Abstract
We compared the image of multiplanar reconstruction (MPR) by multi-detector row CT (MDCT) and contrast-enhanced ultrasonography (CEUS) by Truagent Detection Modetrade mark after radiofrequency ablation (RFA) for hepatocellular carcinoma to assess treatment efficacy. We examined 16 nodules in 15 patients who underwent CEUS just before and on the day following RFA, and then CT-MPR by MDCT 5 or 6 days after RFA. We measured the lengths of the major and minor axes at the maximal necrotic area, which were thought to correspond to similarly shaped images on both CT-MPR and CEUS. There are significant positive correlations in the lengths of the major and minor axes at the maximal necrotic area as measured on CT-MPR and CEUS. The differences in the lengths of the major and minor axes between CT-MPR and the parenchymal phase of CEUS were smaller than those between CT-MPR and the late vascular phase of CEUS. Our study showed a non-enhanced area of CT-MPR 5 or 6 days after RFA was similar to that of the parenchymal phase of CEUS on the day following RFA, and so it is possible to assess the treatment efficacy by CEUS on the day following RFA.
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