If you create your ROI from the average of your spatially normalised (to
MNI space) images, then that should be a bit easier.
ROIs defined on the average templates are not in alignment with images
in MNI space.
Best regards
-John
On Tue, 2009-07-07 at 18:04 +0100, FREYA COOPER wrote:
> Dear all
>
>
>
> I have transformed my pre processed images (created using DARTEL and
> SPM5) to MNI space using the method described in the DARTEL manual and
> the adaptation written by Donald McLaren.
>
>
>
> I have created an ROI to use as a small volume correction by tracing
> the area I need of template_6: however some blobs that are inside the
> glass brain and the mask.img are showing up as ‘outside’ the
> template-almost as if it has ‘shrunk’, or is not in the same space as
> the imputed scans, and I imagine that this will have an effect on my
> ROI and small volume correction. I have read on the SPM help list that
> transforming images to MNI space can inhibit the use of an ROI
> (although I don’t quite understand why or how). I was wondering if
> anyone had any suggestions for working around this, such as, should I
> create my ROI from another image?
>
>
>
> I would really appreciate any help
>
>
>
> Best wishes
>
>
>
> Freya Cooper
>
>
>
> Postgraduate Research Student
>
> The Auditory Group
>
> Institute of Neuroscience
>
> Newcastle University
>
> NE2 4HH
>
> Tel:(0191) 222 3445
>
>
>
>
>
>
--
John Ashburner <[log in to unmask]>
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