Multi-gamma photon coincidence imaging system and method based on slit-hole flat plate 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: 2020-08-28
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 Disclosed is a multi-gamma photon coincidence imaging system based on a slit-hole plate collimator

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  • Multi-gamma photon coincidence imaging system and method based on slit-hole flat plate collimator
  • Multi-gamma photon coincidence imaging system and method based on slit-hole flat plate collimator
  • Multi-gamma photon coincidence imaging system and method based on slit-hole flat plate 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 4 As shown (for the convenience of drawing, the slit plate collimator 1 only draws 3 collimation slits 12, and the pinhole plate collimator 2 only draws 9 collimation holes 22), the system consists of detection planes arranged perpendicular to each other Each of the first probe and the second probe is composed of a time matching module 5 and a computer platform 6 . The first probe consists of a slit plate collimator 1 (such as figure 2 shown) and the first gamma photon detector 3, the slit plate collimator 1 is formed by opening several collimation slits 12 on an alloy plate 11, in the present embodiment, the slit plate collimator 1 The collimating slits 12 have the same size, are arranged parallel to each other and at equal intervals, forming a collimating slit array. The second probe consists of ...

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Abstract

The invention discloses a multi-gamma photon coincidence imaging system and method based on a slit-hole flat plate collimator. The system comprises a time coincidence module, a computer platform, at least one first probe and at least one second probe, wherein the first probe is composed of a slit flat plate collimator and a first gamma photon detector, and the second probe is composed of a hole flat plate collimator and a second gamma photon detector. According to the imaging method, the decay position range of radionuclide is reduced into a plurality of intersection points of a plurality of projection planes determined by a gamma photon event detected by the first probe and a plurality of projection lines determined by a gamma photon event detected by the second probe in a multi-gamma photon coincidence event in an imaging range, so that the distribution of the radionuclide in the measured range is obtained. According to the invention, the detection efficiency of the multi-gamma photon coincidence event is improved, the reconstruction algorithm is simplified, and the signal-to-noise ratio of the reconstructed image is improved, so that the requirement on the total count of gamma photons is reduced.

Description

technical field [0001] The invention belongs to the technical field of emission tomography, in particular to a multi-gamma photon coincidence imaging system and method based on a slit-hole plate 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, nervous...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/167G01T1/30
CPCG01T1/167G01T1/30
Inventor 刘亚强马天予刘潇
Owner TSINGHUA UNIV
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