Radiation detector and positron emission tomography apparatus
AssigneeHamamatsu Photonics K.K.
InventorsKento HAKAMATA, Hidemoto YAMAUCHI
Life of this patent
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Abstract
A radiation detector has a scintillator array including a plurality of first scintillator blocks arranged in parallel with each other in a first layer; one second scintillator block arranged in a second layer so as to extend across each of the plurality of first scintillator blocks; a reflective member disposed between adjacent ones of the first scintillator blocks; a first optical discontinuity portion provided between each of the plurality of first scintillator blocks and the second scintillator block; and a light detection unit optically coupled to an end surface of one of the first scintillator blocks and an end surface of another of the first scintillator blocks.
Claims7
A radiation detector comprising:
- a scintillator array including a plurality of first scintillator blocks arranged in parallel with each other in a first layer;
- one second scintillator block arranged in a second layer so as to extend across each of the plurality of first scintillator blocks;
- a reflective member disposed between adjacent ones of the first scintillator blocks;
- a first optical discontinuity portion provided between each of the plurality of first scintillator blocks and the second scintillator block;
- and
- a light detection unit optically coupled to an end surface of one of the first scintillator blocks and an end surface of another of the first scintillator blocks.
A positron emission tomography apparatus comprising:
- a subject holding unit configured to hold a subject to which a radioactive agent has been administered;
- radiation detectors arranged in a ring shape for detecting radiation emitted from the subject;
- and
- means for, based on outputs of the radiation detectors, identifying a position at which scintillation light is generated, recording the identified position, identifying a position of a radiation emission site from the recorded positions using a mathematical method, and displaying the identified position on a display device,
- wherein the radiation detector comprises:
- a scintillator array including a plurality of first scintillator blocks arranged in parallel with each other in a first layer;
- one second scintillator block arranged in a second layer so as to extend across each of the plurality of first scintillator blocks;
- a reflective member disposed between adjacent ones of the first scintillator blocks;
- a first optical discontinuity portion provided between each of the plurality of first scintillator blocks and the second scintillator block;
- and
- a light detection unit optically coupled to an end surface of one of the first scintillator blocks and to an end surface of the other of the first scintillator blocks.
Dependencies are inferred from the claim text.