Development of dosimetry for brachytherapy? toward improvement of precision by regression of Monte Carlo simulation to in-vivo measurement

用玻璃棒剂量计验证了I^<125> x射线的剂量测量方法。还验证了使用计算的剂量学，其中根据源强度与测量剂量的回归对其进行了校正。作为一种计算方法，将代码“EGS5”与待输入的源结构组合，通过与实测值的对比进行验证。剂量学方法的精度还有待提高，但经过验证的计算方法适用于分析源的剂量学性质。同时，验证的测量方法也适用于其他类型辐射源的剂量测定。这项研究仍在进行中。此外，还验证了实时估计被植入源强度的可行性。

A dose measurement method for I^<125> X-ray was validated using glass rod dosimeters. A dosimetry using calculations was also validated, in which the source strength was corrected based on its regression to the measured dose. As a calculation method for this purpose, the combination of the code "EGS5" and the source structure to be input was verified by comparison to the measured values. The dosimetry method still needs improvement in accuracy, however, the validated calculation method is applicable to analyzing the dosimetric properties of the sources. Also, the validated measurement method is applicable to develop this dosimetry for other type of the sources. The research is still ongoing. Furthermore, the real-time estimation of the strength of the source being implanted was demonstrated as to its feasibility.