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Multi-gamma photon coincidence imaging system and method based on slit-hole hybrid collimator

A technology of gamma photon and imaging system, which is used in instruments, scientific instruments, radiation measurement, etc. to improve detection efficiency, improve signal-to-noise ratio, and simplify image reconstruction algorithms.

Active Publication Date: 2020-09-08
TSINGHUA UNIV
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Problems solved by technology

[0008] The object of the present invention aims to solve the problems of the above-mentioned PET system, SPECT system and a proposed multi-gamma photon simultaneous emission drug time coincident nuclear medicine imaging system and multi-gamma photon coincident imaging system and method in principle, the present invention A multi-gamma photon coincidence imaging system based on a slit-hole hybrid collimator is disclosed

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  • Multi-gamma photon coincidence imaging system and method based on slit-hole hybrid collimator
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  • Multi-gamma photon coincidence imaging system and method based on slit-hole hybrid collimator

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Embodiment 1

[0037] The overall structure of the imaging system of this embodiment is as follows figure 1 As shown, the schematic diagram of its detection and positioning is shown in figure 2 , 3 As shown (for the convenience of drawing, the slit-hole hybrid collimator 1 only draws part of the collimating holes and collimating slits, figure 2 with image 3 It is a schematic diagram of the detection and positioning of the imaging system when using differently arranged slit-hole hybrid collimators 1), the system consists of two slit-hole hybrid collimators 1 arranged perpendicularly to each other, and the two slit-hole hybrid collimators 1 are respectively mixed with each slit. The gamma photon detector 2 parallel to the detector 1, the time coincidence module 3 and the computer platform 4 are composed. The slit-hole hybrid collimator 1 is formed by opening several collimating holes 11 and several collimating slits 12 on an alloy plate, see Figure 4 with Figure 5 , in this embodimen...

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Abstract

The invention discloses a multi-gamma photon coincidence imaging system and method based on a slit-hole hybrid collimator. The system comprises a time coincidence module, a computer platform, the slit-hole hybrid collimator and a gamma photon detector, wherein the slit-hole mixed collimator is formed by forming a plurality of collimation slits and collimation holes in an alloy plate, and the alloyplate is a plane plate or a curved plate. According to the imaging method, the position range of radioactive nuclide decay is reduced to intersection points of several projection planes determined bya gamma photon event detected by a collimating slit in a gamma photon detector in a multi gamma photon coincidence event and an imaging range of the projection lines determined by the gamma photon event detected by a collimating hole in the gamma photon detector so as to obtain the distribution of the radionuclide in the measured range. The method is advantaged in that detection efficiency of themulti-gamma photon coincidence event is improved, a signal-to-noise ratio of a reconstructed image is improved, so the requirement on the total counting number of gamma photons is reduced.

Description

technical field [0001] The invention belongs to the technical field of emission tomography, and in particular relates to a multi-gamma photon coincidence imaging system and method based on a slit hybrid collimator. Background technique [0002] Emission tomography is one of the important techniques for detecting the internal information of objects today, and it has a large number of applications in various research fields. By detecting the gamma photons emitted from the detected object outside the detected object and reconstructing the image, the internal information of the detected object can be observed in a non-invasive way. In the field of emission tomography, the most important imaging systems are Positron Emission Tomography (hereinafter referred to as PET), Single-Photon Emission Computed Tomography (hereinafter referred to as SPECT) and Compton Camera, etc. At present, both PET and SPECT have been widely used in clinical examination and diagnosis, including cancer,...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/29G01T1/164
CPCG01T1/2985G01T1/1642Y02E30/30
Inventor 刘亚强马天予刘潇
Owner TSINGHUA UNIV
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