Abstract #3235

The importance of correcting for through-plane heart motion in the assessment of aortic regurgitation using PC-MRI as estimated by feature tracking cine-MRI

Frida Svensson^1,2, Alexander Johansson³, Åse Johnsson^2,3, and Kerstin Magdalena Lagerstrand^1,2

¹Dept. of Medical Physics and Techniques, Sahlgrenska University Hospital, Gothenburg, Sweden, Sahlgrenska University Hospital, Gothenburg, Sweden, ²Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden, ³Dept of Radiology, Sahlgrenska University Hospital, Gothenburg, Sweden, Sahlgrenska University Hospital

Phase contrast measurements are prone to velocity offsets due to through-plane motion of the heart. Here we examine the impact of these velocity offsets on the assessment of aortic regurgitation using a promising method for quantification of the through-plane heart motion. Without correction for through-plane heart motion, the phase contrast measurements significantly underestimated the severity of the regurgitation and the underestimation varied highly between individuals. This calls for development of reliable and robust methods, such as the proposed tracking method, for individual correction of through-plane heart motion in the phase contrast measurements.

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