Hi,
Could you confirm that the first value in the .vols output file from FIRST is the
number of voxels at a zero percent probablility threshold for spatial extent and
the second is that at 30% threshold? example for left caudate, approx 29,000
and 5000.
Also we're seeing volumes 2 to 3 times larger for the hippocampus using FIRST
relative to those generated by a manual method whereas caudate volumes are
more similar. Any insight into the possible reasons behind this would be
appreciated.
Thank you
Dara
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