Hi Satra
this seems vanishingly unlikely to me, particularly with partial volume correction. Have you visualize some of the subjects that have the same structure volume?
Bruce On Mon, 8 Jul 2013, Satrajit Ghosh wrote:
a quick update. the following fiddle will show the number of subjects that have an identical the same Right Amygdala volume. It simply plots a histogram of the counts per volume (scroll to the bottom of the result window). http://fiddle.jshell.net/satra/MXKY6/6/
cheers,
satra
On Mon, Jul 8, 2013 at 1:07 PM, Satrajit Ghosh satra@mit.edu wrote: hi,
trying to figure out the likelihood of identical subcortical volumes across individuals. i'm noticing this in some data processed with FreeSurfer 5.1.0.
just to give some probabilities - these are out of about 963 participants.
and there are several such small clusters of identical numbers - never exceeding 6 participants i believe.
cheers,
satra 0021003 aseg.stats http://freesurfer.net/fswiki/terms/Right-Hippocampus "4142.0"^^http://www.w3.org/2001/XMLSchema-datatypes#float 0015035 aseg.stats http://freesurfer.net/fswiki/terms/Right-Hippocampus "4142.0"^^http://www.w3.org/2001/XMLSchema-datatypes#float 3976121 aseg.stats http://freesurfer.net/fswiki/terms/Right-Hippocampus "4142.0"^^http://www.w3.org/2001/XMLSchema-datatypes#float 1623716 aseg.stats http://freesurfer.net/fswiki/terms/Right-Amygdala "1603.0"^^http://www.w3.org/2001/XMLSchema-datatypes#float 0023005 aseg.stats http://freesurfer.net/fswiki/terms/Right-Amygdala "1603.0"^^http://www.w3.org/2001/XMLSchema-datatypes#float 0023008 aseg.stats http://freesurfer.net/fswiki/terms/Right-Amygdala "1603.0"^^http://www.w3.org/2001/XMLSchema-datatypes#float 0027025 aseg.stats http://freesurfer.net/fswiki/terms/Right-Amygdala "1603.0"^^http://www.w3.org/2001/XMLSchema-datatypes#float 1341865 aseg.stats http://freesurfer.net/fswiki/terms/Right-Amygdala "1603.0"^^http://www.w3.org/2001/XMLSchema-datatypes#float 2947936 aseg.stats http://freesurfer.net/fswiki/terms/Right-Amygdala "1603.0"^^http://www.w3.org/2001/XMLSchema-datatypes#float