Harrison R M
Phys Med Biol. 1983 Jan;28(1):1-18. doi: 10.1088/0031-9155/28/1/001.
Tissue-air and scatter-air ratios for use in diagnostic radiology (1-4 mm Al HVL) have been calculated from previously reported measurements of percentage depth doses (PDD) and backscatter factors (BSF) for the same quality range. Tabulations of TAR are presented. The calculated TARs are compared with direct measurements of TAR which have been carried out by other workers. TARs and SARs are shown to be functions of peak tube potential for a given first HVL as a consequence of a similar dependence of PDD. This emphasises once again the inadequacy of the first HVL alone as a specifier of beam quality.
已根据先前报道的相同质量范围内的百分深度剂量（PDD）和反向散射因子（BSF）测量值，计算出用于诊断放射学（1 - 4毫米铝半值层）的组织 - 空气比和散射 - 空气比。给出了组织 - 空气比的表格。将计算得到的组织 - 空气比与其他研究人员进行的直接测量值进行了比较。由于百分深度剂量具有相似的依赖性，对于给定的第一半值层，组织 - 空气比和散射 - 空气比被证明是峰值管电压的函数。这再次强调了仅用第一半值层来指定射线质是不够的。
