Abstract
Dynamic computed tomography of hepatic tumors revealed a transient attenuation difference of the liver in a lobar or segmental distribution in 3 cases. The difference was most prominent during the heptogram phase. It was attributed to siphonage of arterial blood by hepatic tumors in 2 cases, while an increase of arterial flow induced by portal vein occlusion was inferred in the other case. Results indicate dynamic computed tomography will be useful in analysis of geometrical hemodynamics.