Methods The entrance surface doses (ESD) to patients measured with TLD and the image quality of radiographic films were evaluated on the basis of CEC image quality criteria.

• 方法 QC前后用热释光剂量探测器测量病人入射体表剂量，并用欧洲共同体（CEC） 影像质量标准对已测量剂量的病人X 射线胶片影像质量进行评价，做统计学分析。