Use of power Doppler sonography for differential diagnosis of small hepatocellular carcinoma and adenomatous hyperplastic nodule

Objective To evaluate applicability of power Doppler sonography(PDS)in differential diagnosis of small hepatocellular carcinoma(SHCC)and adenomatous hyperplastic nodule(AHN). Methods Twenty-two cases of SHCC and 15 cases of AHN were investigated by PDS and the findings were campared with those of digital subtraction angiography(DSA).Reslts The rates of arterial and portal flow in an afferent tumor vessel were 86.4% and 40.9% in SHCCsrespectively.The rate of portal flow in an afferent tumor vessel was 60.0% in AHNs,while no arterial flow was detected(P