X-ray tube operating state acquiring device, x-ray tube operating state acquiring system, and x-ray tube operating state acquiring method

• US 20060008053A1
• Filed: 04/24/2003
• Published: 01/12/2006
• Est. Priority Date: 04/24/2002
• Status: Abandoned Application

• Current Assignee: Hamamatsu Photonics KK
• Original Assignee: Hamamatsu Photonics KK
• Inventors: Nakamura, Tsutomu, Ishikawa, Masayoshi, Yokoi, Takane, Ochiai, Yutaka, Takase, Kinji
• Application Number:
  US10/512,434
• Publication Number:
  US 20060008053A1
• Time in Patent Office: Days
• US Class Current: 378/111
• CPC Class Codes: H05G 1/30 Controlling

Abstract

An X-ray tube controller measures operation information (filament power supply time in an X-ray tube and a grid voltage value applied to grid electrodes to maintain the tube current value under a predetermined tube voltage). The information is transmitted to an X-ray tube operation information acquiring unit via a communication line. In a storage section of the information acquiring unit, a database written with degree of attrition corresponding to the integrated power supply time of a filament (reduction ratio of thermalelectron emission amount (tube current value at a predetermined G1 voltage) to the initial value (thermalelectron emission amount when the filament is first used) is stored. An attrition degree determination section determines the degree of attrition of the filament from the count of filament power supply time with reference to the database. Also, the attrition degree determination section determines the end of life from the G1 voltage value.

Claims

1. An X-ray tube operation status acquiring unit, comprising:

receiving means for receiving operation information about operation status of an X-ray tube transmitted from an X-ray tube measuring apparatus for measuring the operation status of said X-ray tube via a communication line, and

storing means for storing said operation information received by said receiving means.

2. The X-ray tube operation status acquiring unit according to claim 1, wherein said operation information includes filament power supply time.

3. The X-ray tube operation status acquiring unit according to claim 1 or 2, in which said operation information includes a level of a grid voltage applied to grid electrodes so as to maintain the value of the tube current flowing to a target to a certain level in a state where a predetermined tube voltage is applied to said target of said X-ray tube.

4. The X-ray tube operation status acquiring unit according to claim 1, wherein said operation information includes X-ray irradiation time.

5. The X-ray tube operation status acquiring unit according to claim 1 or 4, in which said operation information includes a level of the tube voltage applied to the target of said X-ray tube and a strength of the tube current flowing to said target.

6. The X-ray tube operation status acquiring unit according to claim 1 or 4, in which said operation information includes a strength of the X-ray generated by thermoelectron collided with said target in a state where a predetermined tube voltage is applied to the target of said X-ray tube and a predetermined tube current flows to said target.

7. The X-ray tube operation status acquiring unit as in any of claims 1-6, further comprising attrition degree determination means for determining the degree of attrition of component constituting said X-ray tube based on said operation information.

8. The X-ray tube operation status acquiring unit according to claim 7, in which

said X-ray tube is provided with a filament for emitting thermoelectron by being supplied with power;

said operation information includes filament power supply time;

said attrition degree determination means determines the degree of attrition of said filament based on said filament power supply time.

9. The X-ray tube operation status acquiring unit according to claim 7 or 8, in which

said X-ray tube is provided with a filament for emitting thermoelectron by being supplied with power;

said operation information includes a level of a grid voltage applied to grid electrodes so as to maintain the value of the tube current flowing to said target to a certain level in a state where a predetermined tube voltage is applied to the target of said X-ray tube;

said attrition degree determination means determines the degree of attrition of said filament based on the level of said grid voltage.

10. The X-ray tube operation status acquiring unit as in any of claims 7-9, in which

said operation information includes X-ray irradiation time;

said attrition degree determination means determines the degree of attrition of the target of said X-ray tube based on said X-ray irradiation time.

11. The X-ray tube operation status acquiring unit as in any of claims 7-10, in which

said operation information includes a level of the tube voltage applied to the target of said X-ray tube and a strength of the tube current flowing to said target;

said attrition degree determination means determines the degree of attrition of said target based on the over-time changes of the level of said tube voltage and the strength of said tube current.

12. The X-ray tube operation status acquiring unit as in any of claims 7-11, in which

said operation information includes a strength of the X-ray generated by thermoelectron collided with said target in a state where a predetermined tube voltage is applied to the target of said X-ray tube and a predetermined tube current flows to said target;

said attrition degree determination means determines the degree of attrition of said target based on the strength of said X-ray.

13. The X-ray tube operation status acquiring unit as in any of claims 7-12, further comprising determination result notifying means for notifying determination result by said attrition degree determination means to an information communication terminal via a communication line.

14. The X-ray tube operation status acquiring unit as in any of claims 1-13, further comprising abnormal operation detecting means for detecting abnormal operation of said X-ray tube based on said operation information.

15. The X-ray tube operation status acquiring unit according to claim 14, wherein

said operation information includes a strength of the X-ray generated by thermoelectron collided with said target of said X-ray tube in a state where a predetermined tube voltage is applied to the target of said X-ray tube and a predetermined tube current flows to said target;

said abnormal operation detecting means detects occurrence of electric discharge phenomenon in said X-ray tube based on the strength of said X-ray.

16. The X-ray tube operation status acquiring unit according to claim 14 or 15, further comprising detection result notifying means for notifying detection result by said abnormal operation detecting means to an information communication terminal via a communication line.

17. The X-ray tube operation status acquiring unit as in any of claims 1-16, further comprising presentation means for presenting said operation information stored in said storing means on a display.

18. An X-ray tube operation status acquiring system for controlling the operation status of an X-ray tube, comprising:

an X-ray tube measuring apparatus including measuring means for measuring operation status of said X-ray tube and transmission means for transmitting operation information of said X-ray tube obtained by said measuring means by measuring the operation status of said X-ray tube to an information communication terminal via a communication line, and X-ray tube operation status acquiring unit as in any of claims 1-17, wherein

receiving means of said X-ray tube operation status acquiring unit receives said operation information transmitted by transmission means of said X-ray tube measuring apparatus;

storing means of said X-ray tube operation status acquiring unit stores said operation information received by the receiving means of said X-ray tube operation status acquiring unit.

19. An X-ray tube operation status acquiring method, comprising:

a receiving step in which receiving means receives operation information about operation status of said X-ray tube transmitted from an X-ray tube measuring apparatus for measuring the operation status of the X-ray tube via a communication line, and

a storing step in which storing means stores said operation information received by said receiving means.

20. The X-ray tube operation status acquiring method according to claim 19, wherein said operation information includes filament power supply time.

21. The X-ray tube operation status acquiring method according to claim 19 or 20, in which said operation information includes a level of a grid voltage applied to grid electrodes so as to maintain the value of the tube current flowing to said target to a certain level in a state where a predetermined tube voltage is applied to the target of said X-ray tube.

22. The X-ray tube operation status acquiring method according to claim 19, wherein said operation information includes X-ray irradiation time.

23. The X-ray tube operation status acquiring method according to claim 19 or 22, in which said operation information includes a level of the tube voltage applied to the target of said X-ray tube and a strength of the tube current flowing to said target.

24. The X-ray tube operation status acquiring method according to claim 19 or 22, in which said operation information includes a strength of the X-ray generated by thermoelectron collided with said target in a state where a predetermined tube voltage is applied to the target of said X-ray tube and a predetermined tube current flows to said target.

25. The X-ray tube operation status acquiring method as in any of claims 19-24, further comprising an attrition degree determination step in which attrition degree determination means determines the degree of attrition of component constituting said X-ray tube based on said operation information.

26. The X-ray tube operation status acquiring method according to claim 25, in which

said X-ray tube is provided with a filament for emitting thermoelectron by being supplied with power;

said operation information includes filament power supply time;

said attrition degree determination means determines the degree of attrition of said filament based on said filament power supply time.

27. The X-ray tube operation status acquiring method according to claim 25 or 26, in which

said X-ray tube is provided with a filament for emitting thermoelectron by being supplied with power;

said operation information includes a level of a grid voltage applied to grid electrodes so as to maintain the value of the tube current flowing to said target to a certain level in a state, where a predetermined tube voltage is applied to the target of said X-ray tube;

said attrition degree determination means determines the degree of attrition of said filament based on the level of said grid voltage.

28. The X-ray tube operation status acquiring method as in any of claims 25-27, in which

said operation information includes X-ray irradiation time;

said attrition degree determination means determines the degree of attrition of the target of said X-ray tube based on said X-ray irradiation time.

29. The X-ray tube operation status acquiring method as in any of claims 25-28, in which

said operation information includes a level of the tube voltage applied to the target of said X-ray tube and a strength of the tube current flowing to said target;

said attrition degree determination means determines the degree of attrition of said target based on the over-time changes of the level of said tube voltage and the strength of said tube current.

30. The X-ray tube operation status acquiring method as in any of claims 25-29, in which

said operation information includes strength of the X-ray generated by thermoelectron collided with said target in a state where a predetermined tube voltage is applied to the target of said X-ray tube and a predetermined tube current flows to said target;

said attrition degree determination means determines the degree of attrition of said target based on the strength of said X-ray.

31. The X-ray tube operation status acquiring method as in any of claims 25-30, further comprising a determination result notifying step, in which determination result notifying means notifies determination result by said attrition degree determination means to an information communication terminal via a communication line.

32. The X-ray tube operation status acquiring method as in any of claims 19-31, further comprising an abnormal operation detecting step, in which abnormal operation detecting means detects abnormal operation of said X-ray tube based on said operation information.

33. The X-ray tube operation status acquiring method according to claim 32, wherein

said operation information includes a strength of the X-ray generated by thermoelectron collided with said target of said X-ray tube in a state where a predetermined tube voltage is applied to the target of said X-ray tube and a predetermined tube current flows to said target;

said abnormal operation detecting means detects occurrence of electric discharge phenomenon in said X-ray tube based on the strength of said X-ray.

34. The X-ray tube operation status acquiring method according to claim 32 or 33, further comprising a detection result notifying step, in which detection result notifying means notifies detection result by said abnormal operation detecting means to an information communication terminal via a communication line.

35. The X-ray tube operation status acquiring method as in any of claims 19-34, further comprising a presentation step, in which presentation means presents said operation information stored in said storing means on a display.

36. An X-ray tube operation status acquiring unit for obtaining operation information about operation status of an X-ray tube equipped with a filament for emitting thermoelectron by being supplied with power, comprising:

inputting means for inputting operation information of said X-ray tube outputted from an X-ray tube measuring apparatus for measuring operation status of said X-ray tube and including at least filament power supply time and value of grid voltage applied to grid electrodes so as to maintain the value of tube current flowing to a target in a state where a predetermined tube voltage is applied to said target of said X-ray tube, and

attrition degree determination means for determining degree of attrition of said filament based on said filament power supply time and said grid voltage value.

37. An X-ray tube operation status acquiring unit for obtaining operation information about operation status of an X-ray tube, comprising:

inputting means for inputting operation information of said X-ray tube outputted from an X-ray tube measuring apparatus for measuring operation status of said X-ray tube and including at lest X-ray irradiation time and strength of X-ray generated by thermoelectron collided with a target in a state where a predetermined tube voltage is applied to said target of said X-ray tube and a predetermined tube current flows to said target, and

attrition degree determination means for determining degree of attrition of said target based on said X-ray irradiation time and the strength of said X-ray.

38. An X-ray tube operation information acquiring method for obtaining operation information about operation status of an X-ray tube equipped with a filament for emitting thermoelectron by being supplied with power, comprising:

a first step for obtaining operation information of said X-ray tube outputted from an X-ray tube measuring apparatus for measuring operation status of said X-ray tube and including at least filament power supply time and a value of grid voltage applied to grid electrodes so as to maintain the value of tube current flowing to a target in a state where a predetermined tube voltage is applied to said target of said X-ray tube, and

a second step for determining degree of attrition of said filament based on said filament power supply time and said grid voltage value.

39. An X-ray tube operation information acquiring method for obtaining operation information about operation status of an X-ray tube, comprising:

a first step for obtaining operation information of said X-ray tube outputted from an X-ray tube measuring apparatus for measuring operation status of said X-ray tube and including at lest X-ray irradiation time and a strength of X-ray generated by thermoelectron collided with a target in a state where a predetermined tube voltage is applied to said target of said X-ray tube and a predetermined tube current flows to said target, and

a second step for determining degree of attrition of said target based on said X-ray irradiation time and the strength of said X-ray.