الفهرس 
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Abstract
Hepatocellular carcinoma (HCC) is the fifth most common
malignancy in the world. 90% of patients have an underlying cirrhosis.
Among the percutaneous ablation techniques of HCC treatment are
percutaneous radiofrequency thermal ablation (RFTA) and percutaneous
ethanol injection (PEI).
Several imaging modalities to follow up patients with HCC after
treatment are available such as Doppler ultrasonography, contrast
enhanced ultrasonography, angiography, MRI with and without contrast
and triphasic helical CT.
The aim of this study was to study the role of triphasic CT in the
follow-up after PEI and percutaneous RFTA of HCC to detect the
response, tumor necrosis, persistence of viable tissue, evidence of
recurrence, and development of new lesions.
This study included 36 patients with 38 hepatic focal lesions of
variable sizes diagnosed as HCC by Triphasic CT, and serum level of
AFP or fine needle biopsy from the focal lesion when the former two
methods were not conclusive. They were treated with PEI (16 patients
with 17 lesions) or RFTA (20 patients with 21 lesions).
Triphasic helical CT scans were done for all patients. We evaluated
the pretreatment and 21 days post treatment triphasic helical CT scans for
the following features: site, size, number, therapeutic response (tumor
necrosis and persistence of viable tissue), volumetric lesion regression,
evidence of local recurrence, development of new lesions, and occurrence
of procedural complications.