Abstract #0615

Sub-millisecond 2D MRI of the Vocal Fold Oscillation using Single Point Imaging with Rapid Encoding (SPIRE)

Johannes Fischer¹, Ali Caglar Özen^1,2, Matthias Echternach³, Bernhard Richter⁴, and Michael Bock¹

¹Dept. of Radiology, Medical Physics, Medical Center University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany, ²German Consortium for Translational Cancer Research Freiburg Site, German Cancer Research Center (DKFZ), Heidelberg, Germany, ³Division of Phoniatrics and Pediatric Audiology, Department of Otorhinolaryngology, Head and Neck Surgery, Ludwig-Maximilians-University, Munich, Germany, ⁴Institute of Musicians' Medicine, Medical Center University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany

We use single point imaging with rapid encoding (SPIRE) to image the vocal fold oscillations in the coronal plane. SPIRE is able to image fast, repetitive and two-dimensional motion, because the temporal resolution does not depend on TR but on the duration of the fast-switching phase encoding gradients, which is below one millisecond in this work. Data are gated using electroglottography and projection navigators are acquired during the sequence to detect shifts in larynx position which is corrected during reconstruction.

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