我院近些年来,对各类人员(近7000人次)进行了胸部透视,其阳性检出率为8%,其中在某小学近400人次的胸透中,阳性检出率为零。不难看出,绝大部分被检者,未能从中获得利益,且浪费了卫生资源。据资料表明:胸部X射线检查,在我国已占所有放射学检查的70%～80%。由于胸部透视所致被检者的照射剂量高(就皮肤剂量而言,透视为拍片的10～100倍),而获得的诊断 In recent years, our hospital conducted a chest fluoroscopy on all kinds of personnel (nearly 7,000), with a positive detection rate of 8%. Among the nearly 400 people in a primary school, the positive detection rate was zero. It is not difficult to see that the vast majority of those who were seized failed to benefit from it and wasted health resources. According to the data show that: chest X-ray examination, in our country accounted for 70% to 80% of all radiological examinations. Because of the high radiation dose of the subject due to the chest fluoroscopy (10 to 100 times as high as the skin dose), the diagnosis obtained