Grid mould for emission imaging device, detector and emission imaging device

Abstract

The invention provides a grid mould for an emission imaging device, a detector and an emission imaging device. The grid mould comprises a shell, multiple transverse walls and multiple longitudinal walls, wherein the transverse walls are located in the shell and transversely extend along the shell in parallel, the longitudinal walls are located in the shell and longitudinal extend along the shell in parallel, the transverse walls and the longitudinal walls divide a lower space in the shell into multiple grid grooves distributed in a matrix mode, and the heights of the transverse walls and the longitudinal walls are gradually reduced from the periphery of the shell to the center of the shell. The heights of the transverse walls and the longitudinal walls are precisely measured, the grid mould can accurately control projection distribution of visible photon groups generated due to high-energy photon annihilation, and accordingly the best crystal decoding effect can be achieved. The grid mould can be manufactured by assembling the transverse walls and the longitudinal walls such as sheets, precise control over surface performance, appearance and the size can be achieved, and performance of the detector is remarkably improved.

Description

technical field [0001] The present invention relates to an emission imaging system, in particular to a grid mold for a detector of an emission imaging device, a detector with the grid mold, and an emission imaging device with the detector. Background technique [0002] Emission imaging devices, including positron emission imaging devices, have been used for medical diagnosis. Taking positron emission imaging equipment as an example, it uses the phenomenon that the positrons produced by the decay of positron isotopes and the negative electrons in the human body have an annihilation effect, leading to the injection of compounds labeled with positron isotopes into the human body, using the method of composite detection , using a detector to detect the annihilation effect produced by γ The photons can obtain the distribution information of isotopes in the human body, and the computer can reconstruct and combine operations to obtain a three-dimensional tomographic image of the d...

AI Technical Summary

Problems solved by technology

As for the depth of the groove 121, as mentioned above, in order to obtain the best crystal decoding effect, there is a certain accuracy requirement for the depth of the groove 121 (such as 200 micron precision), which is difficult to meet with traditional cutting techniques.

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