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Positron emission tomography detector for multilayer scintillation crystal

A technology of positron emission and scintillation crystals, which is applied in the field of detector devices, can solve the problems of time-consuming and laborious acquisition of reference data, and the inability to mass-produce detectors, and achieve the effects of improving spatial resolution, improving imaging quality, and high detection efficiency

Active Publication Date: 2012-10-03
RAYCAN TECH CO LTD SU ZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The acquisition of reference data is time-consuming and laborious, which also determines that this kind of detector cannot be mass-produced, and it is difficult to apply it to the actual PET system

Method used

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  • Positron emission tomography detector for multilayer scintillation crystal
  • Positron emission tomography detector for multilayer scintillation crystal
  • Positron emission tomography detector for multilayer scintillation crystal

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Effect test

Embodiment 1

[0044] Such as figure 1 As shown, the multilayer scintillation crystal PET detector includes a multilayer scintillation crystal 1 , a photodetector system 2 and an algorithm system 3 . Among them, the multi-layer scintillation crystal 1 is composed of two layers of scintillation crystals, the top layer of scintillation crystal 4 is an array scintillation crystal, and the bottom layer of scintillation crystal 5 is a continuous scintillation crystal; the connected surfaces of the two layers of scintillation crystals are coupled together by optical glue. The scintillation crystal 4 on the top layer is in the shape of a cube, which is composed of 6×6 scintillation crystal strips of the same size spliced ​​on the horizontal plane. The bottom surface of the underlying scintillation crystal 5 is directly coupled with the photodetector system 2 . The photodetector system 2 is composed of 4×4 SiPMs. The scintillation crystal 5 on the bottom layer has a height of 1 mm, and the scintil...

Embodiment 2

[0046] Such as figure 2 As shown, the multilayer scintillation crystal PET detector includes a multilayer scintillation crystal 1, a photodetector system 2 and an algorithm system 3, wherein the multilayer scintillation crystal 1 is composed of two layers of scintillation crystals, and the top layer of scintillation crystals 4 is an array scintillation crystal, The scintillation crystals 5 at the bottom layer are continuous scintillation crystals; the connected surfaces of the two layers of scintillation crystals are coupled together by optical glue and have exactly the same shape and size. The scintillation crystal 4 on the top layer is in the shape of a cube, which is composed of 6×6 scintillation crystal strips of the same size spliced ​​on the horizontal plane. The bottom surface of the underlying scintillation crystal 5 is coupled with the photodetector system 2 through the light guide 6 . The photodetector system 2 is composed of 4×4 SiPMs. The scintillation crystal 5...

Embodiment 3

[0048] Such as image 3As shown, the multilayer scintillation crystal PET detector includes a multilayer scintillation crystal 1, a photodetector system 2 and an algorithm system 3, wherein the multilayer scintillation crystal 1 is composed of two layers of scintillation crystals, and the top layer of scintillation crystals 4 is an array scintillation crystal, The scintillation crystals 5 at the bottom layer are continuous scintillation crystals; the connected surfaces of the two layers of scintillation crystals are coupled together by optical glue. The appearance shape of the scintillation crystals 4 on the top layer is a truncated cone. The top surface and the bottom surface of the array scintillation crystals are parallel to each other, and are composed of 4×4 scintillation crystal strips spliced ​​on the horizontal plane. The bottom surface of the underlying scintillation crystal 5 is coupled with the photodetector system 2 through optical glue. The scintillation crystal ...

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Abstract

A positron emission tomography detector for a multilayer scintillation crystal comprises a plurality of layers of scintillation crystals, a photoelectric detector system and an algorithm system, wherein the multilayer scintillation crystals comprises n layers of array scintillation crystals and m layers of continuous scintillation crystals, both n and m are integers which are greater than or equal to 1, the sum of n and m is smaller than or equal to 10, the array scintillation crystals are formed by arraying strip-type scintillation crystals along the width and length directions, the continuous scintillation crystals are scintillation crystals which have uncut inner parts, the array scintillation crystals and the continuous scintillation crystals are sequentially coupled along the height direction of the strip-type scintillation crystals to form the multilayer scintillation crystals, and the bottoms of the continuous scintillation crystals are coupled with the photoelectric detector system. The positron emission tomography detector can more accurately obtain the position and the time of energy deposition of gamma photon in the scintillation crystal, and has higher detection efficiency of the gamma photon, the spatial resolution, the time resolution and the flexibility of a positron emission tomographic imaging system can be improved when the positron emission tomography detector is applied to the positron emission tomographic imaging system, and further, the imaging quality of the system can be improved.

Description

technical field [0001] The invention relates to the field of positron emission tomography equipment, in particular to a detector device in the positron emission tomography equipment. Background technique [0002] The Positron Emission Tomography (PET) detector is the key device in the PET imaging equipment, and its main function is to obtain the position, time and energy information of each gamma photon energy deposition in the PET event. In the process of designing and implementing a PET imaging system, in order to improve the imaging performance of the system, it is hoped that the positron emission tomography detector used can provide deposition depth (Depth of Interaction, DOI) information, have high detection efficiency, good Temporal resolution as well as good spatial resolution. [0003] In existing positron emission tomography detectors, the scintillation crystal part is usually a single-layer array scintillation crystal or continuous scintillation crystal. For posi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/29
CPCA61B6/4258A61B6/00G01T1/1644G01T1/1642G01T1/202G01T1/2985G01T1/2002G01T1/20G01T3/06
Inventor 谢庆国奚道明朱俊王璐瑶
Owner RAYCAN TECH CO LTD SU ZHOU
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