功率多普勒超声(PD)是一项新技术,其临床评价和技术发展还处于早期。作者用PD对颈内动脉(ICA)中度和重度狭窄的诊断和定量作了研究,并同彩色血流多普勒(CFD)及数字减影血管造影(DSA)作了对比。 对象为连续波多普勒(CWD)检出颅外ICA狭窄超过50％的病人54例,年龄45岁～84岁,男45例,女19例。采用双向CWD进行筛查,探头频率4.0 MHz,狭窄50％～69％为中度狭窄,70％以上为重度狭窄。PD和CFD采用7.5MHz线阵式脉冲波探头,根据截 Power Doppler ultrasound (PD) is a new technology, its clinical evaluation and technological development is still early days. The authors used PD to diagnose and quantify moderate and severe ICA stenosis and compared it with color flow Doppler (CFD) and digital subtraction angiography (DSA). The object was continuous wave Doppler (CWD) detection of extracranial ICA stenosis in more than 50% of 54 patients, aged 45 years to 84 years, 45 males and 19 females. Using bi-directional CWD screening, the probe frequency 4.0 MHz, stenosis 50% to 69% for the moderate stenosis, more than 70% for severe stenosis. PD and CFD using 7.5MHz linear pulse probe, according to the cut