Method and apparatus for radiation detection

• US 20070045547A1
• Filed: 03/20/2006
• Published: 03/01/2007
• Est. Priority Date: 02/02/1996
• Status: Active Grant

• Current Assignee: Nova R&D Incorporated (Kromek Group PLC)
• Original Assignee: Tumay Tumer
• Inventors: Tumer, Tumay
• Granted Patent: US 7,566,879 B2
• Time in Patent Office: Days
• US Class Current: 250/363.30
• CPC Class Codes: A61B 6/037 Emission tomography
• CPC Class Codes: G01T 1/006 Total absorption calorimeters; Shower detectors
• CPC Class Codes: G01T 1/2928 using solid state detectors
• CPC Class Codes: G01T 1/2985 In depth localisation, e.g. using positron emitters; Tomographic imaging (longitudinal and transverse section imaging; apparatus for radiation diagnosis sequentially in different planes, steroscopic radiation diagnosis); using external radiation sources A61B6/02
• CPC Class Codes: H01L 27/14659 Direct radiation imagers structures
• CPC Class Codes: H01L 31/115 Devices sensitive to very short wavelength, e.g. X-rays, gamma-rays or corpuscular radiation

Abstract

An imaging system for imaging an object has an x-ray source for emitting x-rays. A detection system has a plurality of position sensitive detector planes, and the object is located between the x-ray source and the detection system. A portion of the x-rays pass through said object and pass into said plurality of detector planes and are detected within the plurality of detector planes. A multi-channel readout system is coupled to the plurality of position sensitive detector planes. A display system is coupled to the multi-channel readout system, and the display system displays an image of said object. A portion of the x-rays passing into the plurality of detector planes undergoes at least one Compton scatter within the plurality of detection planes and is detected. A total or partial energy corresponding to each portion of the emitted x-rays is recorded by a multichannel readout system. The direction for the said detected x-ray is determined and the direction and total or partial energy corresponding to each detected x-ray is processed by a multi-channel readout system to generate said image.

Claims

1-67. -67. (canceled)

68. A detector system, said system comprising:

at least one detector array;

a carrier coupled to said at least one detector array;

at least one readout chip coupled to said carrier; and

said carrier mounted onto a data acquisition board.

69. The detector system of claims 68, wherein said detector array is a pad array.

70. The detector system of claims 68, wherein said detector array is a pad array.

71. The detector system of claims 68, wherein said detector array is are comprised of a group of detector materials including HpGe, Ge, CdTe, CdZnTe, HgI₂, GaAs, PbI₂, CsI(Tl), CdWo₄, CsF, NaI(Tl), CsI(Na), BGO, LSO, PbCO₃ and GSO.

72. A detector system, said system comprising:

at least one position sensitive detector;

a carrier coupled to said at least one detector;

at least one readout chip coupled to said carrier; and

said carrier mounted onto a data acquisition board.

73. The detector system of claims 72, wherein said detector array is a pixel array.

74. The detector system of claims 72, wherein said detector array is a pad array.

75. The detector system of claims 72, wherein said detector array is are comprised of a group of detector materials including HpGe, Ge, CdTe, CdZnTe, HgI₂, GaAs, PbI₂, CsI(Tl), CdWo₄, CsF, NaI(Tl), CsI(Na), BGO, LSO, PbCO₃ and GSO.

76. A detector system, said system comprising:

at least one strip detector;

said at least one strip detector is mounted onto at least one readout board;

at least one readout chip mounted onto said at least one readout board; and

said at least one readout chip coupled to said at least one strip detector.

77. The detector system of claims 76, wherein said strip detector is a double sided strip detector.

78. The detector system of claim 77, wherein strips on each side of said double sided strip detector are at an angle to each other.

79. A detector system, said system comprising:

at least two strip detectors;

at least one strip of said at least one strip detector is coupled to at least one strip of another said at least one strip detector;

said at least one strip detector is mounted onto at least one readout board;

at least one readout chip mounted onto said readout board; and

said at least one readout chip coupled to said at least one strip detector.

80. The detector system of claims 79, wherein said strip detector is a double sided strip detector.

81. The detector system of claim 80, wherein strips on each side of said double sided strip detector are at an angle to each other.

82. A detector system, said system comprising:

a plurality of detectors wherein each detector is comprising a scintillator coupled to a light detector;

said plurality of detectors are mounted on a board;

at least one chip mounted onto said board; and

said at least one chip is coupled to said plurality of detectors.

83. The detector system of claim 82, wherein said scitillator is selected from a group of detector materials including CsI(Tl), CdWo₄, CsF, NaI(Tl), CsI(Na), BGO, LSO, PbCO₃ and GSO.

84. The detector system of claim 82, wherein said light detector is selected from a group of light detectors including diodes, photodiodes, avalanche photodiodes (APDs), photomultiplier tubes (PMTs), Multi Anode PMTs.

85. The detector system of claim 82, wherein said chip is a multichannel readout ASIC.

86. A detector system, said system comprising:

a scintillator;

at least two light detectors;

said at least two light detectors are coupled to said scintillator; and

said detector system mounted on a board.

87. The detector system of claim 86, wherein said detector systems are mounted side by side to form a detector array.

88. The detector system of claim 86, wherein said scitillator is selected from a group of detector materials including CsI(Tl), CdWo₄, CsF, NaI(Tl), CsI(Na), BGO, LSO, PbCO₃ and GSO.

89. The detector system of claim 86, wherein said light detector is selected from a group of light detectors including diodes, photodiodes, avalanche photodiodes (APDs), photomultiplier tubes (PMTs), Multi Anode PMTs.

90. A method of photon detection, the method comprising the steps of:

scattering the photon in at least one detector and determining the position of the first interaction;

producing at least one recoil electron at said interaction;

allowing said recoil electron to enter at least one detector to make at least one interaction and determining the position of said at least one interaction;

determining the direction of the recoil electron using said first interaction and at least one subsequent interaction; and

using said direction of the recoil electron in determining the direction of said photon.

91. The method of claim 90, further determining the energy of said first interaction and said at least one interaction.

92. The method of claim 90, wherein said recoil electron making multiple interactions at multiple detectors.

93. The method of claim 90, wherein said scattered photon making at least one interactions in at least one detector.