Physical Properties of LYSO Scintillator for NN-PET Detectors

2009 2nd International Conference on Biomedical Engineering and Informatics Pub Date : 2009-10-30 DOI:10.1109/BMEI.2009.5305107

Junwei Du, Yonggang Wang, Lijun Zhang, Zhong-qiu Zhou, Zizhong Xu, Xiaolian Wang

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引用次数: 17

Abstract

Cerium doped lutetium oxyorthosilicate scintillators, such as LYSO, which possess high stopping power, high light output and fast decay time, are promising candidates for use in positron emission tomography. In this paper, the luminescence and nuclear spectroscopic properties of two LYSO samples, used in the NN-PET detectors, are studied. UV-excited emission spectra show that maximum emission spectral values are within the range of 400-425nm, which is well compatible with spectral response of PMT H7546B. The decay time, energy resolution, light output and energy spectra related to coincidence time window were investigated. The decay times of the two LYSO samples are 34.16±1.43ns, 34.26±1.95ns, respectively. The energy resolution and the light output, relative to NaI(Tl), are 10.25%±0.06%, 10.17%±0.10% and 75.3±5.7, 76.1±5.8 respectively when detected with PMT XP2262B. The energy spectra change obviously with coincidence time window and coincidence energy resolution is 14% when obtained using coincidence detector based on LYSO and H7546B. Keywords-LYSO;Decay time;Energy resolution;Light output; Energy spectra;

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用于NN-PET探测器的LYSO闪烁体的物理性质

掺杂铈的氧化硅酸镥闪烁体，如LYSO，具有高阻挡功率，高光输出和快速衰减时间，是正电子发射断层成像的有希望的候选者。本文研究了用于NN-PET探测器的两种LYSO样品的发光和核光谱特性。紫外激发发射光谱显示，PMT H7546B的最大发射光谱值在400 ~ 425nm范围内，与PMT H7546B的光谱响应吻合较好。研究了衰减时间、能量分辨率、光输出和与符合时间窗相关的能谱。两种LYSO样品的衰减时间分别为34.16±1.43ns、34.26±1.95ns。用PMT XP2262B检测时，相对于NaI(Tl)的能量分辨率和光输出分别为10.25%±0.06%、10.17%±0.10%和75.3±5.7、76.1±5.8。采用LYSO和H7546B型符合检测器获得的能谱随符合时间窗变化明显，符合能量分辨率为14%。衰减时间;能量分辨率;光输出;能量谱;

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2009 2nd International Conference on Biomedical Engineering and Informatics

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