Time Controlled Computed Tomographic Angiography

Abstract

A technique is described which, by exact timing of injection and computed tomography (CT) scans, allows a high contrast medium concentration in blood (14 mg I/ml blood) to be reached for a brief period, sufficient for a fast scan of 5-10 s duration. This scan demonstrates the early perfusion of the vascular bed of the various organs. With serial, fast CT scans of the same section with 30 s intervals for 3 min, a dynamic investigation of contrast medium distribution in vessels, tissue and excretory pathways may be obtained. Preliminary experiments indicate the promising usefulness of this type of examination for brain, kidney, pancreas, spleen, liver and small bowel.