B 型超声波(以下简称B 超)检查是一种很有价值的临床辅助诊断方法。它简便易行,迅速可靠,无创伤性,定位准确,与X 线和同位素检查相比,操作者和被检者都可以免受损害,故在临床辅助诊断中占有越来越重要的地位,并逐步进入治疗及预防领域。 B-mode ultrasound (hereinafter referred to as B-ultrasound) is a valuable clinical diagnostic method. It is simple, rapid and reliable, non-invasive, accurate positioning, compared with X-ray and isotope examination, the operator and the subjects can be protected from damage, it plays an increasingly important role in the clinical diagnosis, And gradually enter the field of treatment and prevention.