A Universal Timing Strategy for Moving Table Peripheral MRA

Jeffrey Harold Maki^1,2, George Rachid Oliveira², Gregory J. Wilson³

Timing data from 71 peripheral MRA (pMRA) studies was analyzed to determine a universally applicable, simple algorithm for successfully performing pMRA. The algorithm requires only knowledge of the antecubital-foot contrast transit time, obtained from a time-resolved study of the lower extremity. Utilizing this data, good success can be achieved in terms of not outrunning the bolus and minimizing venous contamination. Testing of the proposed technique was successful, with a slightly greater than expected 20% venous rate (most mild - none rendering the examination non-diagnostic). Further refinements examining the arterio-venous window can apparently predict those who will demonstrate venous contamination.