International audienceDynamic imaging of the vocal tact is important for modeling speechthrough the acoustic-articulatory relation. The average duration of each sound isabout 80ms. Movements of each articulator, in particular the tongue, should becaptured with sufficient precision. Current clinical techniques use X-ray videofluoroscopy which involves ionizing radiation. Real-time MRI allows direct recordingof speech motion [1] but is intrinsically limited in terms of resolution and SNR.Synchronization of MRI with an acoustic device is possible [2] but requires motion ofvocal system to be highly reproducible. In this work we propose an optimized setupfor achieving dynamic MRI of speech with high spatial and temporal resolution basedon a combination of: an MR-compatible acoustic device allowing simultaneousrecording of speech during MRI; and a retrospectively gated, motion-compensatedimage reconstruction that can deal with the variability of the subject repeating thesame sentence over the acquisition
