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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