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Related Experiment Video

Updated: Mar 7, 2026

Coordinate Mapping of Hyolaryngeal Mechanics in Swallowing
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A Novel Imaging Analysis Method for Capturing Pharyngeal Constriction During Swallowing.

Ryan W Schwertner1, Kendrea L Garand2, William G Pearson1

  • 1Department of Cellular Biology & Anatomy, Medical College of Georgia, Augusta University, Augusta, GA.

Journal of Imaging Science
|February 28, 2017
PubMed
Summary
This summary is machine-generated.

This study introduces a reliable method to measure pharyngeal constrictors using Modified Barium Studies (MBS). This enhances computational analysis of swallowing mechanics for better patient assessment.

Keywords:
BiomechanicsDeglutitionDysphagiaImaging analysisMorphometricsVideofluoroscopy

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Area of Science:

  • Biomechanics of swallowing
  • Medical imaging analysis
  • Deglutition research

Background:

  • Modified Barium Study (MBS) is the standard for assessing swallowing difficulty and aspiration risk.
  • MBS contains valuable biomechanical data beyond aspiration assessment.
  • Computational analysis of swallowing mechanics (CASM) currently lacks pharyngeal constriction coordinates.

Purpose of the Study:

  • To develop and validate a method for locating superior and middle pharyngeal constrictors using MBS.
  • To integrate these new coordinates into CASM for comprehensive swallowing analysis.

Main Methods:

  • Utilized 20 normal MBS videos and a semi-automated MATLAB tracker.
  • Two raters annotated pharyngeal constrictor landmarks frame-by-frame at two time points.
  • Assessed inter-rater reliability using Intraclass Correlation Coefficients (ICC) and visualized coordinate interactions with MorphoJ software.

Main Results:

  • Achieved high test-retest reliability with ICC = 0.99 for all coordinates.
  • Demonstrated the successful integration of new pharyngeal constrictor coordinates into CASM.
  • Visualized the interaction of 12 coordinates in normal swallowing patterns.

Conclusions:

  • The new method reliably identifies pharyngeal constrictors from MBS imaging.
  • Adding these coordinates enhances CASM for robust analysis of swallowing mechanics.
  • This advancement supports detailed patient-specific and cohort studies using existing imaging data.