首页> 美国卫生研究院文献>Journal of Applied Clinical Medical Physics >Collision indicator charts for gantry‐couch position combinations for Varian linacs
【2h】

Collision indicator charts for gantry‐couch position combinations for Varian linacs

机译:瓦里安直线加速器龙门架位置组合的碰撞指示器图

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

The use of non‐coplanar radiation fields can potentially lead to collisions between the gantry and the couch or patient. The collisions are often not realized until the plan is finished and the fields are checked on the machine, or even later when the patient is already on the table. This paper presents an easy method of gauging if a collision is likely between the gantry and couch or patient during treatment planning. The method involves creating a chart of allowable gantry and couch combinations. The charts contain curves on a polar graph of the gantry and couch angle “plane”. The curves display the limits of collisions for each gantry and couch combination for vertical couch positions 10, 15 and 20 cm below isocenter and for couch lateral positions of 10,0,+10cm, covering the majority of couch positions encountered in patient treatments. All combinations in the region within the curves (containing the origin) are valid, while all combinations outside the curves will result in a collision. The data for the charts are collected from measurements of the gantry angle that just clears each couch angle. The patient presence was modeled by placing a stereotactic body frame on the top of the couch. Separate charts were created for couch angles between 0° and 90° and between 360° and 270° over all gantry angles. The graphs are easy to create, implement, and use in the clinic and help reduce the time, complications, and uncertainties of planning with non‐coplanar fields.PACS numbers: 87.55.‐x; 87.56.‐v
机译:使用非共面辐射场可能会导致龙门架与卧榻或患者之间发生碰撞。直到计划完成并在机器上检查字段,或者甚至当患者已经在桌子上之后,才常常意识到冲突。本文提出了一种简单的方法,可以在治疗计划期间进行测量,以检查龙门架与卧榻或患者之间是否可能发生碰撞。该方法涉及创建允许龙门架和床架组合的图表。这些图表包含龙门架和床角“平面”的极坐标图上的曲线。曲线显示了对于等高线下方10、15和20 cm的垂直躺椅位置以及 - 10 0 + 10 cm ,涵盖了大多数沙发在患者治疗中遇到的职位。曲线内区域(包含原点)中的所有组合均有效,而曲线外的所有组合均将导致碰撞。图表数据是从龙门角的测量中收集的,龙门角只是清除了每个卧榻角。通过将立体定向的身体框架放在沙发的顶部来模拟患者的身材。针对所有龙门角度在0°和90°之间以及在360°和270°之间的床角创建了单独的图表。这些图形易于在临床中创建,实施和使用,有助于减少使用非共面区域进行规划的时间,复杂性和不确定性。PACS编号:87.55.-x; 87.56.-v

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号