Computed tomography, with radiocontrast in the venous phase ( " CT venography " or CTV ), has a detection rate that in some regards exceeds that of MRI . The test involves injection into a vein ( usually in the arm ) of a radioopaque substance, and time is allowed for the bloodstream to carry it to the cerebral veins-at which point the scan is performed.
2.
Along the inferior aspect of the right lobe it projects exophytically from the hepatic surface . It extends up to the hepatic capsule as well . The arterial phase demonstrates evidence of mild tortuosity of right hepatic artery . Marginal dilatation is also seen of the same vessel . Lobular surface of the liver is observed, especially of the right lobe . There is evidence of thrombosis of the right portal vein . The thrombosis extends into the proximal portion of the left portal vein as well . partial thromobosis of the main portal vein is also seen . The superior mesentric vein is normal, the splenic vein is also normal . In the segment IV of the lever there is a subtle 1.0 to 1.4 cm hypoattenuated lesion, which is best appreciated in the portal venous phase and in the delayed phase . In arterial phase of the evalution, this lesion is marginally hypoattenuated to hepatic parenchyma . The caudate lobe is normal.
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