Gain adjustment of photomultiplier tubes of detector module in PET

LU Xiang ZHAO Shujun LI Suxiao ZHANG Lei

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Gain adjustment of photomultiplier tubes of detector module in PET

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- Gain adjustment of photomultiplier tubes of detector module in PET
- NUCLEAR TECHNIQUES Issue 12, (2005)
- 作者机构：
  
  1. 郑州大学物理工程学院
  2. 郑州大学物理工程学院,郑州,450052
- 作者简介：
- 基金信息：
- DOI：
  CLC： TL81
- Published：01 December 2005
- 稿件说明：
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[1]鲁向,赵书俊,李素晓,张雷.正电子发射断层成像探测单元光电倍增管的增益调整[J].核技术,2005(12):943-946.

LU Xiang ZHAO Shujun LI Suxiao ZHANG Lei. Gain adjustment of photomultiplier tubes of detector module in PET[J]. Nuclear techniques, 2005, (12): 943-946.
[1]鲁向,赵书俊,李素晓,张雷.正电子发射断层成像探测单元光电倍增管的增益调整[J].核技术,2005(12):943-946. DOI：

LU Xiang ZHAO Shujun LI Suxiao ZHANG Lei. Gain adjustment of photomultiplier tubes of detector module in PET[J]. Nuclear techniques, 2005, (12): 943-946. DOI：

摘要

保持各个光电倍增管的增益一致性对正电子发射断层成像（PET）的质量至为重要。事件的响应输出取决于光电倍增管对于事件发生位置的光收集效率和事件的能量。光电倍增管对于某位置的光收集效率与光电倍增管对此位置所张的立体角成正比。当光电倍增管增益漂移后

通过计算出的各个管子的输出信号比值的变化完成对增益的自动调整

结果证明方法是有效的。

Abstract

To make all PMTs’ gains identical through auto-adjustment is important for ensuring the PET imaging quality. The response output depends on the light collecting efficiency in the position where the event happens and the energy of light quantum. Light collecting efficiency of PMT in the position is in proportion to solid angle of the PMT at the position. The adjusting value was calculated by the algorithm described in the paper. The result showed that the algorithm was effective in practice.

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