CT- Angiogram

The normal liver cell receives the majority of its blood supply from the portal vein and a liver tumor receives the majority of its blood supply from the hepatic arerty. Thus, dye injected into the portal vein will emphasize the normal liver cells and make the normal liver bright. In contrast, the liver tumor will be very dark. This test accurately defines the number of metastases and their relationship to liver blood vessels which is important information in planning treatment strategies.

The CT angiogram is similar to the CT scan except that it involves a contrast dye injected into one of the arteries (superior mesenteric artery) that supply the liver. The x-rays detect the dye as it flows through the bloodstream, outlining the blood vessels in the liver and the flow of blood through the organ. Computer analysis generates images and stores them for further study,.

Unlike CT scans, most CT angiograms are done in a hospital setting. A local anesthetic is administered before a catheter is inserted into a blood vessel in your groin and the tip of the catheter is placed in proper position near your liver and an injection of contrast is made. Shortly after this injection, a CT scan is performed. This test provides very detailed information on the information on the number and location of your liver tumors. Typically, the test takes 2 -3 hours to perform and you must stay in the hospital for 6 - 8 hours to be observed for potential complications.