Thank you Bruce. So what should I do. Shall I just take one of the mprage values or is it a good idea to get the average from two mprages for each structure. Can longitudinal run be helpful? Please suggest. Thank you! Rashmi
On 3/14/13 12:09 PM, "Bruce Fischl" <fis...@nmr.mgh.harvard.edu> wrote: >Hi Rashmi > >of course they are different - there is noise in the scans and motion and >other sources of corruption! The amount of difference will depend on the >structure and the quality of the data. > >cheers >Bruce >On Thu, 14 Mar 2013, Rashmi Singh >wrote: > >> Hello experts, >> I am doing volumetric studies where I am comparing the subcortical >> structures volumes among different experimental groups. >> I usually do two mprages on one subject in a single scan at two >> time-points. I run recon all on both mprages for a single subjects. To >>my >> surprise the volumes of same structure of a single subject calculated by >> freesurfer using two mprages are different. >> >> I did longitudinal run using the two mprages from same subject, however >>then >> also the volumes show differences. >> >> May you please advise me what to do. >> Thanks, >> Rashmi >> >> >> >> > > >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. _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
