We are happy to announce the release of the Mindboggle-101 dataset, the largest and most complete set of free, publicly accessible, manually labeled human brain images in the world:  http://mindboggle.info/data/

This has special relevance to the FreeSurfer community, since we made use of FreeSurfer to extract and label surfaces, and to create surface templates and classifier atlases. We also adapted the Desikan-Killiany labeling protocol used by FreeSurfer.

An article describing the data and labeling protocol has just been published: 
http://www.frontiersin.org/brain_imaging_methods/10.3389/fnins.2012.00171/full

An excerpt of the abstract reads:
"To manually label the macroscopic anatomy in magnetic resonance images of 101 healthy participants, we created a new cortical labeling protocol that relies on robust anatomical landmarks and minimal manual edits after initialization with automated labels. The “Desikan–Killiany–Tourville” (DKT) protocol is intended to improve the ease, consistency, and accuracy of labeling human cortical areas. Given how difficult it is to label brains, the Mindboggle-101 dataset is intended to serve as brain atlases for use in labeling other brains, as a normative dataset to establish morphometric variation in a healthy population for comparison against clinical populations, and contribute to the development, training, testing, and evaluation of automated registration and labeling algorithms..."

Cheers,
@rno

arno klein
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research asst professor
psychiatry & behavioral science
stony brook university