Hi Martin, it will dilate by one neighbor in the mess, regardless of distance. The neighbors start out about 1mm apart, but there is some variation (which is why it won't end up being exactly circular).
cheers, Bruce On Sat, 7 Nov 2009, Martin Kavec wrote: > :) > thanks. In volume images dilation is usually by 1 voxel, but as far as I > understand, label is a surface represented by a mesh where a distance > between vertices does not need to be the same. So if I want to dilate the > label by 10 mm do I click "dilate label" 10x. > > Thanks, > > Martin > > On Sat, Nov 7, 2009 at 8:36 PM, Bruce Fischl > <fis...@nmr.mgh.harvard.edu>wrote: > >> once every time you click "dilate label" >> >> On Sat, 7 Nov 2009, Martin Kavec wrote: >> >> Hi Bruce, >>> >>> if I dilate an arbitrarily shaped label in tksurfer, how much is it >>> actually >>> dilated? >>> >>> Thanks, >>> Martin >>> >>> On Sat, Nov 7, 2009 at 8:18 PM, Bruce Fischl <fis...@nmr.mgh.harvard.edu >>>> wrote: >>> >>> Hi Yigal, >>>> >>>> yes, you can select the vertex, make a label out of it, then dilate it >>>> however many times you want. This will be approximately spherical. >>>> Alternatively you could write some code to use the ?h.sphere surface to >>>> compute geodesic distances (great circles) to do it more exactly, but we >>>> don't have anything that will do that (easy enough to do in matlab >>>> though). >>>> >>>> cheers >>>> Bruce >>>> >>>> >>>> On Sat, >>>> 7 Nov 2009, Yigal Agam wrote: >>>> >>>> Hi, >>>>> >>>>> In surface-based analysis, is it possible to create an ROI label that is >>>>> a circle of a certain radius around a given vertex? >>>>> >>>>> Thanks, >>>>> Yigal >>>>> _______________________________________________ >>>>> 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
