Performance evaluation of dual-ended readout PET detectors based on BGO arrays with different reflector arrangements.
Performance evaluation of dual-ended readout PET detectors based on BGO arrays with different reflector arrangements.
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基于不同反射面布置的BGO阵列双端读出PET探测器的性能评价。
DOI：
10.1088/1361-6560/ac2c9c
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发表时间：
2021-10-19
影响因子：
3.5
通讯作者：
Cherry SR
中科院分区：
文献类型：
--
作者：
Du J;Wang Q;Liu CC;Qi J;Cherry SR
基于锗酸铋 (BGO) 闪烁晶体阵列的双端读出深度编码探测器是用于极低剂量成像的高灵敏度小动物正电子发射断层扫描 (PET) 的良好候选者。本文对基于具有三种不同反射器排列的 15 × 15 BGO 阵列和 8 × 8 硅光电倍增管 (SiPM) 阵列的三个双端读出探测器的性能进行了评估和比较。三个 BGO 阵列分别表示为 wo-ILG（无内部光导）、wp-ILG（具有部分内部光导）和 wf-ILG（具有完整内部光导），其间距尺寸为 1.6 mm，厚度为 20 mm。使用厚度为50μm的东丽E60作为晶间反射器。 wo-ILG 和 wf-ILG BGO 阵列中的所有反射器长度分别为 20 和 18 mm； wp-ILG BGO 阵列中的反射器在阵列中心区域为 18 毫米，在边缘为 20 毫米。通过使用 18mm 反射器，wp-ILG 和 wf-ILG BGO 阵列中的部分晶体充当内部光导。结果表明，基于wo-ILG BGO阵列的探测器提供了最佳的洪水直方图。三个探测器的能量、定时和 DOI 分辨率相似。基于 wo-ILG、wp-ILG 和 wf-ILG BGO 阵列的能量分辨率（FWHM 值）分别为 27.2 ± 3.9 %、28.7 ± 4.6 % 和 29.5 ± 4.7 %。时序分辨率（FWHM 值）分别为 4.7 ± 0.5 ns、4.9 ± 0.5 ns 和 5.0 ± 0.6 ns。 DOI 分辨率（FWHM 值）分别为 3.0 ± 0.2 mm、2.9 ± 0.2 mm 和 3.0 ± 0.2 mm。总体而言，wo-ILG 探测器提供了最佳性能。
Dual-ended readout depth-encoding detectors based on bismuth germanate (BGO) scintillation crystal arrays are good candidates for high-sensitivity small animal positron emission tomography (PET) used for very-low-dose imaging. In this paper, the performance of three dual-ended readout detectors based on 15 × 15 BGO arrays with three different reflector arrangements and 8 × 8 silicon photomultiplier (SiPM) arrays were evaluated and compared. The three BGO arrays, denoted wo-ILG (without internal light guide), wp-ILG (with partial internal light guide), and wf-ILG (with full internal light guide), share a pitch size of 1.6 mm and thickness of 20 mm. Toray E60 with a thickness of 50 μm was used as inter-crystal reflector. All reflector lengths in the wo-ILG and wf-ILG BGO arrays were 20 and 18 mm, respectively; the reflectors in the wp-ILG BGO array were 18 mm at the central region of the array and 20 mm at the edge. By using 18mm reflectors, part of the crystals in the wp-ILG and wf-ILG BGO arrays worked as internal light guides. The results showed that the detector based on the wo-ILG BGO array provided the best flood histogram. The energy, timing and DOI resolutions of the three detectors were similar. The energy resolutions (FWHM value) based on the wo-ILG, wp-ILG and wf-ILG BGO arrays were 27.2 ± 3.9 %, 28.7 ± 4.6 %, and 29.5 ± 4.7 %, respectively. The timing resolutions (FWHM value) were 4.7 ± 0.5 ns, 4.9 ± 0.5 ns, and 5.0 ± 0.6 ns, respectively. The DOI resolution (FWHM value) were 3.0 ± 0.2 mm, 2.9 ± 0.2 mm, and 3.0 ± 0.2 mm, respectively. Over all, the wo-ILG detector provided the best performance.
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影响因子：
3.5
作者：
Du J;Bai X;Gola A;Acerbi F;Ferri A;Piemonte C;Yang Y;Cherry SR
通讯作者：
Cherry SR
影响因子：
3.5
作者：
Du, Junwei;Bai, Xiaowei;Cherry, Simon R.
通讯作者：
Cherry, Simon R.
DOI：
10.1016/j.ejmp.2013.04.001
发表时间：
2014-02-01
影响因子：
3.4
作者：
Freedenberg, Melissa I.;Badawi, Ramsey D.;Cherry, Simon R.
通讯作者：
Cherry, Simon R.
影响因子：
1.4
作者：
Kang, Han Gyu;Yamaya, Taiga;Hong, Seong Jong
通讯作者：
Hong, Seong Jong
影响因子：
2.8
作者：
Ouyang Y;Kim TJ;Pratx G
通讯作者：
Pratx G