Readout electronics of a high-resolution gamma camera

ZHANG Mengjiao QI Yuji

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Readout electronics of a high-resolution gamma camera

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- Readout electronics of a high-resolution gamma camera
- NUCLEAR TECHNIQUES Issue 7, (2007)
- 作者机构：
  
  1. 中国科学院上海应用物理研究所
  2. 中国科学院上海应用物理研究所,上海,201800
- 作者简介：
- 基金信息：
  
  国家自然科学基金(30570520)资助
- DOI：
  CLC： TB852.1
- Published：01 July 2007
- 稿件说明：
移动端阅览
[1]张猛蛟,漆玉金.高分辨小型伽玛相机位置读出电路研究[J].核技术,2007(07):629-632.

ZHANG Mengjiao QI Yuji. Readout electronics of a high-resolution gamma camera[J]. Nuclear techniques, 2007, (7): 629-632.
[1]张猛蛟,漆玉金.高分辨小型伽玛相机位置读出电路研究[J].核技术,2007(07):629-632. DOI：

ZHANG Mengjiao QI Yuji. Readout electronics of a high-resolution gamma camera[J]. Nuclear techniques, 2007, (7): 629-632. DOI：

摘要

本文介绍一种新型的位置读出方法

用于开发高分辨的小型伽玛相机。该伽玛相机采用小单元的CsI（Na）晶体阵列与位置灵敏光电倍增管（PSPMT）结合的探测器。其位置读出电路的设计把常规的阻抗电荷分配法与多路单通道直接读出法的优点结合在一起

由硬件实现局域重心法（Truncated center of gravity）计算读出的位置

取得很好的效果。该伽玛相机的内在分辨率接近1mm

视野（FOV）达探测器的灵敏范围。这种新型的位置读出方法也可用于更高集成度的多阳极的位置灵敏光电倍增管的位置读出。

Abstract

To develop high resolution gamma camera

a novel readout method is adopted.The detector of the gamma camera is based on CsI(Na) scintillation crystal array coupling with position-sensitive photomultiplier(PSPMT).The novel readout scheme utilizes the truncated center-of-gravity(TCOG) method

which hybridizes the conventional re-sistive readout and the individual analogue readout.The TCOG design was tested on a readout circuit board made by ourselves.As a result

the gamma camera could achieve an intrinsic spatial-resolution of 1 mm.The field-of-view(FOV) was also improved to cover the active area of the detector.In conclusion

the TCOG method is an effective approach to developing high-resolution compact gamma camera.This method can also be used in the newly high-integrated multi-anode PSPMT.

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Development of data acquisition system for a portable compact gamma camera

Related Author

SONG Jian1

2 QI Yujin1 ZHAO Cuilan1

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Related Institution

Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China) 2

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