Positron emission tomography (PET) detector module, PET detector submodule and positioning device for photoelectric detector

Abstract

The invention provides a positron emission tomography (PET) detector module, a PET detector submodule and a positioning device for a photoelectric detector. The positioning accuracy of the photoelectric detector can be improved. The positioning device comprises a plurality of installing positions symmetric with respect to the radial center line of the positioning device, the installing positions are through in the radial direction and are used for limiting the installation position of the photoelectric detector, and the positioning device is provided with the bottom surface for being connected with a crystal. Due to the fact that the bottom surface of the positioning device is connected with the crystal, the position of the photoelectric detector on the crystal is also fixed correspondingly, namely the positioning of the photoelectric detector is achieved through the positioning device, and the positioning device is simple in structure and convenient to operate and particularly facilitates installation and maintenance of the photoelectric detector. In addition, even if the photoelectric detector needs to be installed again or replaced, the photoelectric detector only needs to be placed in the installing positions, returning accuracy of the photoelectric detector can be guaranteed by setting the installing positions, position deviation is avoided, and energy spectrum quality is improved.

Description

technical field [0001] The invention relates to the technical field of medical machinery, in particular to a positioning device for a photodetector in a PET detector. The present invention also relates to a PET detector sub-module connected by the above-mentioned positioning device, and a PET detector module formed by connecting the PET detector sub-modules. Background technique [0002] At present, PET (positron emission tomography, positron emission tomography) scanning equipment is a cutting-edge medical imaging diagnostic equipment in the world, using medical imaging technology that performs imaging of human body functions at the molecular level. [0003] The main technical indicators such as position resolution and sensitivity of PET scanning equipment depend on the detector system used, so PET detectors are the core components of nuclear medicine equipment. [0004] The PET scanning equipment consists of a scanning frame, an examination table, a computer system, and a...

AI Technical Summary

Problems solved by technology

[0014] In the way of metal plate connection, since a metal plate is added between the two sub-modules 4', there is a gap of two metal plate thicknesses between the two, and the tomographic image in the gap is correspondingly missing, resulting in a scan has incomplete information and has low precision and accuracy

[0015] In the bonded connection method, there are problems of low assembly accuracy and stability. More importantly, the bonded connection method will bring inconvenience to the subsequent disassembly, which is not convenient for the replacement and replacement of the internal parts of the sub-module 4'. maintain

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