In vivo measurement of radiotherapeutic doses is an important procedure for ensuring the accuracy of radiation treatments. The glass rod dosimeter is a known dosimeter for in vivo dosimetry, which has high reproducibility and low dependencies with respect to major radiotherapeutic conditions. A hemispherical buildup cap made of brass was fabricated to avoid a large measurement error owing to the partial lack of buildup effect during the measurement on the patient's skin. The correction factors (CFs) were experimentally obtained and verified using a Monte Carlo simulation. A clinical trial was performed with 117 patients. As a result, the measured CF was consistent with the simulation by a 2.3% error, and the mean errors of each site were within 2%. The total mean error was 1.84%, with a standard deviation of 1.39%. To conclude, this methodology can provide high accuracy and convenience in radiotherapeutic in vivo measurements.

体内放射治疗剂量的测量是确保放射治疗准确性的重要程序。玻璃棒剂量计是用于体内剂量测定的已知剂量计，其相对于主要放射治疗条件具有高再现性和低依赖性。为了避免由于在患者皮肤上的测量过程中部分缺乏堆积效应而制造的半球形堆积帽，从而避免了大的测量误差。实验获得了校正因子（CFs），并使用蒙特卡洛模拟进行了验证。117名患者进行了临床试验。结果，测得的CF与模拟结果相符，误差为2.3％，每个位置的平均误差均在2％以内。总平均误差为1.84％，标准偏差为1.39％。总而言之，