Modification of the Depth Dose Curves of Various Radiations by Interposed Bone

Physical depth dose measurements were performed in presence of interposed bone at various energies. The obtained empirical data show the resulting modifications of the standard depth dose curves by intervening bone. The data are arranged in four groups of radiations, according to the basic differences in the type of modifications: (1) 50 to 100 kVp, (2) 140 to 400 kVp X rays, (3) 22·5 MeV betatron X rays, and (4) 13 to 18 MeV electron beams. The data are reported mainly for practical, clinical use, and they may help the radiologist physician in calculating the depth dose behind bony layers in his specific physical and anatomical situations. Physical explanations, comparison with theoretical calculations and with data published by others were at this time omitted.