Focal liver lesions: Doppler ultrasound

Echo patterns of focal liver lesions as well as other morphological criteri a do not suffice for differential diagnosis. In an attempt to increase the specificity of ultrasound of focal liver lesions, several years of Doppler- flow information ras evaluated. Recent advances in ultrasound technology (p ower Doppler imaging, second harmonic imaging) as well as commercial availa bility of an intravenous signal enhancer (contrast agent) have additionally improved results of this technique.