Method for Batch Processing Scintillator Crystal Bars

Abstract

The invention discloses a method for processing scintillator crystal bars in batches, comprising the following steps: grinding the two end faces of the scintillator crystal segment blank; Scintillator wafer; grinding and polishing the two cut surfaces of the scintillator wafer due to cutting; they are bonded and fixed together according to the polished surface, and the two sides of all the scintillator wafers are ground to the same direction and correspondingly combined to form two surfaces to form a scintillator crystal. The two ends of the scintillator block and the two ends of the scintillator crystal segment are respectively bonded and fixed with a piece of glass by adhesive glue; then the scintillator crystal block is cut from one end of the scintillator crystal block to the other end face, and the cutting direction is perpendicular to the cut generated by cutting. Grinding and polishing the two cut surfaces of the scintillator wafer due to cutting, removing the adhesive and the remaining glass sheet, and obtaining the scintillator crystal bar. The processing method can effectively prevent the scintillator crystal bar from breaking, and improve the performance, yield and processing efficiency of the scintillator crystal bar.

Description

technical field [0001] The invention belongs to the technical field of scintillator processing, in particular to a method for batch processing scintillator crystal bars. Background technique [0002] Positron emission tomography (PET), as an advanced nuclear medical imaging technique, has unique advantages in obtaining functional information of certain organs or lesions in humans or animals, and is known as the currently known The best diagnostic technology. The scintillator crystal strip is the core component unit of the PET system detector, and its performance determines the performance of PET to a large extent. Scintillator crystal bars are usually used in the form of scintillator crystal bar arrays, and the production of scintillator crystal bar arrays requires processing of corresponding technical indicators for each scintillator crystal bar unit used. [0003] Scintillator crystal bars are usually processed from scintillator crystal segments, and the crystal segments...

AI Technical Summary

Problems solved by technology

When grinding and polishing the sides, it is necessary to mark the scintillator crystal strips in advance to ensure that all sides of the scintillator crystal strips are polished. Before grinding and polishing, the scintillator crystal strips must be placed in the star wheel. The size of the crystal bar and the gap between the star wheel are relatively small. It usually takes 30-40 minutes for mature workers to place each time, and the smaller the size of the scintillator crystal bar, the longer it takes and the lower the efficiency. During the crystal strip process, scintillator crystal strips are likely to be broken, and during the grinding and polishing process, scintillator crystal strips will be displaced and collided when placed in the star wheel housing cavity, which can easily cause scintillator crystal strips to be chipped and scratched. When grinding and polishing the end surface, it is necessary to clamp the scintillator crystal bar first, then grind and polish the two ends, and then disassemble. The process of clamping and disassembly takes a lot of time and affects work efficiency.

During the six-sided grinding and polishing process of the scintillator crystal bar, the crystal bar needs to be placed on the star wheel 6 times, which seriously reduces the processing efficiency

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