Broadcom金属沟槽硅光电倍增管的时序性能

IF 4.6 Q1 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
Seungeun Lee;Woon-Seng Choong;Ryan Heller;Joshua W. Cates
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引用次数: 0

摘要

考虑到飞行时间正电子发射层析成像(TOF-PET)技术的进步,单光子时间分辨率(SPTR)、光子探测效率(PDE)和相关噪声率是现代硅光电倍增管(SiPMs)的重要性能特征。市售的Broadcom近紫外金属沟槽(NUV-MT) sipm采用金属填充沟槽技术来抑制光串扰。本文研究了采用低噪声高频读出电子器件的不同尺寸和不同闪烁晶体的NUV-MT SiPMs可实现的SPTR和符合时间分辨率(CTR)。利用皮秒脉冲激光装置估计了$2\ × 2$、$4\ × 4$和$6\ × 6$ -mm2器件的可实现的内在sptr。2 mm和4 mm SiPMs与2\ × 2\ × 3$ mm3和3\ × 3\ × 20$ -mm3 LGSO和BGO晶体耦合,以评估可实现的CTRs。在48 V偏置下,2-、4-和6-mm SiPMs的本征sptr分别为45、55和137 ps,全宽半最大(FWHM)。该检测器由一个2 mm SiPM和一个2\ × 2\ × 3$ -mm3 BGO组成,实现了111-ps CTR FWHM。结果表明,与基于闪烁的事件相比,2-mm SiPM的优越SPTR对切伦科夫事件部分有显著影响。NUV-MT的抑制噪声使其在高偏置电压下稳定运行,为TOF-PET探测器的时间分辨率突破提供了出色的SPTR和PDE。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Timing Performance With Broadcom Metal Trench Silicon Photomultipliers
Single photon time resolution (SPTR), photon detection efficiency (PDE), and correlated noise rate are important performance characteristics of modern silicon photomultipliers (SiPMs) in consideration of advances in time-of-flight positron emission tomography (TOF-PET). Commercially available Broadcom near-ultraviolet metal-trench (NUV-MT) SiPMs feature metal-filled trench technology to suppress optical crosstalk. We investigated the achievable SPTR and coincidence time resolution (CTR) of NUV-MT SiPMs with various sizes and scintillation crystals, employing low-noise high-frequency readout electronics. The achievable intrinsic SPTRs of $2\times 2$ , $4\times 4$ , and $6\times 6$ -mm2 devices were estimated using a picosecond-pulse laser setup. 2- and 4-mm SiPMs were coupled with $2\times 2\times 3$ mm3 and $3\times 3\times 20$ -mm3 LGSO and BGO crystals to assess achievable CTRs. The intrinsic SPTRs of 2-, 4-, and 6-mm SiPMs biased with 48 V were estimated to be 45, 55, and 137 ps in full width at half maximum (FWHM), respectively. The detector comprised a 2-mm SiPM and a $2\times 2\times 3$ -mm3 BGO achieved 111-ps CTR FWHM. The results demonstrated a significant influence of superior SPTR of 2-mm SiPM for the Cherenkov event portion compared to scintillation-based events. The suppressed noise of NUV-MT enabled stable operation at high-bias voltage, offering excellent SPTR and PDE for breakthroughs in the timing resolution of TOF-PET detectors.
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来源期刊
IEEE Transactions on Radiation and Plasma Medical Sciences
IEEE Transactions on Radiation and Plasma Medical Sciences RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING-
CiteScore
8.00
自引率
18.20%
发文量
109
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