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help > RE: Overlay does not reflect t-scores
Jun 5, 2019 07:06 PM | Chris Rorden
RE: Overlay does not reflect t-scores
While the 'hide zeros' option will work in a pinch, for full
control of an overlay statistical map that has both positive and
negative values I would encourage loading the overlay twice. You
can then adjust the range and threshold independently for each
layer. You can do this with the graphical interface by adding
choosing File/AddOverlay twice and then selecting each layer in the
"Layers" box - set one to have darkest/brightest values that are
positive and the other with ranges that are negative.
You can also do this using a script. Below is a script for MRIcroGL 1.2.20190410. The attached image shows this. Here I have set the negative range to -1..+4 and the positive range to 1..4, but these do not need to be symmetrical.
import gl
gl.resetdefaults()
gl.loadimage('mni152')
#open overlay: show positive regions
gl.overlayload('masked_Perm_Zed_new.nii')
gl.minmax(1, 1, 4)
gl.overlayload('masked_Perm_Zed_new.nii')
gl.minmax(2, -1, -4)
You can also do this using a script. Below is a script for MRIcroGL 1.2.20190410. The attached image shows this. Here I have set the negative range to -1..+4 and the positive range to 1..4, but these do not need to be symmetrical.
import gl
gl.resetdefaults()
gl.loadimage('mni152')
#open overlay: show positive regions
gl.overlayload('masked_Perm_Zed_new.nii')
gl.minmax(1, 1, 4)
gl.overlayload('masked_Perm_Zed_new.nii')
gl.minmax(2, -1, -4)
Threaded View
Title | Author | Date |
---|---|---|
Irene Perini | Jun 4, 2019 | |
Chris Rorden | Jun 5, 2019 | |
Irene Perini | Jun 5, 2019 | |