使用GATE软件包估算J-PET断层扫描仪的NEMA特性
仪器与探测器
2018-08-02 v1
摘要
基于塑料闪烁体的新型全身PET系统由{J-PET}合作组开发。它由轴向排列成圆柱形的塑料闪烁体条构成，可实现具成本效益的全身PET构建。为确定扫描仪原型的特性并优化其几何结构，使用GATE软件进行了先进的计算机模拟。根据NEMA规范，估算了空间分辨率、灵敏度、散射分数与噪声等效计数率随断层扫描仪长度、探测层数目、断层扫描室直径以及各类所采用读出方式的函数关系。对于直径85 cm、条长100 cm、截面4 mm x 20 mm且以带额外波长移位层硅光电倍增管作为读出的单层几何，扫描仪中心处的空间分辨率（FWHM）为3 mm（径向、切向）与6 mm（轴向）。对于采用相同读出、直径与闪烁体长度的类似双层几何，条截面为7 mm x 20 mm，NECR峰值在40 kBq/cc活度浓度处达300 kcps，散射分数估计约35%，中心灵敏度达14.9 cps/kBq。同时也确定了灵敏度曲线。
引用
@article{arxiv.1808.00241,
title = {Estimating the NEMA characteristics of the J-PET tomograph using the GATE package},
author = {Paweł Kowalski and Wojciech Wiślicki and Roman Shopa and Lech Raczyński and Konrad Klimaszewski and Catalina Curceanu and Eryk Czerwiński and Kamil Dulski and Aleksander Gajos and Marek Gorgol and Neha Gupta-Sharma and Beatrix Hiesmayr and Bożena Jasińska and Łukasz Kapłon and Daria Kamińska and Grzegorz Korcyl and Tomasz Kozik and Wojciech Krzemień and Ewelina Kubicz and Muhsin Mohammed and Szymon Niedzwiecki and Marek Pałka and Monika Pawlik-Niedźwiecka and Juhi Raj and Kamil Rakoczy and Zbigniew Rudy and Sushil Sharma and Shivani Shivani and Michał Silarski and Magdalena Skurzok and Bożena Zgardzińska and Marcin Zielinski and Paweł Moskal},
journal= {arXiv preprint arXiv:1808.00241},
year = {2018}
}