Pseudolesions of the liver possibly caused by focal rib compression: Analysis based on hemodynamic change

OBJECTIVE. The put-pose of this study is to show and analyze the CT appeara nce of pseudolesions of the liver caused by rib compression and to discuss the possible mechanism on the basis of findings of incremental dynamic CT, CT during arterial portography, and CT hepatic arteriography. CONCLUSION. Focal compression of the liver caused by curved ribs can cause transient focal diminishment of portal venous perfusion without significant ly altering hepatic arterial perfusion. Such diminishment may be observed a s low-density areas on the early phase of incremental dynamic CT.