放射剂量可根据以下因素而减少:适当缩小光圈、缩短荧屏显示时间、减少曝光次数及透视曝光因素的优化。作者选择20例进行双重对比钡灌肠造影(DCBE)的病人。所有检查均经同一操作者,使用同一设备实施,而且使用标准的技术。选取的病人随机分配为两组。在A组病人检查中使用0.5mA的透视 Radiation dose can be reduced by the following factors: the appropriate reduction of aperture, shorten the screen display time, reduce the number of exposure and optimization of perspective exposure factors. The authors selected 20 patients undergoing double contrast barium enema (DCBE). All inspections are performed by the same operator using the same equipment and using standard techniques. Selected patients were randomly assigned to two groups. A group of patients in the examination used 0.5mA fluoroscopy