Dear SPM/DARTEL fans,
I would like to use DARTEL together with spm_HDW within the framework of a
longitudinal VBM analysis. First, I followed John's recommendations and
generated FU=>BASE deformation fields using HDW and warped the FU to the
BASE images. I created soft mean images of the warped FU and the baseline
volumes and segmented these using Christian Gaser's VBM toolbox (the
improved SNR really made nice segments).
The segmented images as well as the FU=>BASE jacobians were imported to
DARTEL by means of the import_for_dartel.m script (=> r_GM,r_WM,
r_Jacobians). After template creation (using r_GM and r_WM segments), I
would go on to warp the r_GM, r_WM and r_Jacobians by applying the
respective flows to these images. Then, I would modulate wr_GM and wr_WM
with wr_Jacobian (imcalc: i1.*(i2-1)). Finally, I would use the affine
transform to map the modulated data to the MNI space. Is this protocol OK or
any other suggestions?
Any help or comment would be greatly appreciated.