title: A low-cost and versatile system for projecting wide-field visual stimuli within fMRI scanners.
abstract: We have constructed and tested a custom-made magnetic-imaging-compatible visual projection system designed to project on a very wide visual field (~80°). 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, wide-field 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.
authors.affiliation: National Institute of Optics, National Research Council, Florence, Italy.
authors.forename: V
authors.initials: V
authors.lastname: Greco
authors.affiliation: Fondazione CNR/Regione Toscana G. Monasterio, Pisa, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Frijia
authors.affiliation: Department of Translational Research on New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy.
authors.forename: K
authors.initials: K
authors.lastname: Mikellidou
authors.affiliation: Fondazione CNR/Regione Toscana G. Monasterio, Pisa, Italy.
authors.forename: D
authors.initials: D
authors.lastname: Montanaro
authors.affiliation: National Institute of Optics, National Research Council, Florence, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Farini
authors.affiliation: National Institute of Optics, National Research Council, Florence, Italy.
authors.forename: M
authors.initials: M
authors.lastname: D'Uva
authors.affiliation: National Institute of Optics, National Research Council, Florence, Italy.
authors.forename: P
authors.initials: P
authors.lastname: Poggi
authors.affiliation: National Institute of Optics, National Research Council, Florence, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Pucci
authors.affiliation: National Institute of Optics, National Research Council, Florence, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Sordini
authors.affiliation: Department of Translational Research on New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy.
authors.forename: M C
authors.initials: MC
authors.lastname: Morrone
authors.affiliation: Department of Neuroscience, Psychology, Pharmacology and Child Health, University of Florence, Florence, Italy. dave@in.cnr.it.|Institute of Neuroscience, National Research Council, Pisa, Italy. dave@in.cnr.it.|Stella Maris Scientific Institute, Pisa, Italy. dave@in.cnr.it.
authors.forename: D C
authors.initials: DC
authors.lastname: Burr
mesh_terms: D000328:Adult; D001931:Brain Mapping; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging / Q000191:economics / Q000295:instrumentation* / Q000379:methods*; D008297:Male; D008875:Middle Aged; D010775:Photic Stimulation / Q000295:instrumentation* / Q000379:methods*; D015203:Reproducibility of Results; D014794:Visual Fields
keywords: Visual projection system; Wide-field retinotopy; fMRI