Hi Michelle, do the eccen and polar maps look ok? Also, I would probably smooth them a little bit. The field sign calculation is basically a spatial derivative so it can be sensitive to noise. doug
Michelle Umali wrote: > Dear all, > I've been having issues with my fieldsign images all I get are > speckles. I did the following and did not get any errors: > > 1) ran recon-all -all > 2) cut and saved occipital patches (rh.occip.patch.3d) from inflated surface > 3) ran mris_flatten -w 0 distances 20 7 rh.occip.patch.3d rh.occip.patch.flat > 4)mkanalysis-sess -rtopy.self.rh -surface self rh -TR 2 -retinotopy 48 > paradigm > rtopy.par -nskip 4 fwhm 0 > 5) selxavg3-sess -a rtopy.self.rh -s sj09 > 6) fieldsign-sess -a rtopy.self.rh -occip -s sj09 > > When I looked at the fieldsign map using: > 7) tksurfer-sess -a rtopy.self.rh -s sj09 -fieldsign > > all I got were blue and red speckles. The polar and eccentricity maps > seemed ok. > > > Any help would be great. > > Michelle > _______________________________________________ > 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: www.nmr.mgh.harvard.edu/facility/filedrop/index.html _______________________________________________ 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.
