Pixel-Based Swallow Measurements: Correcting Nonsquare Pixels.
Purpose: This research note illustrates the effects of video data with nonsquare pixels on the pixel-based measures obtained from videofluoroscopic swallow studies (VFSS). Method: Six pixel-based distance and area measures were obtained from two different videoflouroscopic study units; both yielding...
| Publicado en: | Journal of Speech, Language & Hearing Research Vol. 66; no. 2; pp. 565 - 573 |
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| Autores principales: | , , , , , , |
| Formato: | Artículo |
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American Speech-Language-Hearing Association
Feb2023
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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=161890552&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 161890552 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: Feb2023 vid: 66 iid: 2 pid: 42 pub: American Speech-Language-Hearing Association artinfo: ui: 161890552 10.1044/2022_JSLHR-22-00306 ppf: 565 ppct: 8 formats: fmt: @attributes: type: P size: 709KB tig: atl: Pixel-Based Swallow Measurements: Correcting Nonsquare Pixels. aug: au: Larsen, Deirdre Takeshi Ikuma Neubig, Luisa Kist, Andreas M. Leonard, Rebecca McWhorter, Andrew J. Kunduk, Melda affil: Department of Communication Sciences and Disorders, Louisiana State University, Baton Rouge Our Lady of the Lake Voice Center, Baton Rouge, LA Department of Otolaryngology-Head and Neck Surgery, Louisiana State University Health Sciences Center, New Orleans Department Artificial Intelligence in Biomedical Engineering, Friedrich-Alexander-Universität, Erlangen, Germany Department of Otolaryngology - Head and Neck Surgery, University of California, Davis Medical Center, Sacramento su: Analysis of variance Digital image processing Statistics Computer software Deglutition Research evaluation Multivariate analysis Effect sizes (Statistics) Deglutition disorders Fluoroscopy Cronbach's alpha Descriptive statistics Intraclass correlation Data analysis Video recording sug: subj: Analysis of variance Computer, computer peripheral and pre-packaged software merchant wholesalers Computer and Computer Peripheral Equipment and Software Merchant Wholesalers Computer and software stores Software publishers (except video game publishers) Digital image processing Statistics Computer software Deglutition Research evaluation Multivariate analysis Effect sizes (Statistics) Deglutition disorders Fluoroscopy Cronbach's alpha Descriptive statistics Intraclass correlation Data analysis Video recording ab: Purpose: This research note illustrates the effects of video data with nonsquare pixels on the pixel-based measures obtained from videofluoroscopic swallow studies (VFSS). Method: Six pixel-based distance and area measures were obtained from two different videoflouroscopic study units; both yielding videos with nonsquare pixels with different pixel aspect ratios (PARs). The swallowing measures were obtained from the original VFSS videos and from the videos after their pixels were squared. Results: The results demonstrated significant multivariate effects both in video type (original vs. squared) and in the interaction between video type and sample (two video recordings of different patients, different PARs, and opposing tilt angles of the external reference). A wide range of variabilities was observed on the pixel-based measures between original and squared videos with the percent deviation ranging from 0.1% to 9.1% with the maximum effect size of 7.43. Conclusions: This research note demonstrates the effect of disregarding PAR to distance and area pixel-based parameters. In addition, we present a multilevel roadmap to prevent possible measurement errors that could occur. At the planning stage, the PAR of video source should be identified, and, at the analyses stage, video data should be prescaled prior to analysis with PAR-unaware software. No methodology in prior absolute or relative pixel-based studies reports adjustment to the PAR prior to measurements nor identify the PAR as a possible source of variation within the literature. Addressing PAR will improve the precision and stability of pixel-based VFSS findings and improve comparability within and across clinical and research settings. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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