Journal
BEHAVIOR RESEARCH METHODS
Volume 48, Issue 2, Pages 614-620Publisher
SPRINGER
DOI: 10.3758/s13428-015-0605-0
Keywords
Wide-field retinotopy; fMRI; Visual projection system
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Funding
- European Research Council [338866] Funding Source: Medline
- European Research Council (ERC) [338866] Funding Source: European Research Council (ERC)
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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.
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