Cherenkov event and gamma event coincidence imaging device and method
An imaging device and imaging method technology, applied in the fields of biomedical diagnostic systems, photoelectric signal processing and nuclear detection, can solve the problems of missing visible light data, etc., to resist the influence of biological tissue self-luminescence, reduce background noise, and improve imaging signal-to-noise ratio Effect
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example 1
[0083] The parameters of data processing in this embodiment are listed here:
[0084] The actual device used in step (1) is a dark box with a size of 1.5m×1.5m×1.5m. The radiation source is 511keV positron annihilation gamma photon 18F-FDG. The red-enhanced silicon photomultiplier tube is used as the photosensitive element for Cherenkov photon detection. The scintillation detector of yttrium lutetium silicate / photomultiplier tube / blue-violet silicon photomultiplier tube is used as the gamma photon detection element, and the specific composition is as follows: Figure 7 As shown, the combination of detector units adopts a ring structure;
[0085] Step (2) using the angle (2-D), time (1-D), position (3-D), and energy (1-D) of the positron event as attribute values to establish a two-particle likelihood function;
[0086] Step (3) the coincidence time is about 2ns, and the coincidence judgment adopts offline time coincidence processing, and the particle counting is gated;
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example 2
[0091] The parameters for processing data in this application example 2 are listed here:
[0092] The actual device used in step (1) is to use a dark box with a size of 0.15m×0.15m×0.15m. The radiation source is 511keV positron annihilation gamma photon 18F-FDG. The red-enhanced silicon photomultiplier tube is used as the photosensitive element for Cherenkov photon detection. The scintillation detector of lanthanum bromide / blue-violet silicon photomultiplier tube is used as the gamma photon detection element, and the combination of detector units adopts a 12-plate structure ;
[0093] Step (2) using the angle (2-D), time (1-D), position (3-D), and energy (1-D) of the positron event as attribute values to establish a two-particle likelihood function;
[0094] Step (3) the coincidence time is about 2ns, and the coincidence judgment adopts offline time coincidence processing, and the particle counting is gated;
[0095] Step (4) adopts the method of list data, without rearra...
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