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: CNR, Natl Inst Opt, Florence, Italy; Fdn CNR Reg Toscana G Monasterio, Pisa, Italy; Univ Pisa, Dept Translat Res New Technol Med & Surg, Pisa, Italy; Univ Florence, Dept Neurosci Psychol Pharmacol & Child Hlth, Florence, Italy; CNR, Inst Neurosci, Pisa, Italy; Stella Maris Sci Inst, 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.

Journal/Review: BEHAVIOR RESEARCH METHODS

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

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

Citations: 13
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