Design and research of an improved radiosurgical collimator

ZHOU Yun; CHEN Weihai; LIU Yongbiao; YAN Nan; SUN Xiangshang; LIAO Wentao; LIU Junya; PU Yuehu

doi:10.11889/j.1000-3436.2022-0142

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Design and research of an improved radiosurgical collimator

RADIOBIOLOGY AND RADIOMEDICINE | 更新时间：2023-06-21

- Design and research of an improved radiosurgical collimator
- Journal of Radiation Research and Radiation Processing Vol. 41, Issue 3, Pages: 30304(2023)
- 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：
  
  ZHOU Yun (male) was born in June 1984, and graduated from China University of Mining and Technology with a master’s degree in 2008. Now he is studying at University of Chinese Academy of Sciences as a doctoral student
  PU Yuehu, professor, E-mail: puyuehu@163.com
- 基金信息：
  
  National Key Research and Development Program(2016YFCO105408)
- DOI：10.11889/j.1000-3436.2022-0142
  CLC：
扫描看全文
ZHOU Yun, CHEN Weihai, LIU Yongbiao, et al. Design and research of an improved radiosurgical collimator. [J]. Journal of Radiation Research and Radiation Processing 41(3):030304(2023)
DOI：

ZHOU Yun, CHEN Weihai, LIU Yongbiao, et al. Design and research of an improved radiosurgical collimator. [J]. Journal of Radiation Research and Radiation Processing 41(3):030304(2023) 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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