Seaby A W, Thomas M, Craven C
Department of Medical Physics and Clinical Engineering, Singleton Hospital, Swansea NHS Trust, UK.
Br J Radiol. 1999 Mar;72(855):293-5. doi: 10.1259/bjr.72.855.10396221.
For a linear accelerator the direction and orientation of a beam is specified uniquely by a set of gantry, turntable and collimator angles. Sometimes, particularly for 3D planning, it is very difficult for the planner or plan checker to visualize the set-up of the treatment machine from the angles specified for each beam. This note describes a simple line-of-sight model that can be used for planning and checking the radiotherapy geometry prior to simulator verification.
对于直线加速器，射束的方向和取向由一组机架角、转台角和准直器角唯一确定。有时，特别是对于三维治疗计划，计划制定者或计划检查者很难根据为每条射束指定的角度来直观地想象治疗机的设置情况。本说明介绍了一种简单的视线模型，可用于在模拟验证之前规划和检查放射治疗的几何形状。
