hey,
I have used cASL mostly but i have a question for you, why do you want
to co-register?
don't you need to align, average (labeled and control) then subtract to
get the CBF image ?
P
On Wed, 2010-06-30 at 07:19 -0700, Gwladys Rey wrote:
> 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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