Influence of Perspective Distortion in Laryngoscopy.
Objective: An experiment with controllable boundaries was designed to assess the influence of the recording angle and distance on two-dimensional (2D) imaging in laryngoscopy and resulting 2D parameter calculation derived from the glottal area waveform (GAW). Method: Two high-speed camera setups wer...
| Publicado en: | Journal of Speech, Language & Hearing Research Vol. 66; no. 9; pp. 3276 - 3290 |
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| Autores principales: | , , |
| Formato: | Artículo |
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American Speech-Language-Hearing Association
Sep2023
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=171950373&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 171950373 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 10924388 1SM jtl: Journal of Speech, Language & Hearing Research issn: 10924388 maglogo: N pubinfo: dt: Sep2023 vid: 66 iid: 9 pid: 42 pub: American Speech-Language-Hearing Association artinfo: ui: 171950373 10.1044/2023_JSLHR-23-00027 ppf: 3276 ppct: 14 formats: fmt: @attributes: type: P size: 6.1MB tig: atl: Influence of Perspective Distortion in Laryngoscopy. aug: au: Veltrup, Reinhard Kniesburges, Stefan Semmler, Marion affil: University Hospital Erlangen, Medical School, Division of Phoniatrics and Pediatric Audiology at the Department of Otorhinolaryngology Head and Neck Surgery, Friedrich-Alexander-University Erlangen-Nürnberg, Germany su: Glottis Confidence intervals Vocal cords Regression analysis Diagnostic imaging Laryngoscopy sug: subj: Diagnostic Imaging Centers Other Electronic and Precision Equipment Repair and Maintenance Glottis Confidence intervals Vocal cords Regression analysis Diagnostic imaging Laryngoscopy ab: Objective: An experiment with controllable boundaries was designed to assess the influence of the recording angle and distance on two-dimensional (2D) imaging in laryngoscopy and resulting 2D parameter calculation derived from the glottal area waveform (GAW). Method: Two high-speed camera setups were used to synchronously record an oscillating synthetic vocal fold (VF) model, simulating a high-speed videoendoscopy. One camera recorded at variable lateral recording angles and a reference camera in superior perspective. This was performed at different physiological recording distances and for two oscillation modes (with/without contacting VFs). The GAW was derived from the segmented glottis, and two parameters each for the categories of symmetry, periodicity, and closure were calculated, as well as two derivative measures. The percentage difference between the variable and reference camera value pairs was calculated, and the angle and height dependencies were quantified using linear regression. Results: The visual perception of a laryngoscopy was found to be influenced by the lateral recording angle, which may lead to misinterpretation of VF symmetry among inexperienced observers. The strongest influence of recording angle was observed for symmetry parameters, the strongest being the Amplitude Symmetry Index with up to 2.6%/° (p < .05). A dependence on the recording distance was only found for the Maximum Area Declination Rate. Conclusions: The recording angle in 2D laryngoscopy should be carefully considered during visual inspection of the VF dynamics. Most of the investigated objective parameters were unaffected by the examined perspective distortion. However, especially left-right symmetry measures should only be used under controlled boundary conditions to avoid misdiagnosis and misinterpretation. Supplemental Material: https://doi.org/10.23641/asha.23961183 pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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