liquid syringe inserted from above, a piston driving mechanism for at least pressing the piston member into the held cylinder member, an RFID reader including a reader antenna in a predetermined plane shape connected to a communication circuit to wirelessly receive the recorded data from the RFID chip, a resonance antenna in a predetermined plane shape, and operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

the RFID chip, in the liquid syringe, is disposed such that substantially the center of the RFID chip is located on the left or right of the cylinder member when the liquid syringe is held by the cylinder holding mechanism in a particular orientation in rotation about the axis, and

the reader antenna is disposed in a plane direction substantially in parallel with the chip antenna and to one of the left and right of the piston member on the chemical liquid injector and the resonance antenna is disposed to the other of the left and right in the state in which the cylinder member is held by the cylinder holding mechanism in the particular orientation, in the chemical liquid injector, and

wherein the operation control means returns the piston driving mechanism to an initial position when completion of injection operation is detected and then detection of the RFID chip by the RFID reader is ended.

15. A chemical liquid injection system comprising:

a liquid syringe wherein a piston member is slidably inserted into a cylindrical member of a cylindrical shape having an annular cylinder flange formed on an outer circumference of a trailing end from the back thereof, and

a chemical liquid injector for injecting a liquid into a patient by relatively moving the cylinder member and the piston member of the liquid syringe mounted interchangeably,

wherein the liquid syringe includes an RFID (Radio Frequency Identification) chip put on an outer circumference surface of the cylinder member, the RFID chip including a circuit chip connected to a chip antenna in a predetermined plane shape to wirelessly transmit recorded data,

the chemical liquid injector includes a cylinder holding mechanism for individually holding a left portion and a right portion of the cylinder flange of the liquid syringe inserted from above, a piston driving mechanism for at least pressing the piston member into the held cylinder member, an RFID reader including a reader antenna in a predetermined plane shape connected to a communication circuit to wirelessly receive the recorded data from the RFID chip, a resonance antenna in a predetermined plane shape, and operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

the RFID chip, in the liquid syringe, is disposed such that substantially the center of the RFID chip is located on the left or right of the cylinder member when the liquid syringe is held by the cylinder holding mechanism in a particular orientation in rotation about the axis, and

the reader antenna is disposed in a plane direction substantially in parallel with the chip antenna and to one of the left and right of the piston member on the chemical liquid injector and the resonance antenna is disposed to the other of the left and right in the state in which the cylinder member is held by the cylinder holding mechanism in the particular orientation, in the chemical liquid injector, and

wherein the operation control means comprises data holding means for holding the various types of data wirelessly received from the RFID chip and injection control means for controlling operation of the piston driving mechanism in accordance with at least some of the various types of held data.

16. The chemical liquid injection system according to claim 15, wherein the liquid syringe is of a pre-filled type which is shipped with the liquid syringe filled with a contrast medium as the liquid to be injected into a patient whose diagnostic image is taken by a diagnostic imaging apparatus, the RFID chip of the liquid syringe having a variable pattern set thereon with which an injection rate of the contrast medium is changed with time, and

the operation control means changes an operation rate of the piston driving mechanism in accordance with the variable pattern.

17. A chemical liquid injection system comprising:

a liquid syringe wherein a piston member is slidably inserted into a cylindrical member of a cylindrical shape having an annular cylinder flange formed on an outer circumference of a trailing end from the back thereof, and

a chemical liquid injector for injecting a liquid into a patient by relatively moving the cylinder member and the piston member of the liquid syringe mounted interchangeably,

wherein the liquid syringe includes an RFID (Radio Frequency Identification) chip put on an outer circumference surface of the cylinder member, the RFID chip including a circuit chip connected to a chip antenna in a predetermined plane shape to wirelessly transmit recorded data,

the chemical liquid injector includes a cylinder holding mechanism for individually holding a left portion and a right portion of the cylinder flange of the liquid syringe inserted from above, a piston driving mechanism for at least pressing the piston member into the held cylinder member, an RFID reader including a reader antenna in a predetermined plane shape connected to a communication circuit to wirelessly receive the recorded data from the RFID chip, a resonance antenna in a predetermined plane shape, and operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

the RFID chip, in the liquid syringe, is disposed such that substantially the center of the RFID chip is located on the left or right of the cylinder member when the liquid syringe is held by the cylinder holding mechanism in a particular orientation in rotation about the axis, and

the reader antenna is disposed in a plane direction substantially in parallel with the chip antenna and to one of the left and right of the piston member on the chemical liquid injector and the resonance antenna is disposed to the other of the left and right in the state in which the cylinder member is held by the cylinder holding mechanism in the particular orientation, in the chemical liquid injector, and

wherein the operation control means comprises check storing means for storing a predetermined check condition as data, data comparing means for comparing the check condition stored as data with the various types of data wirelessly received from the RFID chip, and alarm outputting means for outputting and notifying a check alarm in accordance with the comparison result.

18. A chemical liquid injection system comprising:

a liquid syringe wherein a piston member is slidably inserted into a cylindrical member of a cylindrical shape having an annular cylinder flange formed on an outer circumference of a trailing end from the back thereof, and

a chemical liquid injector for injecting a liquid into a patient by relatively moving the cylinder member and the piston member of the liquid syringe mounted interchangeably,

wherein the liquid syringe includes an RFID (Radio Frequency Identification) chip put on an outer circumference surface of the cylinder member, the RFID chip including a circuit chip connected to a chip antenna in a predetermined plane shape to wirelessly transmit recorded data,

the chemical liquid injector includes a cylinder holding mechanism for individually holding a left portion and a right portion of the cylinder flange of the liquid syringe inserted from above, a piston driving mechanism for at least pressing the piston member into the held cylinder member, an RFID reader including a reader antenna in a predetermined plane shape connected to a communication circuit to wirelessly receive the recorded data from the RFID chip, a resonance antenna in a predetermined plane shape, and operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

the RFID chip, in the liquid syringe, is disposed such that substantially the center of the RFID chip is located on the left or right of the cylinder member when the liquid syringe is held by the cylinder holding mechanism in a particular orientation in rotation about the axis, and

the reader antenna is disposed in a plane direction substantially in parallel with the chip antenna and to one of the left and right of the piston member on the chemical liquid injector and the resonance antenna is disposed to the other of the left and right in the state in which the cylinder member is held by the cylinder holding mechanism in the particular orientation, in the chemical liquid injector, and

wherein the RFID chip has at least a production number of the liquid syringe for each item set thereon, and

the operation control means includes data accumulating means for storing data of the production number of the liquid syringe mounted and used to perform injection operation, data comparing means for comparing the stored production number with the new production number, and alarm outputting means for outputting and notifying a check alarm when the compared production numbers match.

19. A chemical liquid injection system comprising:

a liquid syringe wherein a piston member is slidably inserted into a cylindrical member of a cylindrical shape having an annular cylinder flange formed on an outer circumference of a trailing end from the back thereof, and

a chemical liquid injector for injecting a liquid into a patient by relatively moving the cylinder member and the piston member of the liquid syringe mounted interchangeably,

wherein the liquid syringe includes an RFID (Radio Frequency Identification) chip put on an outer circumference surface of the cylinder member, the RFID chip including a circuit chip connected to a chip antenna in a predetermined plane shape to wirelessly transmit recorded data,

the chemical liquid injector includes a cylinder holding mechanism for individually holding a left portion and a right portion of the cylinder flange of the liquid syringe inserted from above, a piston driving mechanism for at least pressing the piston member into the held cylinder member, an RFID reader including a reader antenna in a predetermined plane shape connected to a communication circuit to wirelessly receive the recorded data from the RFID chip, a resonance antenna in a predetermined plane shape, and operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

the reader antenna is disposed in a plane direction substantially in parallel with the chip antenna and to one of the left and right of the piston member on the chemical liquid injector and the resonance antenna is disposed to the other of the left and right in the state in which the cylinder member is held b the cylinder holding mechanism in the particular orientation, in the chemical liquid injector, and

wherein the RFID chip is put on the liquid syringe to record at least the fact that that liquid syringe is once used, and

the operation control means includes data recording means for recording, on the RFID chip of the liquid syringe, data of the fact that that liquid syringe has been mounted and the liquid thereof has been injected, and alarm outputting means for outputting and notifying a check alarm when that data is wirelessly received from the RFID chip of the liquid syringe.

20. A chemical liquid injector for injecting a liquid into a patient by relatively moving a cylinder member and a piston member of a liquid syringe mounted interchangeably, comprising:

a cylinder holding mechanism for individually holding the left portion and the right portion of a cylinder flange formed on an outer circumference of a trailing end of a cylinder member of a liquid syringe inserted from above,

a piston driving mechanism for at least pressing a piston member of the liquid syringe into the held cylinder member,

an RFID reader including a reader antenna in a predetermined plane shape connected to a communication circuit to wirelessly receive recorded data from an RFID chip put on an outer circumference surface of the cylinder member, the RFID chip including a chip antenna in a predetermined plane shape connected to a circuit chip to wirelessly transmit recorded data,

a pair of resonance antennas in a predetermined plane shape,

an interfering conductor in a predetermined plane shape longer and larger than the reader antenna, and

operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

wherein the reader antenna is disposed in a plane direction substantially in parallel with the chip antenna and below the piston member in the state in which the cylinder member is held by the cylinder holding mechanism in an orientation rotated by a right angle from the particular orientation, the paired resonance antennas are disposed in a plane direction substantially in parallel with the chip antenna and to the left and right of the piston member in the state in which the cylinder member is held by the cylinder holding mechanism in the particular orientation, and the interfering conductor is disposed in a plane direction substantially in parallel with the chip antenna and immediately below the RFID chip in the state in which the cylinder member is held by the cylinder holding mechanism in an orientation rotated by a right angle from the particular orientation.

21. A chemical liquid injector for injecting a liquid into a patient by relatively moving a cylinder member and a piston member of a liquid syringe mounted interchangeably, comprising:

a cylinder holding mechanism for individually holding the left portion and the right portion of a cylinder flange formed on an outer circumference of a trailing end of a cylinder member of a liquid syringe of the maximum size inserted from above with a pair of metallic flange holding members and for holding at least one type of cylinder adapter inserted from above, the cylinder adaptor is provided for each of liquid syringes of sizes other than the maximum size,

a piston driving mechanism for at least pressing the a piston member of the liquid syringe into the held cylinder member of the liquid syringe,

an RFID reader including a reader antenna in a predetermined plane shape connected to a communication circuit to wirelessly receive recorded data from an RFID chip put on an outer circumference surface of the cylinder member, the RFID chip including a chip antenna in a predetermined plane shape connected to a circuit chip to wirelessly transmit recorded data,

a pair of resonance antennas in a predetermined plane shape,

an auxiliary antenna in a predetermined plane shape shorter and smaller than the reader antenna, and

operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

wherein the reader antenna is disposed in a plane direction substantially in parallel with the chip antenna and below the piston member in the state in which the liquid syringe of the maximum size is held by the cylinder holding mechanism in the particular orientation, the paired resonance antennas are disposed in a plane direction substantially in parallel with the chip antenna and to the left and right of the piston member in the state in which the liquid syringe of the maximum size is held by the cylinder holding mechanism in an orientation rotated by a right angle from the particular orientation, and the auxiliary antenna is disposed in a plane direction substantially in parallel with the chip antenna and immediately below the RFID chip in the state in which the liquid syringe of the maximum size is held by the cylinder holding mechanism in the particular orientation, and

the chip antenna is located at the rear of the flange holding members in the state in which the liquid syringe of a size other than the maximum size is held by the cylinder adapter put in the cylinder holding mechanism.

22. A chemical liquid injector for injecting a liquid into a patient by relatively moving a cylinder member and a piston member of a liquid syringe mounted interchangeably, comprising:

a cylinder holding mechanism for individually holding the left portion and the right portion of a cylinder flange formed on an outer circumference of a trailing end of a cylinder member of a liquid syringe inserted from above,

a piston driving mechanism for at least pressing a piston member of the liquid syringe into the held cylinder member,

an RFID reader including a reader antenna in a predetermined elongated shape connected to a communication circuit to wirelessly receive recorded data from an RFID chip put on an outer circumference surface of the cylinder member, the RFID chip including a chip antenna in a predetermined plane shape connected to a circuit chip to wirelessly transmit recorded data,

a pair of resonance antennas in a predetermined elongated shape,

an interfering conductor longer and larger than the reader antenna, and

operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

wherein the reader antenna is disposed in a longitudinal direction substantially in parallel with the chip antenna and below the piston member in the state in which the cylinder member is held by the cylinder holding mechanism in an orientation rotated by a right angle from the particular orientation, the paired resonance antennas are disposed in a longitudinal direction substantially in parallel with the chip antenna and to the left and right of the piston member in the state in which the cylinder member is held by the cylinder holding mechanism in the particular orientation, and the interfering conductor is disposed in a longitudinal direction substantially in parallel with the chip antenna and immediately below the RFID chip in the state in which the cylinder member is held by the cylinder holding mechanism in an orientation rotated by a right angle from the particular orientation.

23. A chemical liquid injector for injecting a liquid into a patient by relatively moving a cylinder member and a piston member of a liquid syringe mounted interchangeably, comprising:

a cylinder holding mechanism for individually holding the left portion and the right portion of a cylinder flange formed on an outer circumference of a trailing end of a cylinder member of a liquid syringe of the maximum size inserted from above with a pair of metallic flange holding members and for holding at least one type of cylinder adapter inserted from above, the cylinder adaptor is provided for each of liquid syringes of sizes other than the maximum size,

a piston driving mechanism for at least pressing a piston member of the liquid syringe into the held cylinder member of the liquid syringe,

an RFID reader including a reader antenna in a predetermined elongated shape connected to a communication circuit to wirelessly receive recorded data from the an RFID chip put on an outer circumference surface of the cylinder member, the RFID chip including a chip antenna in a predetermined plane shape connected to a circuit chip to wirelessly transmit recorded data,

a pair of resonance antennas in a predetermined elongated shape,

an auxiliary antenna in a predetermined elongated shape shorter and smaller than the reader antenna, and

operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

wherein the reader antenna is disposed in a longitudinal direction substantially in parallel with the chip antenna and below the piston member in the state in which the liquid syringe of the maximum size is held by the cylinder holding mechanism in the particular orientation, the paired resonance antennas are disposed in a longitudinal direction substantially in parallel with the chip antenna and to the left and right of the piston member in the state in which the liquid syringe of the maximum size is held by the cylinder holding mechanism in an orientation rotated by a right angle from the particular orientation, and the auxiliary antenna is disposed in a longitudinal direction substantially in parallel with the chip antenna and immediately below the RFID chip in the state in which the liquid syringe of the maximum size is held by the cylinder holding mechanism in the particular orientation, and

the chip antenna is located at the rear of the flange holding members in the state in which the liquid syringe of a size other than the maximum size is held by the cylinder adapter put in the cylinder holding mechanism.

24. A liquid syringe of a chemical liquid injection system the chemical liquid injection system comprising:

a liquid syringe wherein a piston member is slidably inserted into a cylindrical member of a cylindrical shape having an annular cylinder flange formed on an outer circumference of a trailing end from the back thereof, and

a chemical liquid injector for injecting a liquid into a patient by relatively moving the cylinder member and the piston member of the liquid syringe mounted interchangeably,

the chemical liquid injector includes a cylinder holding mechanism for individually holding a left portion and a right portion of the cylinder flange of the liquid syringe inserted from above, a piston driving mechanism for at least pressing the piston member into the held cylinder member, an RFID reader including a reader antenna in a predetermined plane shape connected to a communication circuit to wirelessly receive the recorded data from an RFID chip including a circuit chip connected to a chip antenna in a predetermined plane shape, a resonance antenna in a predetermined plane shape, and operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received, and

the reader antenna is disposed in a plane direction substantially in parallel with the chip antenna and to one of the left and right of the piston member and the resonance antenna is disposed on the other of the left and right in the state in which the cylinder member is held by the cylinder holding mechanism in the particular orientation, in the chemical liquid injector,

wherein the liquid syringe includes the RFID chip put on an outer circumference surface of the cylinder member, and

wherein the RFID chip is put on the liquid syringe disposed such that substantially the center of the RFID chip is located on the left or right of the outer circumference of the cylinder member when the liquid syringe is held by the cylinder holding mechanism in a particular orientation in rotation about the axis.

37. A chemical liquid injection system comprising:

a liquid syringe wherein a piston member is slidably inserted into a cylindrical member of a cylindrical shape having an annular cylinder flange formed on an outer circumference of a trailing end from the back thereof, and

a chemical liquid injector for injecting a liquid into a patient by relatively moving the cylinder member and the piston member of the liquid syringe mounted interchangeably,

wherein the liquid syringe includes an RFID chip wound and put on an outer circumference surface of the cylinder member, the RFID chip including a chip antenna in a predetermined elongated shape connected to a circuit chip to wirelessly transmit recorded data,

the chemical liquid injector includes a cylinder holding mechanism for individually holding a left portion and a right portion of the cylinder flange of the liquid syringe inserted from above, a piston driving mechanism for at least pressing the piston member into the held cylinder member, an RFID reader including a reader antenna in a predetermined elongated shape connected to a communication circuit to wirelessly receive the recorded data from the RFID chip, a resonance antenna in a predetermined elongated shape, and operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

the RFID chip, in the liquid syringe, is disposed such that substantially the center of the RFID chip is located on the left or right of the cylinder member when the liquid syringe is held by the cylinder holding mechanism in a particular orientation in rotation about the axis, and

the reader antenna is disposed in a longitudinal direction substantially in parallel with the chip antenna and to one of the left and right of the piston member on the chemical liquid injector and the resonance antenna is disposed to the other of the left and right in the state in which the cylinder member is held by the cylinder holding mechanism in the particular orientation, in the chemical liquid injector, and

wherein the reader antenna is spaced from the resonance antenna by a distance of substantially one-half wavelength in the wireless communication.

38. The chemical liquid injection system according to claim 37, wherein the RFID chip wirelessly communicates with the RFID reader at a frequency of “

2.45 (GHz)”

, and

the reader antenna is spaced from the resonance antenna by a distance of approximately “

60 (mm)”

.

39. The A chemical liquid injection system comprising:

a liquid syringe wherein a piston member is slidably inserted into a cylindrical member of a cylindrical shape having an annular cylinder flange formed on an outer circumference of a trailing end from the back thereof, and

a chemical liquid injector for injecting a liquid into a patient by relatively moving the cylinder member and the piston member of the liquid syringe mounted interchangeably,

wherein the liquid syringe includes an RFID chip wound and put on an outer circumference surface of the cylinder member, the RFID chip including a chip antenna in a predetermined elongated shape connected to a circuit chip to wirelessly transmit recorded data,

the chemical liquid injector includes a cylinder holding mechanism for individually holding a left portion and a right portion of the cylinder flange of the liquid syringe inserted from above, a piston driving mechanism for at least pressing the piston member into the held cylinder member, an RFID reader including a reader antenna in a predetermined elongated shape connected to a communication circuit to wirelessly receive the recorded data from the RFID chip, a resonance antenna in a predetermined elongated shape, and operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

the RFID chip, in the liquid syringe, is disposed such that substantially the center of the RFID chip is located on the left or right of the cylinder member when the liquid syringe is held by the cylinder holding mechanism in a particular orientation in rotation about the axis, and

the reader antenna is disposed in a longitudinal direction substantially in parallel with the chip antenna and to one of the left and right of the piston member on the chemical liquid injector and the resonance antenna is disposed to the other of the left and right in the state in which the cylinder member is held by the cylinder holding mechanism in the particular orientation, in the chemical liquid injector, and

wherein the reader antenna is spaced from the resonance antenna by a distance of substantially an integral multiple of a wavelength in the wireless communication.

42. A chemical liquid injection system comprising:

a liquid syringe wherein a piston member is slidably inserted into a cylindrical member of a cylindrical shape having an annular cylinder flange formed on an outer circumference of a trailing end from the back thereof, and

a chemical liquid injector for injecting a liquid into a patient by relatively moving the cylinder member and the piston member of the liquid syringe mounted interchangeably,

wherein the liquid syringe includes an RFID chip wound and put on an outer circumference surface of the cylinder member, the RFID chip including a chip antenna in a predetermined elongated shape connected to a circuit chip to wirelessly transmit recorded data,

the chemical liquid injector includes a cylinder holding mechanism for individually holding a left portion and a right portion of the cylinder flange of the liquid syringe inserted from above, a piston driving mechanism for at least pressing the piston member into the held cylinder member, an RFID reader including a reader antenna in a predetermined elongated shape connected to a communication circuit to wirelessly receive the recorded data from the RFID chip, a resonance antenna in a predetermined elongated shape, and operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

the RFID chip, in the liquid syringe, is disposed such that substantially the center of the RFID chip is located on the left or right of the cylinder member when the liquid syringe is held by the cylinder holding mechanism in a particular orientation in rotation about the axis, and

the reader antenna is disposed in a longitudinal direction substantially in parallel with the chip antenna and to one of the left and right of the piston member on the chemical liquid injector and the resonance antenna is disposed to the other of the left and right in the state in which the cylinder member is held by the cylinder holding mechanism in the particular orientation, in the chemical liquid injector, and

wherein a leading end portion of the piston member is located at a trailing end portion of the cylinder member in the liquid syringe, and the RFID chip is put on the outer circumference surface of the trailing end portion of the cylinder member at a position overlapping the leading end portion of the piston member.

47. A chemical liquid injection system comprising:

a liquid syringe wherein a piston member is slidably inserted into a cylindrical member of a cylindrical shape having an annular cylinder flange formed on an outer circumference of a trailing end from the back thereof, and

a chemical liquid injector for injecting a liquid into a patient by relatively moving the cylinder member and the piston member of the liquid syringe mounted interchangeably,

wherein the liquid syringe includes an RFID chip wound and put on an outer circumference surface of the cylinder member, the RFID chip including a chip antenna in a predetermined elongated shape connected to a circuit chip to wirelessly transmit recorded data,

the chemical liquid injector includes a cylinder holding mechanism for individually holding a left portion and a right portion of the cylinder flange of the liquid syringe inserted from above, a piston driving mechanism for at least pressing the piston member into the held cylinder member, an RFID reader including a reader antenna in a predetermined elongated shape connected to a communication circuit to wirelessly receive the recorded data from the RFID chip, a resonance antenna in a predetermined elongated shape, and operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

the RFID chip, in the liquid syringe, is disposed such that substantially the center of the RFID chip is located on the left or right of the cylinder member when the liquid syringe is held by the cylinder holding mechanism in a particular orientation in rotation about the axis, and

the reader antenna is disposed in a longitudinal direction substantially in parallel with the chip antenna and to one of the left and right of the piston member on the chemical liquid injector and the resonance antenna is disposed to the other of the left and right in the state in which the cylinder member is held by the cylinder holding mechanism in the particular orientation, in the chemical liquid injector, and

wherein the RFID chip has various types of data recorded thereon as the recorded data, and

the chemical liquid injector comprises data display means for outputting as display at least some of the various types of data wirelessly received from the RFID chip.

52. A chemical liquid injection system comprising:

a liquid syringe wherein a piston member is slidably inserted into a cylindrical member of a cylindrical shape having an annular cylinder flange formed on an outer circumference of a trailing end from the back thereof, and

a chemical liquid injector for injecting a liquid into a patient by relatively moving the cylinder member and the piston member of the liquid syringe mounted interchangeably,

wherein the liquid syringe includes an RFID chip wound and put on an outer circumference surface of the cylinder member, the RFID chip including a chip antenna in a predetermined elongated shape connected to a circuit chip to wirelessly transmit recorded data,

the chemical liquid injector includes a cylinder holding mechanism for individually holding a left portion and a right portion of the cylinder flange of the liquid syringe inserted from above, a piston driving mechanism for at least pressing the piston member into the held cylinder member, an RFID reader including a reader antenna in a predetermined elongated shape connected to a communication circuit to wirelessly receive the recorded data from the RFID chip, a resonance antenna in a predetermined elongated shape, and operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

the RFID chip, in the liquid syringe, is disposed such that substantially the center of the RFID chip is located on the left or right of the cylinder member when the liquid syringe is held by the cylinder holding mechanism in a particular orientation in rotation about the axis, and

the reader antenna is disposed in a longitudinal direction substantially in parallel with the chip antenna and to one of the left and right of the piston member on the chemical liquid injector and the resonance antenna is disposed to the other of the left and right in the state in which the cylinder member is held by the cylinder holding mechanism in the particular orientation, in the chemical liquid injector, and

wherein the operation control means returns the piston driving mechanism to an initial position when completion of injection operation is detected and then detection of the RFID chip by the RFID reader is ended.

59. A chemical liquid injection system comprising:

a liquid syringe wherein a piston member is slidably inserted into a cylindrical member of a cylindrical shape having an annular cylinder flange formed on an outer circumference of a trailing end from the back thereof, and

a chemical liquid injector for injecting a liquid into a patient by relatively moving the cylinder member and the piston member of the liquid syringe mounted interchangeably,

wherein the liquid syringe includes an RFID chip wound and put on an outer circumference surface of the cylinder member, the RFID chip including a chip antenna in a predetermined elongated shape connected to a circuit chip to wirelessly transmit recorded data,

the chemical liquid injector includes a cylinder holding mechanism for individually holding a left portion and a right portion of the cylinder flange of the liquid syringe inserted from above, a piston driving mechanism for at least pressing the piston member into the held cylinder member, an RFID reader including a reader antenna in a predetermined elongated shape connected to a communication circuit to wirelessly receive the recorded data from the RFID chip, a resonance antenna in a predetermined elongated shape, and operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

the RFID chip, in the liquid syringe, is disposed such that substantially the center of the RFID chip is located on the left or right of the cylinder member when the liquid syringe is held by the cylinder holding mechanism in a particular orientation in rotation about the axis, and

the reader antenna is disposed in a longitudinal direction substantially in parallel with the chip antenna and to one of the left and right of the piston member on the chemical liquid injector and the resonance antenna is disposed to the other of the left and right in the state in which the cylinder member is held by the cylinder holding mechanism in the particular orientation, in the chemical liquid injector, and

wherein the operation control means comprises data holding means for holding the various types of data wirelessly received from the RFID chip and injection control means for controlling operation of the piston driving mechanism in accordance with at least some of the various types of held data.

60. The chemical liquid injection system according to claim 59, wherein the liquid syringe is of a pre-filled type which is shipped with the liquid syringe filled with a contrast medium as the liquid to be injected into a patient whose diagnostic image is taken by a diagnostic imaging apparatus, the RFID chip of the liquid syringe having a variable pattern set thereon with which an injection rate of the contrast medium is changed with time, and

the operation control means changes an operation rate of the piston driving mechanism in accordance with the variable pattern.

67. A chemical liquid injection system comprising:

a liquid syringe wherein a piston member is slidably inserted into a cylindrical member of a cylindrical shape having an annular cylinder flange formed on an outer circumference of a trailing end from the back thereof, and

a chemical liquid injector for injecting a liquid into a patient by relatively moving the cylinder member and the piston member of the liquid syringe mounted interchangeably,

wherein the liquid syringe includes an RFID chip wound and put on an outer circumference surface of the cylinder member, the RFID chip including a chip antenna in a predetermined elongated shape connected to a circuit chip to wirelessly transmit recorded data,

the chemical liquid injector includes a cylinder holding mechanism for individually holding a left portion and a right portion of the cylinder flange of the liquid syringe inserted from above, a piston driving mechanism for at least pressing the piston member into the held cylinder member, an RFID reader including a reader antenna in a predetermined elongated shape connected to a communication circuit to wirelessly receive the recorded data from the RFID chip, a resonance antenna in a predetermined elongated shape, and operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

the RFID chip, in the liquid syringe, is disposed such that substantially the center of the RFID chip is located on the left or right of the cylinder member when the liquid syringe is held by the cylinder holding mechanism in a particular orientation in rotation about the axis, and

the reader antenna is disposed in a longitudinal direction substantially in parallel with the chip antenna and to one of the left and right of the piston member on the chemical liquid injector and the resonance antenna is disposed to the other of the left and right in the state in which the cylinder member is held by the cylinder holding mechanism in the particular orientation, in the chemical liquid injector, and

wherein the operation control means comprises check storing means for storing a predetermined check condition as data, data comparing means for comparing the check condition stored as data with the various types of data wirelessly received from the RFID chip, and alarm outputting means for outputting and notifying a check alarm in accordance with the comparison result.

72. A chemical liquid injection system comprising:

a liquid syringe wherein a piston member is slidably inserted into a cylindrical member of a cylindrical shape having an annular cylinder flange formed on an outer circumference of a trailing end from the back thereof, and

a chemical liquid injector for injecting a liquid into a patient by relatively moving the cylinder member and the piston member of the liquid syringe mounted interchangeably,

wherein the liquid syringe includes an RFID chip wound and put on an outer circumference surface of the cylinder member, the RFID chip including a chip antenna in a predetermined elongated shape connected to a circuit chip to wirelessly transmit recorded data,

the chemical liquid injector includes a cylinder holding mechanism for individually holding a left portion and a right portion of the cylinder flange of the liquid syringe inserted from above, a piston driving mechanism for at least pressing the piston member into the held cylinder member, an RFID reader including a reader antenna in a predetermined elongated shape connected to a communication circuit to wirelessly receive the recorded data from the RFID chip, a resonance antenna in a predetermined elongated shape, and operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

the RFID chip, in the liquid syringe, is disposed such that substantially the center of the RFID chip is located on the left or right of the cylinder member when the liquid syringe is held by the cylinder holding mechanism in a particular orientation in rotation about the axis, and

the reader antenna is disposed in a longitudinal direction substantially in parallel with the chip antenna and to one of the left and right of the piston member on the chemical liquid injector and the resonance antenna is disposed to the other of the left and right in the state in which the cylinder member is held by the cylinder holding mechanism in the particular orientation, in the chemical liquid injector, and

wherein the RFID chip has at least a production number of the liquid syringe for each item set thereon, and

the operation control means includes data accumulating means for storing data of the production number of the liquid syringe mounted and used to perform injection operation, data comparing means for comparing the stored production number with the new production number, and alarm outputting means for outputting and notifying a check alarm when the compared production numbers match.

77. The A chemical liquid injection system comprising:

a liquid syringe wherein a piston member is slidably inserted into a cylindrical member of a cylindrical shape having an annular cylinder flange formed on an outer circumference of a trailing end from the back thereof, and

a chemical liquid injector for injecting a liquid into a patient by relatively moving the cylinder member and the piston member of the liquid syringe mounted interchangeably,

wherein the liquid syringe includes an RFID chip wound and put on an outer circumference surface of the cylinder member, the RFID chip including a chip antenna in a predetermined elongated shape connected to a circuit chip to wirelessly transmit recorded data,

the chemical liquid injector includes a cylinder holding mechanism for individually holding a left portion and a right portion of the cylinder flange of the liquid syringe inserted from above, a piston driving mechanism for at least pressing the piston member into the held cylinder member, an RFID reader including a reader antenna in a predetermined elongated shape connected to a communication circuit to wirelessly receive the recorded data from the RFID chip, a resonance antenna in a predetermined elongated shape, and operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

the RFID chip, in the liquid syringe, is disposed such that substantially the center of the RFID chip is located on the left or right of the cylinder member when the liquid syringe is held by the cylinder holding mechanism in a particular orientation in rotation about the axis, and

the reader antenna is disposed in a longitudinal direction substantially in parallel with the chip antenna and to one of the left and right of the piston member on the chemical liquid injector and the resonance antenna is disposed to the other of the left and right in the state in which the cylinder member is held by the cylinder holding mechanism in the particular orientation, in the chemical liquid injector, and

wherein the RFID chip is put on the liquid syringe to record at least the fact that that liquid syringe is once used, and

the operation control means includes data recording means for recording, on the RFID chip of the liquid syringe, data of the fact that that liquid syringe has been mounted and the liquid thereof has been injected, and alarm outputting means for outputting and notifying a check alarm when that data is wirelessly received from the RFID chip of the liquid syringe.

81. A liquid syringe of a chemical liquid injection system, the chemical liquid injection system comprising:

a liquid syringe wherein a piston member is slidably inserted into a cylindrical member of a cylindrical shape having an annular cylinder flange formed on an outer circumference of a trailing end from the back thereof, and

a chemical liquid injector for injecting a liquid into a patient by relatively moving the cylinder member and the piston member of the liquid syringe mounted interchangeably,

the chemical liquid injector includes a cylinder holding mechanism for individually holding a left portion and a right portion of the cylinder flange of the liquid syringe inserted from above, a piston driving mechanism for at least pressing the piston member into the held cylinder member, an RFID reader including a reader antenna in a predetermined elongated shape connected to a communication circuit to wirelessly receive recorded data from an RFID chip including a circuit chip connected to a chip antenna in a predetermined plate shape, a resonance antenna in a predetermined elongated shape, and operation control means for allowing operation of the piston driving mechanism only when the recorded data is wirelessly received,

the reader antenna is disposed in a longitudinal direction substantially in parallel with the chip antenna and to one of the left and right of the piston member on the chemical liquid injector and the resonance antenna is disposed to the other of the left and right in the state in which the cylinder member is held by the cylinder holding mechanism in the particular orientation, in the chemical liquid injector,

wherein the liquid syringe includes the RFID chip put on an outer circumference surface of the cylinder member, and

wherein the RFID chip is put on the liquid syringe disposed such that substantially the center of the RFID chip is located on the left or right of the outer circumference of the cylinder member when the liquid syringe is held by the cylinder holding mechanism in a particular orientation in rotation about the axis.