Hi.
On Thu, 28 Feb 2002, Darren Weber wrote:
> can any FSL tools provide tesselated surfaces of any of these: white
> matter, grey matter, CSF, skull (inner & outer) and scalp?
BET can output the tesselation of the brain surface (ie only a fairly
smooth, non-detailed, surface) with the -x option. eg
bet steve_struc_334 steve_struc_334_brain -x
then the steve_struc_334.coo file contains the co-ordinates of the
vertices, and the .dat file contains the details of the links between
vertices (each line corresponds to each vertex in the .coo file, and the
1's correspond to which other vertices they are connected to)
> I note with interest that BET can find not only the cortical or dura
> surface, but also the outer skull surface. Can you output the vertex
> points of this routine in ascii?
not for the skull - BET doesn't offer the option of doing the same for the
skull (it doesn't even model the skull as a surface, just as a sparse set
of voxel coordinates).
note - for much better surface tesselation stuff, look at FreeSurfer
http://surfer.nmr.mgh.harvard.edu/ which is explicitly for this kind of
thing.
Thanks, Steve.
Stephen M. Smith
Head of Image Analysis, FMRIB
Oxford University Centre for Functional MRI of the Brain
John Radcliffe Hospital, Headington, Oxford OX3 9DU, UK
+44 (0) 1865 222726 (fax 222717)
[log in to unmask] http://www.fmrib.ox.ac.uk/~steve
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