Grid mould, detector including same and emission imaging equipment

Abstract

The invention provides a grid mould, a detector including the grid mould and emission imaging equipment. The grid mould comprises a plurality of transverse walls, a plurality of longitudinal walls and light reflecting layers. The transverse walls and the longitudinal walls extend transversely and longitudinally respectively to form a plurality of grid troughs which are arranged in a m*n matrix mode and used for containing scintillation crystal of the detector, m and n are positive integers, and light-transmitting windows with light capable of penetrating side walls are formed in the side walls of the grid troughs. The light reflecting layers are arranged on the areas, except for the light-transmitting windows, of the side walls. The grid mould obtains the information of the depth of interaction (DOI) of the scintillation crystal, and the space resolution ratio and the system detection sensitivity of the emission imaging equipment can be 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 including the grid mold, and an emission imaging device including 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 detectors to detect gamma photons produced by the annihilation effect. [0003] The detector mainly consists of three parts, such as figure 1 As shown, that is, a crystal matrix 110 composed of discrete scintillation crystals, a glass light g...

AI Technical Summary

Problems solved by technology

Positron emission imaging equipment without DOI measurement function cannot accurately confirm the true position of the gamma photons, and can only default to the specific position of the scintillation crystal 210 (such as the center of the front end) as the two endpoints of the response straight line segment, resulting in a certain error

This error, caused by the uncertainty in the location of the conversion of gamma photons to visible photons within the depth range of the crystal, leads to a reduction in the spatial resolution of the reconstructed image

[0005] From the above analysis, it can be seen that if the length (depth) of the scintillation crystal is larger, the DOI will be more obvious, which is not conducive to the spatial resolution.

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