Hepatocellular carcinoma (HCC) is the most common primary liver cancer and has a worldwide distribution. Interventional procedures for percutaneous tumor ablation have an increasingly important role in the treatment of liver malignancy. After interventional therapies, noninvasive vascular diagnostic imaging (such as : Duplex, Color and Power Doppler Sonography and spiral C.T ) have the key role to determine if the treated lesion is completely ablated or contains area of residual viable neoplastic tissue . This is particularly important since in cases of incomplete necrosis of the lesions, treatment can be repeated and tumor ablation can be further pursued. This study was conducted on (30) patients with (33) HFLs proved to be hepatocellular carcinoma (HCC) , to analysis the usefulness of Duplex, color and power Doppler sonography in the assessment of tumor vascularity after percutaneous ablative therapies (PATs). Residual Doppler signals in the tumor after (PATs) were related to residual viable tumor cells. However absence of signals does not indicate complete ablation.