Radiographic Magnification on Videofluoroscopy: An Important Variable to Consider for Scaled Analyses of Swallowing.
Purpose: Traditionally, kinematic measures on videofluoroscopy require the use of an external scalar (such as a penny) to transform pixels to absolute distances. Videofluoroscopy is subject to image magnification based on the distance of the feature of interest to the X-ray source. However, the impa...
| Publicado en: | Journal of Speech, Language & Hearing Research Vol. 67; no. 1; pp. 126 - 132 |
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| Autores principales: | , , |
| Formato: | Artículo |
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American Speech-Language-Hearing Association
Jan2024
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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=174704264&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 174704264 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: Jan2024 vid: 67 iid: 1 pid: 42 pub: American Speech-Language-Hearing Association artinfo: ui: 174704264 10.1044/2023_JSLHR-23-00430 ppf: 126 ppct: 6 formats: fmt: @attributes: type: P size: 1.4MB tig: atl: Radiographic Magnification on Videofluoroscopy: An Important Variable to Consider for Scaled Analyses of Swallowing. aug: au: Molfenter, Sonja M. Jones-Rastelli, Rebecca Brynn Balou, Matina affil: Department of Communicative Sciences and Disorders, New York University Steinhardt, New York City. Rusk Rehabilitation, NYU Langone Health, New York City. Department of Otolaryngology—Head & Neck Surgery, NYU Langone Health, New York City. su: Reliability (Personality trait) Radiographic magnification Disease progression Deglutition Confidence intervals Fluoroscopy Comparative studies Intraclass correlation Neck Computed tomography Kinematics sug: subj: Reliability (Personality trait) Irradiation Apparatus Manufacturing Radiographic magnification Disease progression Deglutition Confidence intervals Fluoroscopy Comparative studies Intraclass correlation Neck Computed tomography Kinematics ab: Purpose: Traditionally, kinematic measures on videofluoroscopy require the use of an external scalar (such as a penny) to transform pixels to absolute distances. Videofluoroscopy is subject to image magnification based on the distance of the feature of interest to the X-ray source. However, the impact of the position/location of the external scalar on swallowing measures is unknown. Our goal was to systematically investigate the accuracy of various common external scalar locations in lateral and anterior–posterior (A-P) view. Method: U.S. pennies were taped to a styrofoam head in three positions (on the left and right lateral neck and in midline submentally). Locations were measured to ensure equal left and right, as well as midline, placement. A metal screwdriver (6 mm in diameter) was inserted into the premanufactured hole that is centrally located at the bottom of the styrofoam head. The head was centered on a medical tray and placed in the middle of a Siemens Alpha C-arm Fluoroscope field. ImageJ was used to measure penny length in pixels (three locations) in both lateral and A-P views. Penny length was known (19.05 mm), and, therefore, used to derive screwdriver size (for each location) for comparison to the actual screwdriver size. Results: All scalars overestimated the screwdriver size ranging from 6.55 to 7.87 mm, representing a 9%–31% inflation. Scalars closer to the X-ray source had the largest magnification. Conclusions: Our results confirm that image magnification of external scalars is a significant source of variability that is currently unaccounted for in the swallowing literature. Recommendations for future research design/measurement methods are provided. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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