Methods The endometrium of 58 patients with or without abnormal uterine bleeding as observed and proved by hysteroscopy or operation.The width and resistance index of endometrium were measured.

• 方法运用高分辨率探头观察经宫腔镜或手术证实的54例患者的子宫内膜形态及血流状态,并测量内膜厚度及病变处的阻力指数。