多阳极位置灵敏光电倍增管(PSPMT)被广泛地用来开发高分辨的小型γ相机模块.探讨了PSPMT、的位置读出电路的简化设计研究,并针对日本滨松的H8500型多阳极PSPMT,设计和开发了离散位置读出电路(DPC)和均衡电荷分配电路(SCDC)两种简化的位置读出电路,并在SCDC中加入了局域重心(TCOG)的定位方法,进一步地优化读出电路的简化设计.初步的实验测试结果表明,SCDC结合TCOG定位法,能显著地改善探测器的定位非线性及压缩效应,扩展有效的成像视野(FOV),比DPC方法的有效视野增大了约20%.
The multi-anode position sensitive photomultiplier tube(PSPMT)has been used for the development of high-resolution γ camera module.This study is aimed to investigate the simplified readout design for the multi-anode flat panel PSPMT.Based on the Hamamatsu H8500 PSPMT with 64 multi-anodes,we designed and developed two simplified readout circuits,discretized positioning circuit(DPC)and symmetric charge division circuit(SCDC).The truncated center-of-gravity(TCOG)positioning method was used to optimize the readout signal processing and then further reduce the readout channels by a resistor chain.The preliminary results show that the SCDC readout with the TCOG could significantly reduce the non-linearity of positioning and improve the effective field-of-view of the detector by about 20% as compared to the DPC readout.
参考文献
| [1] | Blankenberg F G.IEEE Eng Med & Biol Mag,2004,23(4):51. |
| [2] | Cherry S R.Phys Med Biol,2004,49:R13. |
| [3] | Meikle S R,Kench P,Kassiou M,et al.Phys Med Biol,2005,50(22):R45. |
| [4] | Datasheet:Hamamatsu Tube Assembly H8500.http://www.hamamatsu.com. |
| [5] | Peter D O,Jonathan A T.Frezghi H,et al.IEEE Nucl Sci,2005,51(1):21. |
| [6] | Qi Huirong,Wang Jinchuan,Xiao Guoqing,et al.Nuclear Electronics and Detection Technology,2006,26(4):451(in Chinese).(祁辉荣,王金川,肖国青等.核电子学与探测技术,2006,26(4):451.) |
| [7] | Siegel S,Cherry S R,Shao Y.IEEE Trans Nucl Sci,1996,43(3):1634. |
| [8] | Popov V,Majewski S,Weisenberger A G.IEEE Nucl Sci SympConf Rec,2003,3:2156. |
| [9] | Zhang Mengjao,Qi Yujin.Nuclear Science and Techniques,2007,30(7):629(in Chinese).(张猛蛟,漆玉金.核技术,2007,30(7):629.) |
| [10] | Qi Y J,Zhang M J,Zhao C L,et al.IEEE Nucl Sci Symp Conf Rec,2007,M19-67,3725. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%