Humm J L, Pizzuto D, Fleischman E, Mohan R
Department of Medical Physics, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA.
Int J Radiat Oncol Biol Phys. 1995 Dec 1;33(5):1101-8. doi: 10.1016/0360-3016(95)00155-7.
To develop computer software that assists the planner avoid potential gantry collisions with the patient or patient support assembly during the treatment planning process.
The approach uses a simulation of the therapy room with a scale model of the treatment machine. Because the dimensions of the machine and patient are known, one can calculate a priori whether any desired therapy field is possible or will result in a collision. To assist the planner, we have developed a graphical interface enabling the accurate visualization of each treatment field configuration within a "room's eye view" treatment planning window. This enables the planner to be aware of, and alleviate any potential collision hazards. To circumvent blind spots in the graphic representation, an analytical software module precomputes whether each update of the gantry or turntable position is safe.
If a collision is detected, the module alerts the planner and suggests collision evasive actions such as either an extended distance treatment or the gantry angle of closest approach.
The model enables the planner to experiment with unconventional noncoplanar treatment fields, and immediately test their feasibility.
开发一种计算机软件，以协助治疗计划制定者在治疗计划过程中避免龙门架与患者或患者支撑组件发生潜在碰撞。
该方法使用带有治疗机器比例模型的治疗室模拟。由于机器和患者的尺寸已知，因此可以预先计算任何所需的治疗野是否可行或是否会导致碰撞。为了协助计划制定者，我们开发了一个图形界面，能够在“房间视角”的治疗计划窗口中准确可视化每个治疗野配置。这使计划制定者能够意识到并消除任何潜在的碰撞危险。为了规避图形表示中的盲点，一个分析软件模块会预先计算龙门架或转台位置的每次更新是否安全。
如果检测到碰撞，该模块会提醒计划制定者并建议避免碰撞的措施，例如延长距离治疗或最接近路径的龙门架角度。
该模型使计划制定者能够试验非常规的非共面治疗野，并立即测试其可行性。
