Fig. 3. Fusion imaging-guided biopsy of a focal hepatic lesion in a patient with hepatitis B virus carrier.

A. Precontrast T1-weighted magnetic resonance (MR) image shows an ill-defined lesion (arrow) with an iso-to-high signal intensity. B. The lesion (arrow) shows arterial enhancement. C. In the hepatobiliary phase, the lesion (arrow) shows a low signal intensity. D. Planning ultrasonography (US) for radiofrequency ablation (RFA) was performed since the lesion was diagnosed as a small hepatocellular carcinoma (HCC) on the MR images. On planning US with fusion imaging, the location (arrow) of the lesion on US was different from that on the fused MR image. In addition, since the signal intensity on the pre-contrast T1-weighted image was not consistent with that of the usual HCC, instead of RFA, percutaneous biopsy was performed; it revealed that the lesion was an eosinophilic abscess.