Silicon detector for a Compton camera in nuclear medical imaging
Silicon detector for a Compton camera in nuclear medical imaging
复制标题
用于核医学成像康普顿相机的硅探测器
DOI：
10.1109/nssmic.2000.949368
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
W. Rogers
中科院分区：
文献类型：
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作者：
D. Meier;A. Czermak;P. Jalocha;B. Sowicki;M. Kowal;W. Duliński;G. Maehblum;E. Nygård;K. Yoshioka;J. Fuster;C. Lacasta;M. Mikuž;S. Roe;P. Weilhammer;C. Hua;S. Park;S. J. Wildermann;L. Zhang;N. Clinthorne;W. Rogers
基于硅垫传感器中的康普顿散射的电子准直伽马相机可以改善核医学和生物医学研究中的成像。这里描述的工作集中在硅垫探测器的原型康普顿相机。硅垫传感器的读出使用低噪声VLSI CMOS芯片和新型快速触发芯片。根据不同的应用，需要将传感器及其读出电子器件轻重量且密集地封装在混合电路上。作者描述了硅垫传感器和他们的读出新设计的混合。他们还提出了一个模块化的和低成本的数据采集系统（CCDAQ）的基础上的数字信号处理器是接口到广泛使用的个人计算机的EPP端口。用CCDAQ和混合能谱仪获得了锝（/sub 43//sup 99 m/Tc）和镅（/sub 95//sup 241/Am）的γ光子能谱，对/sub 43//sup 99 m/Tc的140.5keV光吸收线的能量分辨率为2.45keV半高宽。对于所有焊盘，触发芯片中的辨别阈值在（15和25）keV之间。
Electronically collimated gamma cameras based on Compton scattering in silicon pad sensors may improve imaging in nuclear medicine and bio-medical research. The work described here concentrates on the silicon pad detector for a prototype Compton camera. The silicon pad sensors are read out using low noise VLSI CMOS chips and novel fast triggering chips. Depending on the application a light weight and dense packaging of sensors and its readout electronics on a hybrid is required. The authors describe the silicon pad sensor and their readout on the newly designed hybrid. They also present a modular and low-cost data acquisition system (CCDAQ) based on a digital signal processor which is interfaced to the EPP port of widely available personal computers. Using the CCDAQ and the hybrids energy spectra of gamma-ray photons from technetium (/sub 43//sup 99m/Tc) an americium (/sub 95//sup 241/Am) were acquired with an energy resolution of 2.45 keV FWHM for the 140.5 keV photo-absorption line of /sub 43//sup 99m/Tc. For all pads the discrimination threshold in the trigger chip was between (15 and 25) keV.