Artificial intelligence principles are used to determine and analyse the defects according to pulse echocharacteristics.
采用人工智能原理，根据脉冲回波特征，对缺陷作出判断和分析。
2
Methods The ultrasonic features of 36 cases with biliary duct disease post Cholecystectomy were analysed. The biliary duct diameter and the echocharacteristics inside duct were examined.
方法采用超声仪检测3 6例胆囊切除术后患者的肝内外胆管， 测量胆管内径，观察管腔内回声。
3
According to the moving target's echocharacteristics acquired by the frequency-modulated stepping radar, the envelope migration is firstly carried out for the subset of the compressed pulse.