Optimizing timing performance of silicon photomultiplier-based scintillation detectors.
Optimizing timing performance of silicon photomultiplier-based scintillation detectors.
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DOI：
10.1088/0031-9155/58/4/1207
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发表时间：
2013-02-21
影响因子：
3.5
通讯作者：
Levin CS
中科院分区：
文献类型：
--
作者：
Yeom JY;Vinke R;Levin CS
精确的定时分辨率对于需要光子飞行时间（ToF）信息的应用（例如ToF正电子发射断层扫描（PET））至关重要。众所周知，用于PET的硅光电倍增管（SiPM）具有高输出电容，需要定制前置放大器来优化时序性能。在本文中，我们描述了一个简单的替代前端电子的基础上，商业低噪声射频放大器和方法，已实施，以实现出色的时序分辨率。两个辐射探测器与L（Y）SO振荡器耦合到滨松SiPM（MPPC S10362-33- 050 C）和前端电子的基础上的RF放大器（MAR-3SM+），通常用于无线应用，需要最少的额外电路，已经制造。这些探测器被用来探测来自Ge-68源的湮灭光子，并且输出信号随后由高速示波器数字化以用于离线处理。用3 × 3 × 5 mm ~ 3和3 × 3 × 20 mm ~ 3的LYSO晶体元件分别测量了147 ± 3 ps和186 ± 3 ps的符合分辨时间（CRT）。采用较小的2 × 2 × 3 mm ~ 3 LSO晶体，CRT的FWHM为125 ± 2 ps，在较低温度（15°C）下略有提高，为121 ± 3 ps。最后，与20 mm长的晶体，观察到的时间分辨率的退化的湮没光子相互作用发生在靠近光传感器相比，浅的相互作用深度（DOI）。我们的结论是，商业RF放大器优化的噪声，除了他们的易用性，可以产生出色的定时分辨率相比，最好的报告值与自定义读出电子设备。另一方面，由于定时性能随着光子DOI的增加而降低，因此对于较长的晶体，正面探测器配置将产生比侧面照射设置更好的CRT。
Precise timing resolution is crucial for applications requiring photon time-of-flight (ToF) information such as ToF positron emission tomography (PET). Silicon photomultipliers (SiPM) for PET, with their high output capacitance, are known to require custom preamplifiers to optimize timing performance. In this paper, we describe simple alternative front-end electronics based on a commercial low-noise RF preamplifier and methods that have been implemented to achieve excellent timing resolution. Two radiation detectors with L(Y)SO scintillators coupled to Hamamatsu SiPMs (MPPC S10362–33-050C) and front-end electronics based on an RF amplifier (MAR-3SM+), typically used for wireless applications that require minimal additional circuitry, have been fabricated. These detectors were used to detect annihilation photons from a Ge-68 source and the output signals were subsequently digitized by a high speed oscilloscope for offline processing. A coincident resolving time (CRT) of 147 ± 3 ps FWHM and 186 ± 3 ps FWHM with 3 × 3 × 5 mm3 and with 3 × 3 × 20 mm3 LYSO crystal elements were measured, respectively. With smaller 2 × 2 × 3 mm3 LSO crystals, a CRT of 125 ± 2 ps FWHM was achieved with slight improvement to 121 ± 3 ps at a lower temperature (15°C). Finally, with the 20 mm length crystals, a degradation of timing resolution was observed for annihilation photon interactions that occur close to the photosensor compared to shallow depth-of-interaction (DOI). We conclude that commercial RF amplifiers optimized for noise, besides their ease of use, can produce excellent timing resolution comparable to best reported values acquired with custom readout electronics. On the other hand, as timing performance degrades with increasing photon DOI, a head-on detector configuration will produce better CRT than a side-irradiated setup for longer crystals.
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DOI：
10.1016/j.nima.2006.05.060
发表时间：
2006-11-01
影响因子：
1.4
作者：
Renker, D.
通讯作者：
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DOI：
10.1016/j.nima.2006.05.072
发表时间：
2006-11-01
影响因子：
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作者：
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影响因子：
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DOI：
10.1016/j.nima.2010.07.008
发表时间：
2011-02-01
影响因子：
1.4
作者：
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