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Abstract #0506

Real-time Cardiac MRI during Exercise with Radial Sampling and Compressed Sensing: Evaluation in a Numerical Phantom and In-Vivo

Philip A Corrado1, Daniel Seiter1, Christopher J Fran├žois2, Farhan Raza1, Kevin Johnson1, and Oliver Wieben1
1University of Wisconsin-Madison, Madison, WI, United States, 2Mayo Clinic, Rochester, MN, United States

We used radial sampling, parallel imaging, and compressed sensing for real-time cardiac MRI during exercise, comparing the performance of two temporal resolutions for this approach in a numerical phantom and in a human volunteer. We found the approach feasible with sufficient spatial and temporal resolution to capture myocardial motion. While a longer temporal resolution with 30 radial spokes provides better image quality during rest, shortening the temporal resolution by acquiring just 20 spokes can improve results during exercise by better capturing rapid motion such as late diastolic filling.

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