A low-cost and versatile system for projecting wide-field visual stimuli within fMRI scanners

Year: 2016

Authors: Greco V., Frijia F., Mikellidou K., Montanaro D., Farini A., D’Uva M., Poggi P., Pucci M., Sordini A., Morrone M.C., Burr D.C.

Autors Affiliation: National Institute of Optics, National Research Council, Florence, Italy
Fondazione CNR/Regione Toscana G. Monasterio, Pisa, Italy
Department of Translational Research on New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
Department of Neuroscience, Psychology, Pharmacology and Child Health, University of Florence, Florence, Italy
Institute of Neuroscience, National Research Council, Pisa, Italy Stella Maris Scientific Institute, Pisa, Italy

Abstract: We have constructed and tested a custom-made magnetic-imaging-compatible visual projection system designed to project on a very wide visual field (similar to 80 degrees). A standard projector was modified with a coupling lens, projecting images into the termination of an image fiber. The other termination of the fiber was placed in the 3-T scanner room with a projection lens, which projected the images relayed by the fiber onto a screen over the head coil, viewed by a participant wearing magnifying goggles. To validate the system, widefield stimuli were presented in order to identify retinotopic visual areas. The results showed that this low-cost and versatile optical system may be a valuable tool to map visual areas in the brain that process peripheral receptive fields.


Volume: 48 (2)      Pages from: 614  to: 620

More Information: DOI 10.3758/s13428-015-0605-0
KeyWords: Optical design; projecting wide-field visual stimuli; fMRI scanner
DOI: 10.3758/s13428-015-0605-0

Citations: 12
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