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Method for rounded-leaf offset definition on a medical linear accelerator.

机译：在医用线性加速器上定义圆叶偏移的方法。

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摘要

A necessary parameter in the treatment of cancer by medical x-ray is the rounded leaf offset, defined by the difference between the radiation field and visible light field sizes. Although often noted that manufacturer-recommended tables for the offset appear inaccurate on a machine-specific basis, there has been little treatment of the reasons why.;Expanding current methods for measuring the offset, this study delineates an improved approach using film-based techniques to improve precision. A mathematical model is derived describing the behavior of an offset curve, proper statistical analysis is applied to experimental design, and a new curve is validated. An experimental process is described for determination of offsets which reduce observed uncertainties in measurement from +/-0.30 to +/-0.042 cm. Finally, gathered data is found to match the predicted model with a 55.4% confidence interval, suggesting the process is plausible but in need of further definition of physical conditions.
机译：通过医用X射线治疗癌症的必要参数是圆形的叶片偏移，该叶片偏移由辐射场和可见光场大小之间的差异定义。尽管通常会注意到制造商建议的偏移量表在特定于机器的基础上似乎不准确，但是几乎没有对原因进行处理。提高精度。推导了描述偏移曲线行为的数学模型，对实验设计进行了适当的统计分析，并对新曲线进行了验证。描述了用于确定偏移的实验过程，该偏移将测量中观察到的不确定性从+/- 0.30厘米减小到了+/- 0.042厘米。最后，发现收集到的数据与55.4％的置信区间匹配预测的模型，表明该过程是合理的，但需要进一步定义物理条件。

著录项

  • 作者

    Mader, Brandon Cole.;

  • 作者单位

    The University of Alabama in Huntsville.;

  • 授予单位 The University of Alabama in Huntsville.;
  • 学科 Engineering Mechanical.;Health Sciences General.
  • 学位 M.S.E.
  • 年度 2011
  • 页码 90 p.
  • 总页数 90
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 TS97-4;
  • 关键词

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