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[3D visualization and analysis of vocal fold dynamics].

C Bohr1, M Döllinger2, S Kniesburges2

  • 1Abteilung für Phoniatrie und Pädaudiologie an der Hals-Nasen-Ohren-Klinik, Kopf- und Halschirurgie, Universitätsklinikum Erlangen, Bohlenplatz 21, 91054, Erlangen, Deutschland. christopher.bohr@uk-erlangen.de.

HNO
|February 5, 2016
PubMed
Summary

This study introduces a novel 3D vocal fold dynamics reconstruction method using high-speed cameras and laser projection. This technique captures crucial vertical movements, enhancing our understanding of phonation.

Keywords:
3D surface reconstructionHigh speed imagingLaser projection systemVocal foldsVoice diagnostic

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Area of Science:

  • Biomedical Engineering
  • Laryngology
  • Acoustic Analysis

Background:

  • Current larynx visualization methods offer limited 2D views of 3D vocal fold dynamics.
  • The vertical dynamics of vocal folds, crucial for phonation, are often overlooked.
  • Recent research highlights the significance of vertical vocal fold dynamics, comparable to lateral movements.

Purpose of the Study:

  • To present a method for 3D reconstruction and visualization of vocal fold dynamics.
  • To enable quantitative analysis of vocal fold motion during phonation.

Main Methods:

  • Utilized a high-speed camera (HSC) and a laser projection system (LPS).
  • Projected a grid onto vocal fold surfaces for 3D reconstruction.
  • Validated the method on ex-vivo human, porcine, and synthetic larynges.

Main Results:

  • Successfully reconstructed visible vocal fold surfaces in 3D for each oscillation.
  • Enabled detailed analysis of 3D vocal fold dynamics, including displacements and velocities.
  • Provided quantitative data on vocal fold motion.

Conclusions:

  • The developed setup facilitates comprehensive 3D analysis of vocal fold dynamics.
  • Future work aims to miniaturize the laser projection system for in-vivo clinical use.
  • Anticipates new insights into the relationship between 3D dynamics and voice quality in healthy and disordered phonation.