Testing of dynamic multileaf collimation
Testing of dynamic multileaf collimation
复制标题
DOI：
10.1118/1.597699
复制
发表时间：
1996-05-01
期刊：
影响因子：
3.8
通讯作者：
LoSasso, T
中科院分区：
文献类型：
--
作者：
Chui, CS;Spirou, S;LoSasso, T
事实证明，强度调制场有可能提供最佳剂量分布，即目标中的高剂量均匀性和周围关键器官中的较低剂量。提供此类场的一种方法是使用动态多叶准直 (DMLC)。此功能已在某些治疗机器的研究模式下可用。尽管人们在开发 DMLC 算法方面投入了大量精力，但这种新治疗模式的机械可靠性尚未得到充分研究。在这项工作中，我们报告了一系列旨在研究 DMLC 机械方面及其对剂量测定的影响的测试。具体来说，这些测试旨在检查（1）叶片速度的稳定性，（2）横向不平衡对相邻叶片之间剂量分布的影响，（3）叶片运动加速和减速的重要性，（4）位置精度和叶片圆端的影响，以及（5）创建一个简单的测试模式，可以作为常规质量保证检查的基础。给出了这些测试的结果。讨论了剂量测定的影响以及叶片运动设计的考虑。 (C) 1996 年美国医学物理学家协会。
It has been shown that intensity-modulated fields have the potential to deliver optimum dose distributions, i.e., high dose uniformity in the target and lower doses in the surrounding critical organs. One way to deliver such fields is by using dynamic multileaf collimation (DMLC). This capability is already available in research mode on some treatment machines. While much effort has been devoted to developing algorithms for DMLC, the mechanical reliability of this new treatment delivery mode has not been fully studied. In this work, we report a series of tests designed to investigate the mechanical aspects of DMLC and their implications on dosimetry. Specifically, these tests were designed to examine (1) the stability of leaf speed, (2) the effect of lateral disequilibrium on dose profiles between adjacent leaves, (3) the significance of acceleration and deceleration of leaf motion, (4) the effect of positional accuracy and rounded-end of the leaves, and (5) create a simple test pattern that may serve as a basis for routine quality assurance checks. Results of these tests are presented. The implications on dosimetry and consideration for the design of leaf motion are discussed. (C) 1996 American Association of Physicists in Medicine.