A new method is presented for generating three-dimensional images of the hepatic venous anatomy from helical computed tomography (CT) scans using volumetric rendering. The helical CT scans were obtained using peripheral injection of intravenous contrast via a power injector. Five patients with suspected liver tumors were studied from which one sample case was selected for illustration. Surgical planning of hepatic resection from three-dimensional images will soon become a practical part of patient care.