| Item type: | Article | ||||
|---|---|---|---|---|---|
| Höhe Gebühr (aus OpenAPC): | 1699.71 | ||||
| Institution der Zahlung: | Erlangen Nuernberg U | ||||
| Journal or Publication Title: | PLOS ONE | ||||
| Publisher: | PLOS | ||||
| Place of Publication: | SAN FRANCISCO | ||||
| Volume: | 14 | ||||
| Number of Issue or Book Chapter: | 4 | ||||
| Page Range: | e0215168 | ||||
| Date: | 2019 | ||||
| Institutions: | Medicine > Lehrstuhl für Hals-Nasen-Ohren-Heilkunde | ||||
| Identification Number: |
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| Keywords: | VOCAL FOLD VIBRATIONS; FUNDAMENTAL-FREQUENCY; IMAGE-RESOLUTION; VOICE QUALITY; OPEN QUOTIENT; WAVE; DYNAMICS; VARIABILITY; ASYMMETRY; FEATURES; | ||||
| Dewey Decimal Classification: | 600 Technology > 610 Medical sciences Medicine | ||||
| Status: | Published | ||||
| Refereed: | Yes, this version has been refereed | ||||
| Created at the University of Regensburg: | Yes | ||||
| Item ID: | 48759 |
Web of ScienceAbstract
In laryngeal high-speed videoendoscopy (HSV) the area between the vibrating vocal folds during phonation is of interest, being referred to as glottal area waveform (GAW). Varying camera resolution may influence parameters computed on the GAW and hence hinder the comparability between examinations. This study investigates the influence of spatial camera resolution on quantitative vocal fold ...
Abstract
In laryngeal high-speed videoendoscopy (HSV) the area between the vibrating vocal folds during phonation is of interest, being referred to as glottal area waveform (GAW). Varying camera resolution may influence parameters computed on the GAW and hence hinder the comparability between examinations. This study investigates the influence of spatial camera resolution on quantitative vocal fold vibratory function parameters obtained from the GAW. In total 40 HSV recordings during sustained phonation (20 healthy males and 20 healthy females) were investigated. A clinically used Photron Fastcam MC2 camera with a frame rate of 4000 fps and a spatial resolution of 512x256 pixels was applied. This initial resolution was reduced by pixel averaging to (1) a resolution of 256x128 and (2) to a resolution of 128x64 pixels, yielding three sets of recordings. The GAW was extracted and in total 50 vocal fold vibratory parameters representing different features of the GAW were computed. Statistical analyses using SPSS Statistics, version 21, was performed. 15 Parameters showing strong mathematical dependencies with other parameters were excluded from the main analysis but are given in the Supporting Information. Data analysis revealed clear influence of spatial resolution on GAW parameters. Fundamental period measures and period perturbation measures were the least affected. Amplitude perturbation measures and mechanical measures were most strongly influenced. Most glottal dynamic characteristics and symmetry measures deviated significantly. Most energy perturbation measures changed significantly in males but were mostly unaffected in females. In females 18 of 35 remaining parameters (51%) and in males 22 parameters (63%) changed significantly between spatial resolutions. This work represents the first step in studying the impact of video resolution on quantitative HSV parameters. Clear influences of spatial camera resolution on computed parameters were found. The study results suggest avoiding the use of the most strongly affected parameters. Further, the use of cameras with high resolution is recommended to analyze GAW measures in HSV data.
Metadata last modified: 03 Sep 2021 10:02
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