作者在1957年到1970年间对大约600例膀胱癌患者给予放疗,用~(60)钴治疗机和直线加速器在7～8周内给肿瘤量6000～7000拉得,并没有发生过股骨颈骨折。作者观察了其中12例膀胱癌患者经上述剂量治疗以后,股骨颈矿物质含量的变化。股骨颈矿物质含量是用Gustafsson氏等人于1974年报告的伦琴分光光度测量法(Roentgen Spectrophotometry)测定。分别于放射治疗前、治疗中和治疗后观察3～12个月,平均治疗后观察6个月。12 The authors administered radiotherapy to about 600 patients with bladder cancer between 1957 and 1970 using a ~ (60) cobalt machine and a linear accelerator to deliver a tumor volume of 6000-7000 over 7-8 weeks without femoral neck fractures . The authors observed changes in femoral neck mineral content in 12 patients with bladder cancer after the above dose. Femoral neck mineral content was measured using the Roentgen Spectrophotometry reported by Gustafsson et al. In 1974. Respectively in the radiotherapy before, during and after treatment observed 3 to 12 months, after an average of 6 months of observation. 12