Radiographic Magnification on Videofluoroscopy: An Important Variable to Consider for Scaled Analyses of Swallowing.
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| Title: | Radiographic Magnification on Videofluoroscopy: An Important Variable to Consider for Scaled Analyses of Swallowing. |
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| Authors: | Molfenter, Sonja M.1,2 smm16@nyu.edu, Jones-Rastelli, Rebecca Brynn1, Balou, Matina3 |
| Source: | Journal of Speech, Language & Hearing Research. Jan2024, Vol. 67 Issue 1, p126-131. 6p. |
| Subject Terms: | *Comparative studies, Radiographic magnification, Disease progression, Reliability (Personality trait), Deglutition, Confidence intervals, Fluoroscopy, Intraclass correlation, Neck, Computed tomography, Kinematics |
| Abstract: | 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. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Speech, Language & Hearing Research is the property of American Speech-Language-Hearing Association and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Education Research Complete |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
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| Header | DbId: ehh DbLabel: Education Research Complete An: 174704264 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Radiographic Magnification on Videofluoroscopy: An Important Variable to Consider for Scaled Analyses of Swallowing. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Molfenter%2C+Sonja+M%2E%22">Molfenter, Sonja M.</searchLink><relatesTo>1,2</relatesTo><i> smm16@nyu.edu</i><br /><searchLink fieldCode="AR" term="%22Jones-Rastelli%2C+Rebecca+Brynn%22">Jones-Rastelli, Rebecca Brynn</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Balou%2C+Matina%22">Balou, Matina</searchLink><relatesTo>3</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Speech%2C+Language+%26+Hearing+Research%22">Journal of Speech, Language & Hearing Research</searchLink>. Jan2024, Vol. 67 Issue 1, p126-131. 6p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Comparative+studies%22">Comparative studies</searchLink><br /><searchLink fieldCode="DE" term="%22Radiographic+magnification%22">Radiographic magnification</searchLink><br /><searchLink fieldCode="DE" term="%22Disease+progression%22">Disease progression</searchLink><br /><searchLink fieldCode="DE" term="%22Reliability+%28Personality+trait%29%22">Reliability (Personality trait)</searchLink><br /><searchLink fieldCode="DE" term="%22Deglutition%22">Deglutition</searchLink><br /><searchLink fieldCode="DE" term="%22Confidence+intervals%22">Confidence intervals</searchLink><br /><searchLink fieldCode="DE" term="%22Fluoroscopy%22">Fluoroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Intraclass+correlation%22">Intraclass correlation</searchLink><br /><searchLink fieldCode="DE" term="%22Neck%22">Neck</searchLink><br /><searchLink fieldCode="DE" term="%22Computed+tomography%22">Computed tomography</searchLink><br /><searchLink fieldCode="DE" term="%22Kinematics%22">Kinematics</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: 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. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Speech, Language & Hearing Research is the property of American Speech-Language-Hearing Association and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1044/2023_JSLHR-23-00430 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 6 StartPage: 126 Subjects: – SubjectFull: Comparative studies Type: general – SubjectFull: Radiographic magnification Type: general – SubjectFull: Disease progression Type: general – SubjectFull: Reliability (Personality trait) Type: general – SubjectFull: Deglutition Type: general – SubjectFull: Confidence intervals Type: general – SubjectFull: Fluoroscopy Type: general – SubjectFull: Intraclass correlation Type: general – SubjectFull: Neck Type: general – SubjectFull: Computed tomography Type: general – SubjectFull: Kinematics Type: general Titles: – TitleFull: Radiographic Magnification on Videofluoroscopy: An Important Variable to Consider for Scaled Analyses of Swallowing. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Molfenter, Sonja M. – PersonEntity: Name: NameFull: Jones-Rastelli, Rebecca Brynn – PersonEntity: Name: NameFull: Balou, Matina IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Text: Jan2024 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 10924388 Numbering: – Type: volume Value: 67 – Type: issue Value: 1 Titles: – TitleFull: Journal of Speech, Language & Hearing Research Type: main |
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