Figure 7a. Active hemorrhage. (a) Arterial phase contrast-enhanced CT scan shows high-attenuation contrast material extravasation (arrow) within a massive hematoma in the posterior right hepatic lobe. (b) Radiograph obtained after injection of contrast material through a microcatheter in the right hepatic artery (arrowheads) shows active contrast material extravasation from the superior segmental branch of the artery (arrows).