Abstract #0905

2.5D MRI of the Vocal Fold Oscillation using Single Point Imaging with Rapid Encoding

Johannes Fischer¹, Ali Caglar Özen^1,2, Matthias Echternach³, Louisa Traser⁴, 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, Freiburg University Medical Center, Germany Faculty of Medicine, University of Freiburg, Freiburg, Germany

Single point imaging with rapid encoding (SPIRE) can dynamically image the oscillations of the vocal folds in the coronal plane with sub-milisecond temporal resolution. To add spatial encoding in the third dimension, a slower frequency encoding gradient was applied in slice direction, where motion is minimal. Electroglottography and projection navigators are used to detect shifts in the larynx position, which are corrected during reconstruction. The velocity of the mucosal wave is estimated from the images.

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