Harrison R M
Phys Med Biol. 1983 Jun;28(6):701-7. doi: 10.1088/0031-9155/28/6/010.
Central-axis depth dose data for diagnostic qualities (1-4 mm Al HVL) have been used to calculate the total energy imparted to patients or phantoms during X-ray examinations. A 'saturated scatter' method has been used and allowance is made for the finite dimensions of the patient by using PDD data for large but finite field sizes. For the purpose of integration, PDD data have been represented as a function of depth by two exponential components. Data in the form of energy imparted per unit central-axis surface dose and per unit surface X-ray field are tabulated as functions of kVp, first HVL, phantom thickness and the field size of the original PDD data. Comparison with energy fluence calculations of total energy imparted made by other workers indicates good agreement under similar phantom and X-ray quality conditions, although it is noted that anatomical variations between patients will in practice lead to uncertainties in the total energy imparted.
用于诊断质量（1 - 4毫米铝半值层）的中心轴深度剂量数据已被用于计算X射线检查期间传递给患者或体模的总能量。采用了一种“饱和散射”方法，并通过使用大尺寸但有限野尺寸的百分深度剂量（PDD）数据来考虑患者的有限尺寸。为了进行积分，PDD数据已由两个指数分量表示为深度的函数。以每单位中心轴表面剂量和每单位表面X射线野传递的能量形式的数据被制成表格，作为管电压（kVp）、第一半值层、体模厚度和原始PDD数据的野尺寸的函数。与其他研究人员进行的总能量传递的能量注量计算结果比较表明，在相似的体模和X射线质量条件下，二者吻合良好，不过需要注意的是，实际上患者之间的解剖学差异会导致总能量传递存在不确定性。
