Silicon Photomultipliers (SiPM) as novel photodetectors for PET
Silicon Photomultipliers (SiPM) as novel photodetectors for PET
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DOI：
10.1016/j.nima.2010.11.128
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发表时间：
2011-08
影响因子：
1.4
通讯作者：
A. Guerra;N. Belcari;M. G. Bisogni;F. Corsi;M. Foresta;P. Guerra;S. Marcatili;Andrés Santos;
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文献类型：
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作者：
A. Guerra;N. Belcari;M. G. Bisogni;F. Corsi;M. Foresta;P. Guerra;S. Marcatili;Andrés Santos;
下一代 PET 扫描仪应在空间、能量和时间分辨率方面满足非常高的要求。现代扫描仪的性能本质上受到标准光电倍增管的使用的限制。建议使用硅光电倍增管 (SiPM) 构建 4.8×4.8cm2 的 4D-PET 模块，旨在取代基于标准 PMT 的 PET 块检测器。该模块将基于通过硅光电倍增器在两个面上读取的 LYSO 连续晶体。由 1.5mm 间距的 SiPM 矩阵制成的高粒度检测表面将用于以亚毫米精度确定 x-y 光子撞击位置，而由 16mm2SiPM 像素构成的低粒度表面将提供快速定时信息 (t)，用于实现飞行时间技术 (TOF)。两个探测器层收集的空间信息将被组合起来，以测量每个事件 (z) 的交互深度 (DOI)。使用大面积多像素硅光电倍增管 (SiPM) 探测器需要开发多通道数字采集系统 (DAQ) 以及专用前端，以免降低探测器的固有功能并管理多个通道。本文介绍了比萨大学正在建设的原理证明模块的开发进展。
Next generation PET scanners should fulfill very high requirements in terms of spatial, energy and timing resolution. Modern scanner performances are inherently limited by the use of standard photomultiplier tubes. The use of Silicon Photomultipliers (SiPMs) is proposed for the construction of a 4D-PET module of 4.8×4.8cm2aimed to replace the standard PMT based PET block detector. The module will be based on a LYSO continuous crystal read on two faces by Silicon Photomultipliers. A high granularity detection surface made by SiPM matrices of 1.5mm pitch will be used for the x–y photon hit position determination with submillimetric accuracy, while a low granularity surface constituted by 16mm2SiPM pixels will provide the fast timing information (t) that will be used to implement the Time of Flight technique (TOF). The spatial information collected by the two detector layers will be combined in order to measure the Depth of Interaction (DOI) of each event (z). The use of large area multi-pixel Silicon Photomultiplier (SiPM) detectors requires the development of a multichannel Digital Acquisition system (DAQ) as well as of a dedicated front-end in order not to degrade the intrinsic detector capabilities and to manage many channels. The paper describes the progress made on the development of the proof of principle module under construction at the University of Pisa.