一种改进型放射外科准直器的设计和研究
Design and research of an improved radiosurgical collimator
- 辐射研究与辐射工艺学报 2023年41卷第3期 页码：30304
- 作者机构：
1.中国科学院上海应用物理研究所 上海 201800
2.中国科学院大学 北京 100049
3.四川大学华西医院医学装备创新研究中心 成都 610041
4.（太丛信息科技（上海）有限公司 上海 200233）
5.南京迈丛医疗科技有限公司 南京 210023
6.江苏省人民医院肿瘤放射治疗科 南京 210029
7.湖南省肿瘤医院放射物理技术部 长沙 410013
- 作者简介：
周云，男，1984年6月出生，2008年硕士毕业于中国矿业大学，目前为中国科学院博士研究生在读
薄越虎，教授，E-mail: puyuehu@163.com
- 基金信息：国家重点研发计划项目(2016YFCO105408)
DOI：10.11889/j.1000-3436.2022-0142
中图分类号：
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周云, 陈蔚海, 刘永彪, 等. 一种改进型放射外科准直器的设计和研究[J]. 辐射研究与辐射工艺学报, 2023,41(3):030304.
ZHOU Yun, CHEN Weihai, LIU Yongbiao, et al. Design and research of an improved radiosurgical collimator[J]. Journal of Radiation Research and Radiation Processing, 2023,41(3):030304.
周云, 陈蔚海, 刘永彪, 等. 一种改进型放射外科准直器的设计和研究[J]. 辐射研究与辐射工艺学报, 2023,41(3):030304. DOI： 10.11889/j.1000-3436.2022-0142.
ZHOU Yun, CHEN Weihai, LIU Yongbiao, et al. Design and research of an improved radiosurgical collimator[J]. Journal of Radiation Research and Radiation Processing, 2023,41(3):030304. DOI： 10.11889/j.1000-3436.2022-0142.
摘要
本文基于Hygeia公司GMX-1型钴（,60,Co）放射外科系统，采用蒙特卡罗模拟程序GEANT4设计了一款新型准直器并进行了实测分析。该准直器在锥形通孔内置锥形环孔聚焦结构。EBT3胶片测量结果表明，在放射源活度、源轴距、射野尺寸等保持不变的条件下，该改进型准直器的射野半影比原来减小17.6%，吸收剂量率是原来的2.12倍。该改进型准直器在中心点吸收剂量率、射野半影两个关键技术参数上具有显著优势。
Abstract
In this paper, a new collimator based on Hygeia GMX-1 cobalt (,60,Co) radiosurgery system was designed and analyzed using the Monte Carlo simulation program GEANT4. The results of EBT3 film measurements showed that the field penumbra of the improved collimator was reduced by 17.6% and the absorbed dose rate was 2.12 times higher, while the source activity, source axis distance and field size remained unchanged. The collimator has significant advantages in the two key technical parameters of absorbed dose rate and penumbra.
关键词
放射治疗准直器剂量率射野半影
Keywords
RadiotherapyCollimatorDose ratePenumbra
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