Assembling device and method of crystal arrays of PET (Polyethylene Terephthalate) detector

Abstract

The invention provides an assembling device and method of crystal arrays of a PET (Polyethylene Terephthalate) detector. The assembling device comprises a square frame, two pushing and blocking components and two spring clamps, wherein the two pushing and blocking components and the two spring clamps are arranged in the square frame; and one ends of the two spring clamps are respectively connected with the two pushing and blocking components, the other ends of the two spring clamps are respectively connected with the two deviated ends on the two adjacent edges of the square frame, and an elastic extruding and setting space of basic crystal array units to be assembled is formed between the other two adjacent edges of the square frames and the two pushing and blocking components. According to the invention, not only can the basic crystal array units bonded by single crystals be conveniently extruded into crystal arrays which are distributed uniformly and have good alignment in the two-dimensional direction so as to guarantee the detecting efficiency of the PET detector in the later-stage manufacture, but also the structure is simple, the cost is low, the operation is convenient and the assembling efficiency of the crystal arrays can be greatly improved.

Description

technical field [0001] The present invention relates to the technical field of positioning and assembly of PET detectors, and more specifically, to an assembly device and method for a crystal array of PET detectors. Background technique [0002] In the application of PET (Positron Emission Tomography, positron emission tomography scanner), it is required to accurately measure the energy of a pair of gamma rays produced after the annihilation of the positron and the position where it hits the detector. At present, the most important PET detector structure is the coupling structure of scintillator array and photomultiplier tube array. When the rays emitted by radioactive elements hit the scintillator in the scintillation crystal array, the scintillation fluorescence is collected and amplified by the photomultiplier tube to obtain According to the position and strength of the electrical signal, the position of the radioactive element can be determined. [0003] The spatial res...

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Problems solved by technology

[0005] In the process of assembling the crystal array, a single crystal needs to be bonded into a basic crystal array unit through optical glue. The usual manual alignment method has great limitations in improving work efficiency. On the other hand, manual alignment is inevitable. There will be errors, and it is difficult to ensure the uniform thickness of the optical glue between each single crystal in the basic crystal array unit and the alignment of all single crystals in the two-dimensional direction, thus affecting the final detector performance

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