Ben might be using Oliver Lyttelton's mean MNI152 surface (i.e., the average of all 152 subjects' surfaces on the MNI mesh, as registered using CIVET).
On 09/09/2009 11:31 AM, Bruce Fischl wrote: > Hi Ben, > > I would be pretty surprised if you can get a reasonable surface from the > MNI152. I would have thought it was too blurry to distinguish many of the > gyri from one another. > > That said, if you do have one, you can make labels in the volume and sample > them onto the surface with tksurfer by just loading them. > > cheers, > Bruce > > On Tue, 8 Sep 2009 benjamin.d...@yale.edu wrote: > > >> Hi, >> >> I didn't generated the surface myself (a technician in my lab did), but I >> imagine it entailed the same process as for a subject, just using the MNI152 >> brain instead of a single individual's anatomical image. I'm hoping to find >> the location on this surface of several peak coordinates from past studies, >> so >> that I can present the results of an informal meta-analysis by drawing dots >> (or >> some such) at these locations on an image of the surface. Thanks, >> >> Ben >> >> Quoting Bruce Fischl <fis...@nmr.mgh.harvard.edu>: >> >> >>> Hi Ben, >>> >>> I'm still confused. How do you get a surface from an MNI average? Or is it >>> from the colin dataset? Can you tell us a bit more about what you are >>> trying to do so we can see if we can help? >>> >>> cheers, >>> Bruce >>> On Tue, 8 Sep 2009 benjamin.d...@yale.edu wrote: >>> >>> >>>> Hi, >>>> >>>> The surface isn't from an individual subject, but generated from MNI space >>>> itself. What exactly do you mean by sample it onto the surface? I could >>>> make >>>> an image file with value one at the coordinate of interest and zero >>>> elsewhere, >>>> and then overlay it on surface space and see where it lies, but it would >>>> be >>>> rather tedious to do this for each of the coordinates I'm interested in >>>> (about >>>> 30), so I'm wondering if there is a faster way. Granted, some of them may >>>> not >>>> lie on cortical surface. >>>> >>>> Ben >>>> >>>> Quoting Bruce Fischl <fis...@nmr.mgh.harvard.edu>: >>>> >>>> >>>>> Hi Ben, >>>>> >>>>> any given MNI coordinate may or may not be on the surface of a subject. >>>>> You can convert it to individual subject space then sample it onto the >>>>> surface. >>>>> >>>>> cheers, >>>>> Bruce >>>>> On Tue, 8 Sep 2009 benjamin.d...@yale.edu wrote: >>>>> >>>>> >>>>>> Hi, >>>>>> >>>>>> I'm wondering how to convert a single voxel coordinate in 2mm MNI152 >>>>>> space to a >>>>>> location on a cortical surface representation of MNI space generated by >>>>>> Freesurfer. My broader goal is to present a set of coordinates >>>>>> collected for a >>>>>> meta-analysis on surface space. Thanks, >>>>>> >>>>>> Ben Deen >>>>>> Department of Psychology, Yale University >>>>>> _______________________________________________ >>>>>> Freesurfer mailing list >>>>>> Freesurfer@nmr.mgh.harvard.edu >>>>>> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer >>>>>> >>>>>> >>>>>> >>>>>> >>>> >>>> >>>> >> >> >> > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer