Method and apparatus for radiation detection
First Claim
1. An imaging system for imaging an object, comprising:
- an x-ray source emitting x-rays;
a detection system comprised of a hodoscope, wherein said object is located between said x-ray source and said hodoscope, said hodoscope comprised of a plurality of position sensitive detector planes, wherein a portion of said x-rays passing through said object pass into said hodoscope and are scattered within said hodoscope;
a calorimeter placed at a location with respect to the hodoscope wherein the calorimeter is effectively shielded from incident emitted x-rays;
a multi-channel readout system coupled to said plurality of position sensitive detector planes;
a shielding member, said shielding member substantially preventing exposure of said multi-channel readout system to said emitted x-rays;
a processor coupled to said multi-channel readout system; and
a monitor coupled to said processor, said monitor displaying an image of said object.
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Accused Products
Abstract
A detection system is provided. In one embodiment a silicon Compton recoil electron detector uses the Compton double scatter technique with recoil electron tracking to detect medium energy gamma rays from 0.05 to 10 MeV. Two detector layers are required; a silicon microstrip hodoscope and a calorimeter. The incoming photon Compton scatters in the hodoscope. The calorimeter is placed at a location with respect to the hodoscope wherein the calorimeter is effectively shielded from incident emitted x-rays. The second scatter layer is the calorimeter where the scattered gamma ray is totally absorbed. The recoil electron in the hodoscope is tracked through several detector planes until it stops. The x and y position signals from the first two planes of the electron track determine the direction of the recoil electron while the energy loss from all planes determines the energy of the recoil electron. In another embodiment of the invention, the Compton double scatter technique with recoil electron tracking is used to detect x-rays from 300 to 5,000 keV. This embodiment is useful for nondestructive, real time imaging for use in medical imaging and the inspection of munitions items. In another embodiment, a high sensitivity, high spatial resolution and electronically collimated single photon emission computed tomography system which is sensitive from 81 keV to 511 keV gamma ray photons is provided. In another embodiment, a Compton scatter positron emission tomography system is provided.
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Citations
54 Claims
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1. An imaging system for imaging an object, comprising:
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an x-ray source emitting x-rays;
a detection system comprised of a hodoscope, wherein said object is located between said x-ray source and said hodoscope, said hodoscope comprised of a plurality of position sensitive detector planes, wherein a portion of said x-rays passing through said object pass into said hodoscope and are scattered within said hodoscope;
a calorimeter placed at a location with respect to the hodoscope wherein the calorimeter is effectively shielded from incident emitted x-rays;
a multi-channel readout system coupled to said plurality of position sensitive detector planes;
a shielding member, said shielding member substantially preventing exposure of said multi-channel readout system to said emitted x-rays;
a processor coupled to said multi-channel readout system; and
a monitor coupled to said processor, said monitor displaying an image of said object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A radiation detector for detecting gamma rays, comprising:
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a detector aperture, said aperture limiting said detector to a predetermined field-of-view;
a detection system comprised of a hodoscope, said hodoscope comprised of a plurality of position sensitive detector planes, wherein a portion of said gamma rays pass through said aperture into said hodoscope and are scattered within said hodoscope;
a calorimeter placed at a location with respect to the hodoscope wherein the calorimeter is effectively shielded from incident x-rays;
a multi-channel readout system coupled to said detection system;
a processor coupled to said multi-channel readout system; and
an output device to said multi-channel readout system, said output device outputting information corresponding to said detected gamma rays. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54)
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Specification