Readout electronics of a high-resolution gamma camera
Readout electronics of a high-resolution gamma camera
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发表时间：
2007
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通讯作者：
Mengjiao Zhang;Y. Qi
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作者：
Mengjiao Zhang;Y. Qi
为了研制高分辨率γ相机，采用了一种新的读出方法，该方法采用CsI（Na）闪烁晶体阵列与位置灵敏光电倍增管（PSPMT）耦合作为γ相机的探测器，采用截断重心法（TCOG），它与传统的稀土元素杂交，TCOG设计在自制的读出电路板上进行了测试，结果表明，伽马相机可以实现1mm的固有空间分辨率。视场（FOV）也被改进以覆盖探测器的有效区域。总之，TCOG方法是研制高分辨率小型γ相机的有效途径，该方法也可用于新研制的高分辨率小型γ相机。集成多阳极PSPMT。
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.