الفهرس 
Introduction and Aim of the WorkOnly 14 pages are availabe for public view
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Abstract
Hepatocellular carcinoma (HCC) is the most com.lTIOn terminal complication of chronic inflammatory and fibrotic liver disease. The major causes of HCC worldwide are known and preventable; Hepatitis B and C viruses.
Ultrasound as a diagnostic tool is very good in early detection of HCC with a very high sensitivity. MDCT is a dramatic diagnostic tool to asses HCC and the hosting liver for any interventional procedure.
The development of image-guided percutenous techniques for local tumor ablation has been one of the major advances in the treatment of liver malignancies. Among these methods, RF ablation is currently established as the primary ablative modality at most institutions. RF ablation is accepted as the best therapeutic choice for patients with early-stage hepatocellular carcinoma (BeC) when liver transplantation or surgical resection is not suitable options.
Pretreatment imaging must carefully define the location of each lesion with respect to surrounding structures. The role of MDCT is not only for pre procedure assessment but the real great role is starting after the procedure to assess the short and long-term treatment outcome. Post-treatment assessment and follow-up by contrast-enhanced triphasic MDCT imaging are recognized as the standard modalities to assess treatment outcome. CT images obtained immediately after treatment show successful ablation as a non-enhancing area with or without peripheral enhancing rim. The enhancing rim that may be observed along the periphery of the ablation zone appears a relatively concentric, symmetric, and uniform process in an area with smooth inner margins. This is a transient Ending that represents a benign physiologic response to thermal injury (reactive hyperemia). Reactive hyperemia in tissue surrounding.