OPAL
The OPAL project at UBC is focused on MR imaging and computer modeling of oral, pharyngeal, and laryngeal anatomy. Research activities are directed towards analysis of upper-airway dysfunctions, such as Obstructive Sleep Apnea, swallowing disorders (dysphagia), and post-operative deficits following oral surgery. MR acquisition is performed at the UBC MRI Research Center and the biomechanical modeling is done with the ArtiSynth simulation toolkit.
During my PhD, I was active in both MR imaging of the upper airway and creating models of coupled jaw-tongue-hyoid biomechanics from medical imaging data. I have worked closely with a number of clinical collaborators and speech scientists.
Publications
Ian Stavness, JE Lloyd, and SS Fels. Automatic Prediction of Tongue Muscle Activations Using a Finite Element Model. Journal of Biomechanics, in press, 2012.
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Ian Stavness, MA Nazari, P Perrier, D Demolin, and Y Payan. A Biomechanical Modeling Study of the Effects of the Orbicularis Oris Muscle and Jaw Posture. Journal of Speech, Language, and Hearing Research, in press, 2012.
Ian Stavness, B Gick, D Derrick, and SS Fels. Biomechanical Modeling of English /r/ Variants. Journal of the Acoustical Society of America Express Letters, 131(5):355-360, 2012.
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Ian Stavness, JE Lloyd, Y Payan, and SS Fels. Towards Speech Articulation Simulation with a Dynamic Coupled Face-Jaw-Tongue Model.
International Symposium on Speech Production (ISSP '11), Poster, June 2011.
Ian Stavness, JE Lloyd, Y Payan, and SS Fels. Dynamic Hard-Soft Tissue Models for Orofacial Biomechanics.
ACM SIGGRAPH Talks, July 2010.
Ian Stavness, JE Lloyd, Y Payan, and SS Fels. Coupled Hard-Soft Tissue Simulation with Contact and
Constraints Applied to Jaw-Tongue-Hyoid Dynamics. International Journal for Numerical Methods in Biomedical Engineering, 27:367-390, 2011.
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Ian Stavness, AG Hannam, JE Lloyd, and SS Fels. Predicting muscle patterns for
hemimandibulectomy models. Computer Methods in Biomechanics and Biomedical Engineering, 13(4):483-491, 2010.
AG Hannam, Ian Stavness, JE Lloyd, SS Fels, A Miller, and D Curtis.
A comparison of simulated jaw dynamics in models of segmental mandibular resection versus resection with alloplastic reconstruction. Journal of Prosthetic Dentistry, 104(3):191-198, 2010.
AG Hannam, Ian Stavness, JE Lloyd, and SS Fels. A Dynamic Model of Jaw and Hyoid
Biomechanics during Chewing. Journal of Biomechanics, 41(5):1069-1076, 2008.