Hi Doug I'm doing just that - creating a statistical probability map to look at the overlap across the 40 subjects for a given sulcus. When we do this volumetrically it is traditional to smooth using FWHM of 3mm (about the width of a sulcus). *I was told for surface data it needs to be more than this, but I do not want to over-smooth.* The command you gave me to do this back at the workshop in September was mris_fwhm. I just wanted to know what an acceptable FWHM value would be.
Trisanna -- Ph.D. Candidate McGill University Integrated Program in Neuroscience Psychology On Wed, May 24, 2017 at 5:08 PM, Douglas N Greve <gr...@nmr.mgh.harvard.edu> wrote: > not sure what you are trying to do or why you would want to smooth the > prob map > > > On 05/24/2017 05:03 PM, Trisanna Sprung-Much wrote: > > Hi there > > > > I labelled sulci in 40 T1 volumes and have created surface overlays > > using mri_vol2surf and then registered these to fsaverage using > > mri_surf2surf. I want to generate a statistical probability map using > > mri_concat and then mris_fwhm for each sulcus. What is an acceptable > > FWHM to use? It is the width of a sulcus on a pial surface of an > > individual brain, i.e. about 2mm? Or on fsaverage, i.e. about 7mm? > > > > Thanks > > Trisanna > > > > > > -- > > Ph.D. Candidate > > McGill University > > Integrated Program in Neuroscience > > Psychology > > > > > > > > > > _______________________________________________ > > Freesurfer mailing list > > Freesurfer@nmr.mgh.harvard.edu > > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > -- > Douglas N. Greve, Ph.D. > MGH-NMR Center > gr...@nmr.mgh.harvard.edu > Phone Number: 617-724-2358 > Fax: 617-726-7422 > > Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting > FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2 > www.nmr.mgh.harvard.edu/facility/filedrop/index.html > Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/ > > _______________________________________________ > 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.
