Hi Avi
1. the size of the triangles is currently specified more-or-less by the
resolution of the input data. We cover the surface of voxels.
2. The triangles start life as uniform, but then smoothing and topology
correction will make them different sizes. It's hard to predict where.
cheers
Bruce
On Wed, 22 Nov
2017, Avideh Gharehgazlou wrote:
Dear FreeSurfer experts,
I have a question regarding the tessellation step, in which the surface is
covered by a mesh of
triangles.
1. How would the number/sizes of triangles be affected/ alter as a result of
different brain
volumes/sizes of different subjects? i.e. would a subject with a bigger brain
volume have greater
number of triangles compared to a subject with a smaller brain volume? Or will
the subject have the
same number of triangles, but larger triangles instead?
2. I am aware that the triangles are not uniform like the voxels in a VBM...
within a particular
subject, how are the sizes of triangles determined in different parts of the
brain? What determines
which parts of the brain will have smaller/larger triangles compared to other
parts of the brain?
Would really appreciate your input,
Thanks,
Avi
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