Published Online:https://doi.org/10.1148/rg.345130070

Various strategies for improving image quality and patient safety in CT angiography of the abdomen are described, with emphasis on principles and applications of novel technologies such as dual-energy CT for analysis of vascular disease.

Computed tomographic (CT) angiography has become the standard of care, supplanting invasive angiography for comprehensive initial evaluation of acute and chronic conditions affecting the vascular system in the abdomen and elsewhere. Over the past decade, the capabilities of CT have improved substantially; simultaneously, the expectations of the referring physician and vascular surgeons have also evolved. Increasingly, CT angiography is used as an imaging biomarker for treatment selection and assessment of effectiveness. However, the growing use of CT angiography has also introduced some challenges, as potential radiation-associated and contrast media–induced risks need to be addressed. These concerns can be partly confronted by modifying scanning parameters (applying a low tube voltage) with or without using software-based solutions. Most recently, multienergy technology has endowed CT with new capabilities offering improved CT angiographic image quality and novel plaque characterization while decreasing radiation and iodine dose. In this article, we discuss current and new approaches using both conventional and multienergy CT for studying vascular disease in the abdomen. We propose various approaches to overcoming commonly encountered image quality challenges in CT angiography. In addition, we describe supplemental strategies for improving patient safety that leverage the available technology.

©RSNA, 2014

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Article History

Received: Aug 30 2013
Revision requested: Dec 18 2013
Revision received: Jan 18 2014
Accepted: Mar 24 2014
Published online: Sept 10 2014
Published in print: Sept 2014