Sub-voxel identification of gamma-ray interaction positions within a pixelated CZT detector through signal analysis
Sub-voxel identification of gamma-ray interaction positions within a pixelated CZT detector through signal analysis
复制标题
通过信号分析对像素化 CZT 探测器内的伽马射线相互作用位置进行亚体素识别
DOI:
10.1016/j.nima.2022.167639
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Rintoul E
中科院分区:
文献类型:
--
作者:
Rintoul E
Cadmium zinc telluride (CZT) detectors are well suited for use in gamma-imaging applications thanks to their room-temperature operation, excellent energy resolution, and three-dimensional sensitivity to positions of gamma-ray interactions. In many of these applications, the position resolution with which gamma-interactions can be determined is crucial for high quality imaging. Finer pixelisation may provide improved position resolution but at the cost of increased fabrication cost and degradation of spectral performance. This work sets out to instead investigate and quantify the three-dimensional position resolution achievable using pulse shape analysis applied to digital signals, arising from interactions in a CZT detector pixelated into 2× 2× 5 mm 3 voxels. The signal response of a 3× 3 pixel cluster has been characterised as a function of gamma-ray interaction position using collimated 57 Co and 137 Cs sources. Simple pulse shape analysis algorithms using the transient image and charge collection signals have been developed and applied to achieve a sub-voxel position resolution of better than 0.65× 0.69× 1.26 mm 3 at 122 keV and of 1.06 mm through 5 mm depth at 662 keV, not accounting for divergence of the collimated beam used to evaluate performance. Assessment of the contribution of the diverging gamma-beam placed a lower bound on the achievable positions resolution in 5 mm thickness at 122 keV of 290 μ m.
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影响因子:
1.8
作者:
Yuefeng Zhu;S. Anderson;Zhong He
通讯作者:
Zhong He
DOI:
--
发表时间:
2000
期刊:
影响因子:
--
作者:
K. Vetter;A. Kuhn;M. Deleplanque;I. Lee;F. Stephens;G. Schmid;D. Beckedahl;J. Blair;R. Clark;M. Cromaz;R. Diamond;P. Fallon;G. Lane;J. Kammeraad;A. Macchiavelli;C. Svensson
通讯作者:
C. Svensson
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
Xiaoqing Zheng;Zeng Cheng;M. Deen;Hao Peng
通讯作者:
Hao Peng
影响因子:
1.8
作者:
Allwork C
通讯作者:
Allwork C
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
P. Födisch;M. Berthel;B. Lange;T. Kirschke;W. Enghardt;P. Kaever
通讯作者:
P. Kaever