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| 放射治疗机最佳适形多叶组合光栅叶片形状设计 | |
| 引用本文： | 侯建华,欧宗瑛,宋卫卫.放射治疗机最佳适形多叶组合光栅叶片形状设计[J].大连理工大学学报,2007,47(6):840-845. |
| 作者姓名： | 侯建华 欧宗瑛 宋卫卫 |
| 作者单位： | 1. 大连理工大学,精密与特种加工教育部重点实验室,辽宁,大连,116024 2. 大连理工大学,精密与特种加工教育部重点实验室,辽宁,大连,116024;大连理工大学,机械工程学院CAD&CG研究所,辽宁,大连,116024 3. 大连理工大学,机械工程学院CAD&CG研究所,辽宁,大连,116024 |
| 基金项目： | 国家高技术研究发展计划(863计划) |
| 摘 要： | 讨论了三维适形放射治疗中的多叶组合光栅叶片形状设计.根据放射治疗中剂量精确适形的要求,确定了多叶组合光栅叶片侧面的梯形聚焦形式和榫槽配合防漏射结构.使用遗传算法对叶片端面形状进行了优化设计,使端面产生的半影大小和一致性得以改善.针对几种典型的射野参数进行了设计计算,结果表明优化设计的端面形状在任何叶片位置所产生的半影接近于常数,设计的叶片形状可达到最佳剂量适形效果. |
| 关 键 词： | 放射治疗 适形 多叶组合光栅 半影 遗传算法 |
| 文章编号： | 1000-8608（2007）06-0840-06 |
| 收稿时间： | 2006-01-10 |
| 修稿时间： | 2007-09-29 |
Leaf shape design of multi-leaf collimator in radiotherapeutic machine for optimum conformation |
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| HOU Jian-hu,OU Zong-ying,SONG Wei-wei.Leaf shape design of multi-leaf collimator in radiotherapeutic machine for optimum conformation[J].Journal of Dalian University of Technology,2007,47(6):840-845. | |
| Authors: | HOU Jian-hu OU Zong-ying SONG Wei-wei |
| Abstract: | The leaf shape therapy was dealt with. design of multi-leaf collimator used in 3-dimensional conformal radiation According to the requirements of precision conformal dose delivery in radiation therapy, the focused trapezoid cross-sectional shape of the flank leaf of multi-leaf collimator is introduced, and the tongue-groove structure, which is used to minimize interleaf transmission, is determined. Genetic algorithm is utilized to optimize the leaf end shape to improve the size and uniformity of leaf-end penumbra. For several typical field sizes, the optimization is carried out. The result shows that the leaf-end penumbra keeps nearly constant in any leaf position. Optimum dose conformation can be realized by these leaf shape designs. |
| Keywords: | radiation therapy conform multi-leaf collimator penumbra genetic algorithm |
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