Dynamic reconstruction of the oropharyngeal swallow using computer based animation

Shezhang Lin, Jim Chen, Paul Hertz, Peter J. Kahrilas*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


The oropharyngeal swallow was modeled with computer based animation using data from biplane videofluorographic and dynamic CT images of 10 ml liquid swallows of a volunteer subject. Tracings of oropharyngeal structures from synchronized, magnification adjusted, images of the posterior-anterior, lateral, and cross-sectional planes were aligned in three dimensions with graphics animation software. Twenty oropharyngeal configurations were created at 1/15 second intervals to dynamically illustrate the swallow. These three-dimensional reconfigurations could be sequenced into an animation routine. Software analysis of the model permitted quantification of structural movement and intrapharyngeal volume across time. Such analyses can be used to detail both the efficacy of individual functional elements of the swallow as well as global pump function. It is hoped that modeling the oropharyngeal swallow will be useful to analyze mechanisms of dysphagia and the mechanics of compensatory therapeutic strategies.

Original languageEnglish (US)
Pages (from-to)69-75
Number of pages7
JournalComputerized Medical Imaging and Graphics
Issue number2
StatePublished - 1996


  • Computer graphics
  • Deglutition
  • Oropharynx
  • Physiology
  • Radiology

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging
  • Computer Vision and Pattern Recognition
  • Health Informatics
  • Computer Graphics and Computer-Aided Design

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