Data:FreeData

Several sources have made data available for medical image computing research:

fBIRN

fMRI data of 5 healthy subjects scanned multiple times at 10 sites:

http://www.nbirn.net/Resources/Downloads/fBIRN_PhaseI/index.htm

JHU DTI

Susumu Mori's DTI healty subject archive at JHU:

http://lbam.med.jhmi.edu/

NLM Mayo Collection

A variety of high resolution scans acquired at Mayo clinic and made available by the National Library of Medicine:

http://nova.nlm.nih.gov/Mayo/