Bull’s Eye Sign

Abstract

In liver cirrhosis regenerative nodes are surrounded by zones of interstitial fibrosis. The veins pass through the centers of the nodes. On native images node tissue has a higher density than the vessels and interstitium due to the deposition of hemosiderin – the “reversed bull’s eye” sign (↑). After IV contrast enhancement the veins and fibrous tissue can accumulate contrast agent more intensively than the tissue of regenerative nodes thus forming the “bull’s eye” sign (∆). Much more often the densities of the nodes and the fibrous tissue average in parenchymal phase of contrast enhancement.

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In liver cirrhosis regenerative nodes are surrounded by zones of interstitial fibrosis. The veins pass through the centers of the nodes. On native images node tissue has a higher density than the vessels and interstitium due to the deposition of hemosiderin – the “reversed bull’s eye” sign (↑). After IV contrast enhancement the veins and fibrous tissue can accumulate contrast agent more intensively than the tissue of regenerative nodes thus forming the “bull’s eye” sign (∆). Much more often the densities of the nodes and the fibrous tissue average in parenchymal phase of contrast enhancement.