Dear SPMers
working with SPM8, I am trying to realign separately label and control images of pASL series (M0, L1, C1, L2, C2...etc), but the CBF I get look very bad (in comparison with one-step realignment procedure, among others).
I use the following steps – could you help me to find the mistake ?
- Realign label images to first label
- Realign control images to first control
- Coregister :
reference image = first label image
source image = first control image
other images = all other control images
basis function = mutual information
- coregister M0 to first label image
- smooth: label images, control images and M0
- CBF calculation (simple substraction)
Note that I did not change the default values of the realignement and coregistration steps
I would greatly appreciate any help !
Thanks
G Rey
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