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Abstract #4744

Fast dynamic speech MRI at 3 Tesla using variable density spirals and constrained reconstruction

Sajan Goud Lingala1, Douglas Blake2, Stanley Kruger3, David Meyer4, Eileen Finnegan2, Ingo Titze2, and Eric Hoffman3

1Department of Biomedical Engineering, University of Iowa, Iowa city, IA, United States, 2Department of Communication Sciences and Disorders, University of Iowa, Iowa city, IA, United States, 3Department of Radiology, University of Iowa, Iowa city, IA, United States, 4Janette Ogg Voice Research Center, Shenandoah University, Winchester, VA, United States

We propose an ultra fast dynamic 3 T MRI scheme for imaging the vocal tract dynamics during speech production. Our approach synergistically exploits efficiency of variable density spirals for motion robustness, artifact suppression, and a sparse SENSE based temporal constrained reconstruction scheme. We realize time resolution of upto 6.2 ms/frame and a spatial resolution of 2.4x2.4 mm2. We demonstrate the utility of this scheme in capturing rapidly varying articulators during fast speech stimuli.

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