It's a bit hard to check the coregistration without being able to
click around on various bits of the brain and occasionally zooming in,
but it seems to be roughly OK.
I'd suggest taking a look to see if the spatially normalised
anatomical scans are OK. If this is the case, and the coregistration
is fine, then I'm not sure what could have caused the problem. If the
spatial normalisation has not worked so well, then it may be worth
looking at the segmented anatomical for clues.
Best regards,
-John
On 9 December 2010 15:57, Michael Froelich <[log in to unmask]> wrote:
> Dear SPmers,
>
> I ran into a normalization issue with one participant in particular. This is illustrated in the attached pdf "book", where I am showing the registration of the subject's anatomical to the subject's EPI, then the registration of the SPM EPI template (top) to the subject's realigned, normalized and smoothed image and finally the registration of the SPM EPI template to the subject's realigned, normalized and smoothed image after stretching it by a factor of 1.1 in both the y and z direction. I am showing three views of each sets.
> The final result looks ok but I am worried about this ~10% error with the "unified segmentation approach.
>
> What I did, in terms of Analysis is:
> 1. Reorient anatomical and functional images separately to the AC
> Then, use the preprocessing steps (batch) as outlined in the SPM8 manual (expect I didn't write the realigned images and didn't do slice time correction)
> Realign:estimate, Coreg:Estimate, Segment, Normalize:Write, Smooth.
>
> Michael
> University of Alabama
>
>
>
>
>
>
>
|