Journal
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
Volume 121, Issue 1, Pages 491-504Publisher
ACOUSTICAL SOC AMER AMER INST PHYSICS
DOI: 10.1121/1.2363926
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Funding
- NATIONAL INSTITUTE ON DEAFNESS AND OTHER COMMUNICATION DISORDERS [R01DC001758] Funding Source: NIH RePORTER
- NIDCD NIH HHS [R01 DC01758] Funding Source: Medline
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A cine series of tagged magnetic resonance (MR) images of the tongue is used to measure tongue motion and its internal deformation during speech. Tagged images are collected in three slice orientations (sagittal, coronal, and axial) during repetitions of the utterance disouk (/disuk/). A new technique called harmonic phase MRI (HARP-MRI) is used to process the tagged MR images to measure the internal deformation of the tongue. The measurements include displacement and velocity of tissue points, principal strains, and strain in the line-of-action of specific muscles. These measurements are not restricted to tag intersections, but can be calculated at every pixel in the image. The different motion measurements complement each other in understanding the tongue kinematics and in hypothesizing the internal muscle activity of the tongue. (c) 2007 Acoustical Society of America.
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