Laryngeal High-Speed Videoendoscopy: Sensitivity of Objective Parameters towards Recording Frame RateReport as inadecuate




Laryngeal High-Speed Videoendoscopy: Sensitivity of Objective Parameters towards Recording Frame Rate - Download this document for free, or read online. Document in PDF available to download.

BioMed Research International - Volume 2016 2016, Article ID 4575437, 19 pages -

Research Article

Division for Phoniatrics and Pediatric Audiology, Department of Otorhinolaryngology, Head and Neck Surgery, Medical School, FAU-Erlangen-Nürnberg, Bohlenplatz 21, 91054 Erlangen, Germany

Department of Communication Sciences and Disorders, Louisiana State University, 64 Hatcher Hall, Baton Rouge, LA 70803, USA

Section of Experimental Oncology and Nanomedicine SEON, Department of Otorhinolaryngology, Head and Neck Surgery, Medical School, FAU-Erlangen-Nürnberg, Glückstrasse 10a, 91054 Erlangen, Germany

Received 6 July 2016; Accepted 10 October 2016

Academic Editor: Markus Hess

Copyright © 2016 Anne Schützenberger et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The current use of laryngeal high-speed videoendoscopy in clinic settings involves subjective visual assessment of vocal fold vibratory characteristics. However, objective quantification of vocal fold vibrations for evidence-based diagnosis and therapy is desired, and objective parameters assessing laryngeal dynamics have therefore been suggested. This study investigated the sensitivity of the objective parameters and their dependence on recording frame rate. A total of 300 endoscopic high-speed videos with recording frame rates between 1000 and 15 000 fps were analyzed for a vocally healthy female subject during sustained phonation. Twenty parameters, representing laryngeal dynamics, were computed. Four different parameter characteristics were found: parameters showing no change with increasing frame rate; parameters changing up to a certain frame rate, but then remaining constant; parameters remaining constant within a particular range of recording frame rates; and parameters changing with nearly every frame rate. The results suggest that 1 parameter values are influenced by recording frame rates and different parameters have varying sensitivities to recording frame rate; 2 normative values should be determined based on recording frame rates; and 3 the typically used recording frame rate of 4000 fps seems to be too low to distinguish accurately certain characteristics of the human phonation process in detail.





Author: Anne Schützenberger, Melda Kunduk, Michael Döllinger, Christoph Alexiou, Denis Dubrovskiy, Marion Semmler, Anja Seger, an

Source: https://www.hindawi.com/



DOWNLOAD PDF




Related documents