Authors
Shrikanth Narayanan, Krishna Nayak, Sungbok Lee, Abhinav Sethy, Dani Byrd
Publication date
2004/4/1
Journal
The Journal of the Acoustical Society of America
Volume
115
Issue
4
Pages
1771-1776
Publisher
Acoustical Society of America
Description
Magnetic resonance imaging (MRI) has served as a valuable tool for studying static postures in speech production. Now, recent improvements in temporal resolution are making it possible to examine the dynamics of vocal-tract shaping during fluent speech using MRI. The present study uses spiral k-space acquisitions with a low flip-angle gradient echo pulse sequence on a conventional GE Signa 1.5-T CV/i scanner. This strategy allows for acquisition rates of 8–9 images per second and reconstruction rates of 20–24 images per second, making veridical movies of speech production now possible. Segmental durations, positions, and interarticulator timing can all be quantitatively evaluated. Data show clear real-time movements of the lips, tongue, and velum. Sample movies and data analysis strategies are presented.
Total citations
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Scholar articles
S Narayanan, K Nayak, S Lee, A Sethy, D Byrd - The Journal of the Acoustical Society of America, 2004