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超声在医疗诊断上的应用,到现在已有三十多年的历史。最初是使用连续式超声诊断仪,用穿透法检查颅脑疾病,但进展不大。五十年代以来开始采用脉冲式超声诊断仪,用反射法探查疾病,先后用于探查胆结石,乳腺脓肿、肾脏肿物和肺结核等,获得了某些成就,从此,脉冲反射法代替了穿透法,对疾病的诊断逐渐达到临床应用阶段。目前超声诊断法几乎已用于探查各种疾病,如肝、脾、胆囊、颅脑、心脏、肾脏、子宫等各部位;重点还是对肿瘤和心脏病的早期诊断。从超声诊断学的发展趋势来看,
The application of ultrasound in medical diagnosis has now been more than thirty years old. The first is the use of continuous ultrasonic diagnostic apparatus, with penetrating examination of brain diseases, but little progress. Since the 1950s, pulsed ultrasound has been used to detect diseases by reflection method. Some of the achievements have been made in the exploration of gallstones, breast abscesses, renal masses and tuberculosis. Since then, the pulse reflection method has replaced the penetration Act, the diagnosis of the disease gradually reached clinical application stage. At present, ultrasound has been used to detect almost all kinds of diseases such as liver, spleen, gallbladder, brain, heart, kidney, uterus and other parts; the focus is still on the early diagnosis of cancer and heart disease. From the development trend of ultrasound diagnosis point of view,