Traceable point-like 68Ge/68Ga source with a spherically symmetric positron absorber for PET scanners

Traceable point-like 68Ge/68Ga source with a spherically symmetric positron absorber for PET scanners
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用于 PET 扫描仪的具有球对称正电子吸收体的可追踪点状 68Ge/68Ga 源

DOI:
10.1007/s12194-020-00565-4
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发表时间:
2020
影响因子:
1.6
通讯作者:
Y. Inoue
Y. Inoue
中科院分区:
--
文献类型:
--
作者:
T. Hasegawa;Mio Okamoto;T. Yamadac;H. Ishizud;T. Mikamotod;Y. Satoe;H. Miyatakef;K. Kikuchif;Y. Inoue

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开发了一种新型可追踪点状 68Ge/68Ga 源,用于校准正电子发射断层扫描 (PET) 扫描仪。该源配备有球对称丙烯酸正电子吸收器。考虑到可能的几何不确定性,通过蒙特卡罗模拟评估了点状源发射的光子的物理特性。作为点状源的实际应用,使用四个制造的点状源评估了临床 PET/CT 扫描仪的校准系数。结果与传统交叉校准方法测定的结果一致。可追踪的点状68Ge/68Ga源有望成为确定校准因子和评估PET扫描仪物理特性的简单实用的工具。
A novel traceable point-like68Ge/68Ga source was developed for calibration of positron emission tomography (PET) scanners. The source was equipped with a spherically symmetric acrylic positron absorber. The physical characteristics of photons emitted from the point-like source were evaluated by Monte Carlo simulation, considering possible geometrical uncertainties. The calibration factor of a clinical PET/CT scanner was evaluated using four manufactured point-like sources as a practical application of the point-like source. The results were consistent with that determined by the conventional cross-calibration method. The traceable point-like68Ge/68Ga source is expected to be a simple and practical tool for determining the calibration factor and evaluating the physical characteristics of PET scanners.
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