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 <sa...@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> > > > > _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
