A three-dimensional articulatory model of the velum and nasopharyngeal wall based on MRI and CT data
| Autor: | Antoine Serrurier, Pierre Badin |
|---|---|
| Přispěvatelé: | GIPSA - Machines Parlantes, Agents Communicants & Interaction Face-à-face (GIPSA-MPACIF), Département Parole et Cognition (GIPSA-DPC), Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Grenoble Images Parole Signal Automatique (GIPSA-lab), Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Stendhal - Grenoble 3-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2008 |
| Předmět: |
Acoustics and Ultrasonics
[SHS.INFO]Humanities and Social Sciences/Library and information sciences 01 natural sciences 030507 speech-language pathology & audiology 03 medical and health sciences Imaging Three-Dimensional Speech Production Measurement Arts and Humanities (miscellaneous) Nasopharynx 0103 physical sciences medicine Humans Speech 010301 acoustics PACS 43.70.Bk 43.70.Jt 43.70.Aj Mathematics medicine.diagnostic_test Oblique case Magnetic resonance imaging Anatomy 3d shapes Magnetic Resonance Imaging Manner of articulation Nasopharyngeal wall Coronal plane Tomography Palate Soft Tomography X-Ray Computed 0305 other medical science Articulation (phonetics) |
| Zdroj: | Journal of the Acoustical Society of America Journal of the Acoustical Society of America, Acoustical Society of America, 2008, 123 (4), pp.2335-2355. ⟨10.1121/1.2875111⟩ |
| ISSN: | 0001-4966 1520-8524 |
| DOI: | 10.1121/1.2875111 |
| Popis: | International audience; An original three-dimensional 3D linear articulatory model of the velum and nasopharyngeal wall has been developed from magnetic resonance imaging MRI and computed tomography images of a French subject sustaining a set of 46 articulations, covering his articulatory repertoire. The velum and nasopharyngeal wall are represented by generic surface triangular meshes fitted to the 3D contours extracted from MRI for each articulation. Two degrees of freedom were uncovered by principal component analysis: first, VL accounts for 83% of the velum variance, corresponding to an oblique vertical movement seemingly related to the levator veli palatini muscle; second, VS explains another 6% of the velum variance, controlling a mostly horizontal movement possibly related to the sphincter action of the superior pharyngeal constrictor. The nasopharyngeal wall is also controlled by VL for 47% of its variance. Electromagnetic articulographic data recorded on the velum fitted these parameters exactly, and may serve to recover dynamic velum 3D shapes. The main oral and nasopharyngeal area functions controlled by the articulatory model, complemented by the area functions derived from the complex geometry of each nasal passage extracted from coronal MRIs, were fed to an acoustic model and gave promising results about the influence of velum movements on the spectral characteristics of nasals. |
| Databáze: | OpenAIRE |
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