计划生育是一项重要国策，自从宫内节育器问世以来，就普遍采用了Ｘ射线对金属节育器进行检查。尽管某些地区用Ｂ超检查代替Ｘ射线检查［１］，用电视透视取代普通荧光屏透视，但广大农村仍主要用荧光屏透视进行节育器检查。荧光屏检查能确定宫内有无节育器，但由于“Ｔ”... Family planning is an important national policy, since the advent of IUDs, the use of X-ray metal IUDs are generally examined. Although some regions use B-ultrasound to replace X-ray examination [1], television fluoroscopy instead of ordinary fluoroscopy, but the vast rural areas are still mainly used fluoroscopic fluoroscopy examination. Fluorescent screen to determine whether IUD, but due to “T” ...