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Eyetracker-based gaze correction for robust mapping of population receptive fields.
Hummer, A; Ritter, M; Tik, M; Ledolter, A A; Woletz, M; Holder, G E; Dumoulin, S O; Schmidt-Erfurth, U; Windischberger, C.
Afiliación
  • Hummer A; MR Centre of Excellence, Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria.
  • Ritter M; Department of Ophthalmology and Optometry, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria.
  • Tik M; MR Centre of Excellence, Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria.
  • Ledolter AA; Department of Ophthalmology and Optometry, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria.
  • Woletz M; MR Centre of Excellence, Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria.
  • Holder GE; Institute of Ophthalmology, University College London, 11-43 Bath Street, London, EC1V 2PD, UK; Moorfields Eye Hospital, 162 City Road, London, EC1V 9EL, UK.
  • Dumoulin SO; Experimental Psychology, Helmholtz Institute, Utrecht University, Heidelberglaan 1, 3584 CS Utrecht, The Netherlands; Spinoza Centre for Neuroimaging, Meibergdreef 75, 1105BK, Amsterdam, The Netherlands.
  • Schmidt-Erfurth U; Department of Ophthalmology and Optometry, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria.
  • Windischberger C; MR Centre of Excellence, Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria. Electronic address: christian.windischberger@meduniwien.ac.at.
Neuroimage ; 142: 211-224, 2016 Nov 15.
Article en En | MEDLINE | ID: mdl-27389789
Functional MRI enables the acquisition of a retinotopic map that relates regions of the visual field to neural populations in the visual cortex. During such a "population receptive field" (PRF) experiment, stable gaze fixation is of utmost importance in order to correctly link the presented stimulus patterns to stimulated retinal regions and the resulting Blood Oxygen Level Dependent (BOLD) response of the appropriate region within the visual cortex. A method is described that compensates for unstable gaze fixation by recording gaze position via an eyetracker and subsequently modifies the input stimulus underlying the PRF analysis according to the eyetracking measures. Here we show that PRF maps greatly improve when the method is applied to data acquired with either saccadic or smooth eye movements. We conclude that the technique presented herein is useful for studies involving subjects with unstable gaze fixation, particularly elderly patient populations.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Reconocimiento Visual de Modelos / Corteza Visual / Mapeo Encefálico / Imagen por Resonancia Magnética / Movimientos Oculares / Medidas del Movimiento Ocular / Percepción de Movimiento Límite: Adult / Female / Humans / Male Idioma: En Revista: Neuroimage Asunto de la revista: DIAGNOSTICO POR IMAGEM Año: 2016 Tipo del documento: Article País de afiliación: Austria Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Reconocimiento Visual de Modelos / Corteza Visual / Mapeo Encefálico / Imagen por Resonancia Magnética / Movimientos Oculares / Medidas del Movimiento Ocular / Percepción de Movimiento Límite: Adult / Female / Humans / Male Idioma: En Revista: Neuroimage Asunto de la revista: DIAGNOSTICO POR IMAGEM Año: 2016 Tipo del documento: Article País de afiliación: Austria Pais de publicación: Estados Unidos