الفهرس 
Normal anatomy
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Abstract
Conventional liver ultrasound, is regarded as being highly sensitive for detection of focal hepatic lesions, however,with low specificity. This has led to early attempts to improve the specificity by incorporating vascular information into ultrasound. Tumour vascularity has been studied extensively with various imaging modalities including color Doppler ultrasound. Recent studies has shown that power Doppler ultrasound is more sensitive in detection of tumour vascularity in hepatic tumours than color Doppler ultrasound.In this study, vascularity of hepatocellular carcinoma has been evaluated by both color and power Doppler imaging. It was< conducted upon 50 patients with pathologically proved hepatocellular carcinoma (They were 39males and 11 females), with thier age ranging between 41 and 70 years.In this study, we observed that, Power Doppler sonography was higher than color Doppler sonography in detection of intratumoural vascularity of hepatocellular carcinoma in right hepatic lobe but not in left hepatic lobe. On power Doppler sonography, the percentage ( 86.1% in right hepatic lobe and 57.1% in left hepatic lobe) of lesions with detected vascularity exceeded those recorded on color Doppler sonography (66.7% in right hepatic lobe and 50%in left hepatic lobe).