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A Low-Cost, Computer-Interfaced Drawing Pad for fMRI Studies of Dysgraphia and Dyslexia

We have developed a pen and writing tablet for use by subjects during fMRI scanning. The pen consists of two jacketed, multi-mode optical fibers routed to the tip of a hollowed-out ball-point pen. The pen has been further modified by addition of a plastic plate to maintain a perpendicular pen-tablet...

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Detalles Bibliográficos
Autores principales: Reitz, Frederick, Richards, Todd, Wu, Kelvin, Boord, Peter, Askren, Mary, Lewis, Thomas, Berninger, Virginia
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Molecular Diversity Preservation International (MDPI) 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3673127/
https://www.ncbi.nlm.nih.gov/pubmed/23595203
http://dx.doi.org/10.3390/s130405099
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author Reitz, Frederick
Richards, Todd
Wu, Kelvin
Boord, Peter
Askren, Mary
Lewis, Thomas
Berninger, Virginia
author_facet Reitz, Frederick
Richards, Todd
Wu, Kelvin
Boord, Peter
Askren, Mary
Lewis, Thomas
Berninger, Virginia
author_sort Reitz, Frederick
collection PubMed
description We have developed a pen and writing tablet for use by subjects during fMRI scanning. The pen consists of two jacketed, multi-mode optical fibers routed to the tip of a hollowed-out ball-point pen. The pen has been further modified by addition of a plastic plate to maintain a perpendicular pen-tablet orientation. The tablet is simply a non-metallic frame holding a paper print of continuously varying color gradients. The optical fibers are routed out of the MRI bore to a light-tight box in an adjacent control room. Within the box, light from a high intensity LED is coupled into one of the fibers, while the other fiber abuts a color sensor. Light from the LED exits the pen tip, illuminating a small spot on the tablet, and the resulting reflected light is routed to the color sensor. Given a lookup table of position for each color on the tablet, the coordinates of the pen on the tablet may be displayed and digitized in real-time. While simple and inexpensive, the system achieves sufficient resolution to grade writing tasks testing dysgraphic and dyslexic phenomena.
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spelling pubmed-36731272013-06-19 A Low-Cost, Computer-Interfaced Drawing Pad for fMRI Studies of Dysgraphia and Dyslexia Reitz, Frederick Richards, Todd Wu, Kelvin Boord, Peter Askren, Mary Lewis, Thomas Berninger, Virginia Sensors (Basel) Article We have developed a pen and writing tablet for use by subjects during fMRI scanning. The pen consists of two jacketed, multi-mode optical fibers routed to the tip of a hollowed-out ball-point pen. The pen has been further modified by addition of a plastic plate to maintain a perpendicular pen-tablet orientation. The tablet is simply a non-metallic frame holding a paper print of continuously varying color gradients. The optical fibers are routed out of the MRI bore to a light-tight box in an adjacent control room. Within the box, light from a high intensity LED is coupled into one of the fibers, while the other fiber abuts a color sensor. Light from the LED exits the pen tip, illuminating a small spot on the tablet, and the resulting reflected light is routed to the color sensor. Given a lookup table of position for each color on the tablet, the coordinates of the pen on the tablet may be displayed and digitized in real-time. While simple and inexpensive, the system achieves sufficient resolution to grade writing tasks testing dysgraphic and dyslexic phenomena. Molecular Diversity Preservation International (MDPI) 2013-04-17 /pmc/articles/PMC3673127/ /pubmed/23595203 http://dx.doi.org/10.3390/s130405099 Text en © 2013 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
spellingShingle Article
Reitz, Frederick
Richards, Todd
Wu, Kelvin
Boord, Peter
Askren, Mary
Lewis, Thomas
Berninger, Virginia
A Low-Cost, Computer-Interfaced Drawing Pad for fMRI Studies of Dysgraphia and Dyslexia
title A Low-Cost, Computer-Interfaced Drawing Pad for fMRI Studies of Dysgraphia and Dyslexia
title_full A Low-Cost, Computer-Interfaced Drawing Pad for fMRI Studies of Dysgraphia and Dyslexia
title_fullStr A Low-Cost, Computer-Interfaced Drawing Pad for fMRI Studies of Dysgraphia and Dyslexia
title_full_unstemmed A Low-Cost, Computer-Interfaced Drawing Pad for fMRI Studies of Dysgraphia and Dyslexia
title_short A Low-Cost, Computer-Interfaced Drawing Pad for fMRI Studies of Dysgraphia and Dyslexia
title_sort low-cost, computer-interfaced drawing pad for fmri studies of dysgraphia and dyslexia
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3673127/
https://www.ncbi.nlm.nih.gov/pubmed/23595203
http://dx.doi.org/10.3390/s130405099
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