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Proceedings Paper

Vocal tract imaging: a comparison of MRI and EBCT
Author(s): Brad H. Story; Eric A. Hoffman; Ingo R. Titze
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Paper Abstract

Vocal tract imaging for the vowels /i/ and /a/ using both EBCT and MRI was carried out for one subject (29 yr old male, native of midwestern United States) using an Imatron C-150 electron beam CT scanner and a GE Signa 1.5 Tesla scanner, respectively. Each image set was analyzed using a general display and quantitation package called VIDATM (Volumetric Image Display and Analysis). The image analysis consisted of segmenting the airspace from the surrounding tissue, obtaining a 3D vocal tract shape via shape based interpolation, and finally using an iterative bisection algorithm to determine the vocal tract area function. The results show that the 3D representations of the vocal tract shapes derived from EBCT show subtle deformations of the airway by articulatory structures and teeth that are not observed in the MRI based representations. Shaded surface renderings of each vocal tract shape and for each imaging technique are shown and the apparent trade-offs between the two imaging methods are discussed.

Paper Details

Date Published: 8 April 1996
PDF: 14 pages
Proc. SPIE 2709, Medical Imaging 1996: Physiology and Function from Multidimensional Images, (8 April 1996); doi: 10.1117/12.237859
Show Author Affiliations
Brad H. Story, National Ctr. for Voice and Speech, Univ. of Iowa (United States)
Eric A. Hoffman, Univ. of Iowa College of Medicine (United States)
Ingo R. Titze, National Ctr. for Voice and Speech, Univ. of Iowa (United States)


Published in SPIE Proceedings Vol. 2709:
Medical Imaging 1996: Physiology and Function from Multidimensional Images
Eric A. Hoffman, Editor(s)

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