Dear All,
I've been thinking about the issue of modulation (non-linear versus affine+nonlinear) and it makes sense to only use the non-linear component alone. However, in DARTEL, flow fields are used and you it seems that SPM only allows you to warp by the determinant of the total.
Could one "remove" the affine modulation effects by using the affine component of the transform from the segmentation procedure (assuming the end result is in MNI space) that same way its removed in VBM toolbox OR does the "affine" portion change when DARTEL is used? If so, is there a way to extract it?
Best Regards, Donald McLaren
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D.G. McLaren
University of Wisconsin - Madison
Neuroscience Training Program
Office: (608) 520-0586
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