Value of Power Doppler and Colored Doppler with Gray­ Scale Sonography in Diagnosis of Hepatic Tumors

Abstract

Since the advent of US ,morphological descriptions of the liver in health and disease continued to add to our knowledge of hepatic pathology and gained a permenant place in the investigations and management of liver disease. This because it is rapid, safe and non invasive .(Cossgrove et all981).

Colored doppler flow imaging developed by Namekawa et al in 1982 was originally to evaluate the dynamics of blood flow in heart and big vessels.

Its application to liver tumors was initiated in1985 by Sukigura et al who reported successful color imaging ofthe arteries runinig in the margin and within the tumor in two cases of advanced hepatocellular carcinoma.

Merrit in 1987 observed increased vascularity in most cases of metastatic cancer in the liver.

Tanaka et al in 1989 described special vascular patterns for hepatic focal lesions:

1. Basket pattern for HCC

2. Spot pattern for haemangioma

3. Detouring pattern for metastasis