It's hard to know without the info about scanner type (Manufacturer/Field/Sequence) and FreeSurfer version.
I usually see 3-5% difference in measurements. Phillips 3T with common fSPGR. ---------------------------------------------------------- Pedro Paulo de M. Oliveira Junior Diretor de Operações Netfilter & SpeedComm Telecom -- For mobile: http://www.netfilter.com.br/mobile On Thu, Jun 10, 2010 at 12:03, <bla...@artsci.wustl.edu> wrote: > Hi All, > > Our group recently scanned subjects with two different scanners in order > to determine how reliable FreeSurfer comparisons between the two scanners > are. After putting each session through the regular cross-sectional > Freesurfer pipeline, we noticed that there is much greater variability > between the two scanners when we compare structures in the right > hemisphere than in the left. Is there any FreeSurfer related reason for > this? > > Also, we are currently running each subject through the longitudinal > pipeline (i.e. Scanner 1 as TP1, Scanner 2 as TP2). Is there any reason to > think that this will help reduce the variability seen between the two > scanners? > > Thanks in advance for any help. > > - Tyler Blazey > > > > _______________________________________________ > 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. > >
_______________________________________________ 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.
