Computed Tomography Angiography for Interventions and Surgery

Abstract

Computed tomography (CT) angiography is an indispensable technique for the evaluation of vascular disease. Technologic advances have made helical multidetector CT a standard modality for preoperative and postoperative imaging of the vascular system. In this discussion, we review basic concepts in CT scanning and scanner design as well as principles of CT angiography (CTA). We apply these principles to the selection of appropriate prescan and postscan parameters and review postprocessing techniques such as multiplanar reformatting and three-dimensional image reconstruction. We explain common artifacts associated with CT imaging. We then discuss clinical applications of CTA for planning endovascular interventions and performing postoperative surveillance. Finally, the risks of CTA such as radiation exposure and contrast nephropathy are reviewed.