Figure 23b. Hepatic abscess. (a) Aortogram shows active extravasation from a branch of the right hepatic artery (arrows). Arterial embolization was performed. (b) Contrast-enhanced CT scan obtained 3 weeks after embolization shows an encapsulated low-attenuation fluid collection (arrows) with multifocal gas bubbles, an appearance that suggests an abscess. Percutaneous catheter drainage was performed, and pus was aspirated. (c) Radiograph shows an abscess cavity (arrows) and embolized microcoils in the right hepatic artery (arrowheads).