Generating 3D spatio-temporal models of vocal folds vibrations from high speed digital imaging
Bartosz Kopczyński, Paweł Strumiłło, Marcin Just, Ewa Niebudek-Bogusz · 2018
The oscillation process of the vocal folds that controls the air flow from the lungs is the underlying mechanism of human voice. Quantitative and qualitative voice assessment, allows for early detection of pathological changes of the vocal folds. In this study we focus on the analysis of high speed image sequences of the larynx during phonation. Using open-source tools such as Insight Segmentation and Registration Toolkit (ITK) and Visualization Toolkit (VTK), we have developed a methodology for automatic segmentation of the vocal folds edges movements and generation of a 3D spatio-temporal representation. The proposed geometrical model enables to calculate time indices (i.e. the opening and closing quotients and the proposed parameter named the Closure Difference Index (CDI)) for quantification of the oscillation process. This study, shows that the established geometrical model can contribute to more objective and accurate diagnosis method of voice disorders.