Phasegram analysis of vocal fold vibration documented with laryngeal high-speed video endoscopy.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F16%3A33161341" target="_blank" >RIV/61989592:15310/16:33161341 - isvavai.cz</a>

Result on the web

<a href="http://www.sciencedirect.com/science/article/pii/S089219971500257X" target="_blank" >http://www.sciencedirect.com/science/article/pii/S089219971500257X</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jvoice.2015.11.006" target="_blank" >10.1016/j.jvoice.2015.11.006</a>

Result language

angličtina

Original language name

Phasegram analysis of vocal fold vibration documented with laryngeal high-speed video endoscopy.

Original language description

In a recent publication, the phasegram, a bifurcation diagram over time, has been introduced as an intuitive visualization tool for assessing the vibratory states of oscillating systems. Here, this nonlinear dynamics approach is augmented with quantitative analysis parameters, and it is applied to clinical laryngeal high-speed video (HSV) endoscopic recordings of healthy and pathological phonations. METHODS: HSV data from a total of 73 females diagnosed as healthy (n=42), or with functional dysphonia (n=15) or with unilateral vocal fold paralysis (n=16), were quantitatively analyzed. Glottal area waveforms (GAW) and left and right hemi-GAWs (hGAW) were extracted from the HSV recordings. Based on Poincare sections through phase space-embedded signals, two novel quantitative parameters were computed: the phasegram entropy (PE) and the phasegram complexity estimate (PCE), inspired by signal entropy and correlation dimension computation, respectively. Both PE and PCE assumed higher average values (suggesting more irregular vibrations) for the pathological as compared with the healthy participants, thus significantly discriminating healthy group from the paralysis group (P=0.02 for both PE and PCE). Comparisons of individual PE or PCE data for the left and the right hGAW within each subject resulted in asymmetry measures for the regularity of vocal fold vibration. The PCE-based asymmetry measure revealed significant differences between the healthy group and the paralysis group (P=0.03). Quantitative phasegram analysis of GAW and hGAW data is a promising tool for the automated processing of HSV data in research and in clinical practice.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BO - Biophysics

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Voice

ISSN

0892-1997

e-ISSN

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Volume of the periodical

30

Issue of the periodical within the volume

6

Country of publishing house

US - UNITED STATES

Number of pages

15

Pages from-to

"771.e1"-"771.e15"

UT code for WoS article

000392619200070

EID of the result in the Scopus database

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