加速器X射线组织最大剂量比测量值与计算值的比较

Comparison of Measurement and Computed Value for Tissue Maximum Ratio of Accelerator X-ray Machine

目的:验证组织最大剂量比(TMR)计算的准确性。方法:用三维水箱测量百分深度剂量(PDD)和TMR,并与计算值TMR进行比较。结果:测量值与计算值在误差允许范围内。结论:X射线TMR的计算值可直接用于临床剂量计算。

Objective To verify the accuracy of tissue maximum ratios（TMR）of the calculation.Methods The percentage depth doses（PDD） and TMR were measured by three-dimensional tanks,and the measurement values of TMR were compared with the calculation ones.Results The measurement values and the calculation ones of TMR were within the range of allowable error.Conclusion X-ray calculation values of TMR can be directly used for clinical dose calculation.