On 08/13/2014 02:11 PM, Krieger, Donald N. wrote:
mri_annotation2label enables extraction of vectors from .annot files to .label files, one file per label.
One may choose orig, white, or pial vectors.
(1)orig vectors are on the cortical surface. The gray scale value for each of these is that of gray matter, correct? And these are inside the pia and outside “white,” correct?
orig is the first surface created by tessellating the white matter. It is a coarse, jagged surface on the voxel boundary. The white is the orig refined to follow the GM/WM boundary better. The orig is definitely inside the pia, but one cannot make a statement about its position relative to the white. I don't know what you mean by the gray scale value. The surface just has xyz values and lists of nearest neighbors.
(2)white vectors are at the surface of the white matter just below the “orig” layer, correct? Their gray scale value is that of white matter, correct?
Thanks,
Don
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