Hi Alberto
1. No, this is not the same. The control points are used to estimate the
bias field, which can affect an entire regions. Replacing a voxel in the
brainmask with a 110 will only affect that voxel.
2. You can do this if you want but you have to be careful how you edit.
When we turn something "off" we set it to 1, not 0 so we can track and
preserve it, and similarly when we turn it "on" we set it to 255.
cheers
Bruce
On Fri, 2 Oct 2015, Julio
Alberto González Torre wrote:
I have some questions about how to manually correct the white matter
regions.
It's the same manually edit the volume "brainmask.mgz" and use control
points? Would I get the same result? My intention is not to use control
points, but directly replace the voxels that have not been classified as
white matter with the value 110. Is it right to do this?
My second question is: Is it possible to edit the volumes with a third party
program? My intention here is to turn the volume "brainmask.mgz" to
"brainmask.nii" using "mri_convert" command. Then edit the values of the
voxels manually with a third party software or painting tool, and finally,
turn the volume back to "brainmask.mgz", replace the file in their
respective directory, and finally execute "-autorecon2- wm". Is it right to
do this? Or this may compromise my data?
Thanks in advance,
Alberto.
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