On 6/9/14 7:10 PM, shahin@nmr.mgh.harvard.edu wrote:

Hi, I have two questions about mri_segstats. I want to measure the surface area of a functionally-defined ROI. I used the mri_segstats as below and I want to be sure that it is correct. Please note that ROIs were defined in the native space.

mri_segstats --i $SUBJECTS_DIR/SBJ1/surf/rh.area --slabel SBJ1 rh rh.FFA --sum SBJ1.txt --accumulate

That looks right to me

The second question is about the report file.  I assume that the 'Mean'

value for seg0001 is the measured surface area of my ROI in this particular subject. But what is the meaning of 'StdDev', 'Min', 'Max' and 'Range' in this report?

That is just the stddev, etc, of the list of areas of the vertices in the region

Also, is 'Mean' value for Seg0000, the surface area of the whole (right or left) cortex? If no, how can I measure the whole rh or lh cortex surface area?

That will be for all vertices not in the ROI. You can exclude it from the report with --excludeid 0. If you want total for cortex, then pass it the cortex label instead doug

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