Hi,freesurfers:
Recently,I read a paper which used freesurfer to processed their data,this is the paper's link:http://www.plosbiology.org/article/info%3Adoi%2F10.1371%2Fjournal.pbio.00601... In this paper,the antor said : "One of the critical steps of the whole procedure was to partition the participants' cortex into ROIs located in an identical topographic position for each participant despite interindividual anatomical variation. We used Freesurfer to register a labeled mesh from an average brain onto the brain of each individual participant, where each label corresponded to one of 66 anatomical cortical regions . This output provided for every participant a standardized partition of the cortex into 66 regional areas. In a second step, each of these regional areas were subdivided on the Freesurfer average brain into a set of small and compact regions of about 1.5 cm2, resulting in 998 ROIs covering the entire cortex. This subdivision was then registered on the individual brain using the same transformation as for the 66 regional areas thus maintaining the topological constraints of mapping. Consequently, the resulting partitions of the cortex into 66 and 998 ROIs were in anatomically closely matched positions for all participants "
So,I wander how can we subdivided the 66 ROIs into 998 ROIs?
Thanks, wang