A side-by-side LYSO/GAGG phoswich detector aiming for SPECT imaging

A side-by-side LYSO/GAGG phoswich detector aiming for SPECT imaging
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用于 SPECT 成像的并排 LYSO/GAGG 磷光探测器

DOI:
10.1016/j.nima.2019.163242
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发表时间:
2020-02
期刊:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
影响因子:
--
通讯作者:
Liu Yaqiang
Liu Yaqiang
中科院分区:
其他
文献类型:
--
作者:
Wei Qingyang;Ma Tianyu;Jiang Nianming;Xu Tianpeng;Lyu Zhenlei;Hu Yulin;Liu Yaqiang

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单光子发射计算机断层扫描(SPECT)是一种有效的代谢和功能成像技术,在临床和临床前的应用。γ射线探测器是SPECT系统的关键部件。高质量SPECT成像需要高性能探测器。本文研制了一种由8× 8稀疏SiPM阵列读出的LYSO/GAGG并排阵列探测器。利用脉冲波形积分峰比鉴别磷硅单晶。进行了~(99)m Tc和~(57)Co源辐照实验。实验结果表明,使用简单的参数可以清楚地区分LYSO和GAGG。12× 12的LYSO和GAGG晶体阵列,晶体尺寸为1.35× 2。7× 7 mm 3可成功区分。12× 12 LYSO晶体和12× 12 GAGG晶体在140 keV处的平均能量分辨率分别为26.23%和21.29%。计算和实验结果表明,LYSO/GAGG并排式探测器具有较高的分辨率和灵敏度,适合于高性能SPECT系统。
Single photon emission computed tomography (SPECT) is an effective metabolic and functional imaging technique in both clinical and pre-clinical applications. Gamma-ray detector is a key component of a SPECT system. High performance detectors are required for high-quality SPECT imaging. In this paper, a detector using a side-by-side LYSO/GAGG phoswich array read out by a sparse 8× 8 SiPM array is developed. The phoswich crystals are discriminated using pulse waveform integration to peak ratio. A 99m Tc and a 57 Co source irradiation experiments were conducted. Results of the experiments demonstrate that the LYSO and GAGG can be clearly discriminated using the simple parameter. 12× 12 of both LYSO and GAGG crystal arrays with a crystal size of 1.35× 2. 7× 7 mm 3 could be successfully distinguished. The average energy resolutions@ 140 keV of 12× 12 LYSO crystals and 12× 12 GAGG crystals are 26.23% and 21.29%, respectively. The calculation and experiment verifies that the side-by-side LYSO/GAGG phoswich detector achieves relatively high resolution and high sensitivity which is suitable for high performance SPECT systems.
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