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| 高剂量率近距离192Ir治疗源的井型电离室仪器的校准 | |
| 引用本文： | 王继,吴钦宏,赵亮,吕雅竹,王军良,杨小元,王培玮. 高剂量率近距离192Ir治疗源的井型电离室仪器的校准[J]. 计量学报, 2021, 42(9): 1232-1236. DOI: 10.3969/j.issn.1000-1158.2021.09.18 |
| 作者姓名： | 王继 吴钦宏 赵亮 吕雅竹 王军良 杨小元 王培玮 |
| 作者单位： | 中国计量科学研究院,北京100029;北京医院放疗科,北京100730;中国人民解放军总医院第五医学中心,北京100071 |
| 摘 要： | 针对后装治疗用192 IF放射源的参考空气比释动能率的量值急需进行溯源.参考国际通例,由指型电离室(PTW-30013)在60Coγ射线和250 kV X射线下的空气比释动能校准因子推导得出192Ir γ射线的空气比释动能校准因子,从而测定192Ir放射源参考空气比释动能率标准值,进而完成对井型电离室的参考空气比释动能... |
| 关 键 词： | 计量学 参考空气比释动能率 近距离放射治疗 192Ir放射源 井型电离室 |
| 收稿时间： | 2019-10-28 |
Calibration of Well Type Ionization Chamber Instruments with High-dose-rate After-loading 192Ir Source |
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| WANG Ji,WU Qin-hong,ZHAO Liang,L Ya-zhu,WANG Jun-liang,YANG Xiao-yuan,WANG Pei-wei. Calibration of Well Type Ionization Chamber Instruments with High-dose-rate After-loading 192Ir Source[J]. Acta Metrologica Sinica, 2021, 42(9): 1232-1236. DOI: 10.3969/j.issn.1000-1158.2021.09.18 | |
| Authors: | WANG Ji WU Qin-hong ZHAO Liang L Ya-zhu WANG Jun-liang YANG Xiao-yuan WANG Pei-wei |
| Affiliation: | 1. National Institute of Metrology, Beijing 100029, China 2. Department of Radiation Oncology of Beijing Hospital, Beijing 100730, China 3. Fifth Medical Center of PLA General Hospital, Beijing 100071, China |
| Abstract: | There is an urgent need for traceability of the reference air kerma rate for the 192Ir source for high-dose-rate after-loading. Referring to the international general practice, the calibration factor of the 192Ir gamma ray is derived from the calibration factor of air kerma of finger ionization chamber under 60Co gamma ray and 250kV X-ray, so as to determine the standard value of the 192Ir gamma ray reference air kerma rate, and then the calibration of reference air kerma rate of well type ionization chamber is completed. The results show that the uncertainty of the 192Ir gamma ray reference air kerma rate is 3.6%, and that of calibration factor of well type ionization chamber is 3.8%. |
| Keywords: | metrology reference air kerma rate brachytherapy 192Ir source well type ionization chamber |
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