8th International Conference on Spoken Language Processing

Jeju Island, Korea
October 4-8, 2004

From Real-Time MRI to 3D tongue Movements

Olov Engwall

KTH, Sweden

Real-time Magnetic Resonance Imaging (MRI) at 9 images/s of the midsagittal plane is used as input to a three-dimensional tongue model, previously generated based on sustained articulations imaged with static MRI. The aim is two-fold, firstly to use articulatory inversion to extrapolate the midsagittal tongue movements to threedimensional movements, secondly to determine the accuracy of the tongue model in replicating the real-time midsagittal tongue shapes. The evaluation of the inversion shows that the real-time midsagittal contour is reproduced with acceptable accuracy. This means that the 3D model can be used to represent real-time articulations, eventhough the artificially sustained articulations on which it was based were hyperarticulated and had a backward displacement of the tongue.

Full Paper

Bibliographic reference.  Engwall, Olov (2004): "From real-time MRI to 3d tongue movements", In INTERSPEECH-2004, 1109-1112.