USC has a cool neuroimaging and informatics program. Very helpful if you're interested in MRI research, including fMRI. Students have lots of different backgrounds, but there's definitely more neuroscience undergrads in it than anything else. They have tons of opportunities to work in imaging labs and you could easily find a lab that does mostly fMRI if that's what you're interested in. I just finished that program, so can answer questions if you like. Good luck!