PET Detectors Based on Multi-Resolution SiPM Arrays

IF 4.6 Q1 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING IEEE Transactions on Radiation and Plasma Medical Sciences Pub Date : 2024-03-26 DOI:10.1109/TRPMS.2024.3381865
Jiahao Xie;Haibo Wang;Simon R. Cherry;Junwei Du
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Abstract

Almost all high spatial resolution positron emission tomography (PET) detectors based on pixelated scintillator arrays utilize crystal arrays with smaller pitches than photodetector arrays, leading to challenges in resolving edge crystals. To address this issue, this article introduces a novel multi-resolution silicon photomultiplier (SiPM) array design aimed at decreasing the number of readout channels required while maintaining the crystal resolvability of the detector, especially for edge crystals. The performance of a pseudo $9\times9$ multi-resolution SiPM array, consisting of $6.47\times6.47$ mm 2, $6.47\times3.07$ mm 2, and $3.07\times3.07$ mm2 SiPMs, was compared to those of a pseudo $8\times8$ SiPM array with a 6.8-mm pitch, and a $16\times16$ SiPM array with a 3.4-mm pitch using a $36\times36$ LYSO array with a pitch of 1.5 mm. The large-size pseudo SiPMs were implemented by digitally grouping multiple $3.07\times3.07$ mm2 SiPMs. The flood histograms show that the edge crystal resolvability of the pseudo $9\times9$ multi-resolution SiPM array is comparable to that of the $16\times16$ SiPM array and is significantly better than that of the $8\times8$ SiPM array.
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基于多分辨率 SiPM 阵列的 PET 探测器
几乎所有基于像素化闪烁体阵列的高空间分辨率正电子发射断层扫描(PET)探测器都采用了比光电探测器阵列间距更小的晶体阵列,这就给分辨边缘晶体带来了挑战。为解决这一问题,本文介绍了一种新型多分辨率硅光电倍增管(SiPM)阵列设计,旨在减少所需的读出通道数量,同时保持探测器的晶体分辨能力,尤其是对边缘晶体的分辨能力。一个由 6.47 美元/次 6.47 美元 mm 2、6.47 美元/次 3.07 美元 mm 2 和 3.07 美元/次 3.07 美元 mm 2 硅光电倍增管组成的伪 9 美元/次 9 美元多分辨率硅光电倍增管阵列的性能,以及该阵列的读出通道数量。与间距为 6.8 毫米的 8(times8)美元伪 SiPM 阵列和间距为 3.4 毫米的 16(times16)美元 SiPM 阵列以及间距为 1.5 毫米的 36(times36)美元 LYSO 阵列进行了比较。大尺寸伪 SiPM 是通过对多个 3.07times3.07mm2 SiPM 进行数字分组实现的。泛光直方图显示,9(times9)美元伪多分辨率 SiPM 阵列的边缘晶体分辨能力与 16(times16)美元 SiPM 阵列相当,明显优于 8(times8)美元 SiPM 阵列。
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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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