Qin Zhuang, Chen Ziyin, He Bo, Sun Weimin, Gao Yachen
School of Electronic Engineering, Heilongjiang University, Harbin 150080, China.
Comprehensive Cancer Center, First Affiliated Hospital of Harbin Medical University, Harbin 150001, China.
Sensors (Basel). 2025 Jul 8;25(14):4243. doi: 10.3390/s25144243.
Over the past few decades, electron beams have been widely used to treat malignant and benign tumors located in the superficial regions of patients. This study utilized an inorganic scintillator (GdOS:Tb)-based radiation detector to test its response characteristics in an electron-beam radiotherapy environment, in order to determine the application potential of this detector in electron-beam therapy. Owing to the extremely high time resolution of this inorganic scintillator detector (ISD), it is even capable of measuring the pulse information of electron beams generated by the accelerator. The results indicate that for certain accelerator models, such as the IX3937, the pulse pattern of the output electron beam is notably different from that during the output of X-rays, showing no significant periodicity. The experimental results also demonstrate that this ISD exhibits excellent repeatability and dose linearity (R of 0.9993) when measuring electron beams. Finally, the PDD (Percentage Depth Dose) curves and OAR (Off-Axis Ratio) curves of the ISD were also tested under electron-beam conditions at 6 MeV and 9 MeV, respectively.
在过去几十年中，电子束已被广泛用于治疗患者体表区域的恶性和良性肿瘤。本研究利用基于无机闪烁体（GdOS:Tb）的辐射探测器，在电子束放射治疗环境中测试其响应特性，以确定该探测器在电子束治疗中的应用潜力。由于这种无机闪烁体探测器（ISD）具有极高的时间分辨率，它甚至能够测量加速器产生的电子束的脉冲信息。结果表明，对于某些加速器型号，如IX3937，输出电子束的脉冲模式与X射线输出时明显不同，没有明显的周期性。实验结果还表明，该ISD在测量电子束时表现出优异的重复性和剂量线性（R为0.9993）。最后，还分别在6 MeV和9 MeV的电子束条件下测试了ISD的百分深度剂量（PDD）曲线和离轴比（OAR）曲线。
