Hi,
I am having trouble with the projfrac option in mri_label2vol (on the current dev freesurfer environment). When I use the following command:
mri_label2vol --annot label/lh.lang.annot --subject nmr00937 --o lang_seg.mgz --hemi lh --identity --temp mri/T1.mgz --proj frac 0 1 .01
I get many missed voxels from the gray matter (see the attached image, with the yellow representing the label overlaid on the ribbon.mgz). I have tried more extreme delta values and this doesn't help. (note scrolling to nearby slices indicates the neighboring voxels are included, so it isn't from the angle projecting oddly (that is why I took a slice from the middle of this large label)). Is there a better way to convert the annotation to a volume just in the gray matter, but including all of the relevant voxels?
Is there a fundamental algorithmic difference between mris_volmask and mri_label2vol?
If yes, why?
Thanks, D
