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Abstract #2548

Determination of trigger delays for strain independent cardiac diffusion measurements based on automated segmentation of cine images

Peter Speier 1 , Andreas Greiser 1 , Christoph Guetter 2 , and Marie-Pierre Jolly 2

1 Siemens AG Healthcare Sector, Erlangen, Germany, 2 Imaging and Computer Vision, Siemens Corporation, Corporate Technology, Princeton, NJ, United States

Double-triggered stimulated-echo EPI with monopolar diffusion encoding is a robust method for measuring diffusion in the left ventricle of the heart. To minimize contamination of diffusion results by cardiac motion, encoding must take place at one of two strain sweet spots, i.e., time points in the cardiac cycle where cardiac strain assumes its average value. We demonstrate that sweet spot positions of left-ventricular blood volume-time curves, as determined by automated segmentation algorithms, are in good agreement with strain sweet spot positions of mid-ventricular short axis slices, thus eliminating the need for additional strain measurements and analysis for measurement planning.

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