Lyu Jun, Chen Liuli, Wen Ruijun, Long Pengcheng, Shang Leiming, Hu Liqin
Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031.
University of Science and Technology of China, Hefei, 230026.
Zhongguo Yi Liao Qi Xie Za Zhi. 2023 Jul 30;47(4):377-382. doi: 10.3969/j.issn.1671-7104.2023.04.005.
Dynamic multi-leaf collimator, which has the function of radiation beam shaping, is a key executive component of tumor precise radiotherapy, and plays a core role in improving the accuracy, efficiency and quality of radiotherapy. A new type of collimator leaf end structure with circular arc and plane combination was studied, and collimator penumbra performance analysis model combining analytical expression and graphic analysis was developed. The influence of leaf end structure on penumbra was analyzed quantitatively, and a set of three-dimensional structure design of dynamic multi-leaf collimator was completed. The feasibility of the structural design and analysis model was verified through experimental measurements.
动态多叶准直器具有辐射束整形功能，是肿瘤精确放疗的关键执行部件，在提高放疗的精度、效率和质量方面发挥着核心作用。研究了一种新型的圆弧与平面组合的准直器叶片端部结构，并建立了结合解析表达式和图形分析的准直器半影性能分析模型。定量分析了叶片端部结构对半影的影响，完成了一套动态多叶准直器的三维结构设计。通过实验测量验证了结构设计和分析模型的可行性。
