摘要
为了验证MicroSPECT系统的探测器的设计方案,使用DETECT2000进行闪烁晶体内光子输运过程的Monte Carlo模拟。MicroSPECT系统探测器部分使用4个探测面积为49 mm×49 mm的位置灵敏光电倍增管H8500拼接组成。与之配合的闪烁晶体阵列的面积为103.75mm×103.75mm,像素大小为1.45mm×1.45mm。电子学电路通过位置权重法计算闪烁事件发生的位置。结果表明,闪烁晶体阵列中有效成像像素为55×55,且光电倍增管的拼接部分仍然具有探测能力,初步证明了该系统设计的可行性。
The DETECT2000 Monte Carlo simulation program was used for verifying the MicroSPECT system detector design.Each of the four H8500 position sensitive photon multiplier tubes has a detection area of 49 mm×49 mm.The pixel size of the composite scintillation crystal array is 1.45 mm×1.45 mm and the total detection area is 103.75 mm×103.75 mm.The positions of scintillated events were calculated by position weight method in circuit.The results show that the scintillation crystal array has an effective area of 55×55 pixels and that the joint parts of photon multiplier tubes are available for detection.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第z1期942-946,共5页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金资助项目(10505012)
