Fig. 1From: Positive contrast spiral imaging for visualization of commercial nitinol guidewires with reduced heating a Pulse sequence diagram for spiral gradient echo imaging demonstrating change in slice refocusing gradient to transition from standard anatomical contrast (1) to positive contrast (2). b Resulting in vivo anatomical (1) and positive contrast (2) images with red arrowheads indicating nitinol guidewire in the aorta of a Yorkshire swineBack to article page