Balu,
if you want to perform statistics on images in spm, these need to be in
voxelwise alignment. If you want to perform your statistics in native
space, you will have to reslice the images at some point.
However, in your pipeline, this should already not be a problem as you
did realignment (estimate only, I assume) and then slice timing (may
want to consider doing it the other way round, by the way), so the data
are written out in the second step. If you then apply the coregistration
matrix similarly to all images (no reslicing necessary), you should not
have a problem. If you do get this error, you should double check that
the estimated coregistration matrix is actually applied to all images,
not only to the one you used to determine it.
Hope this helps,
Marko
Balu Krishnan wrote:
> Dear SPMexp,
>
> I have been using SPM for coupled EEG-fMRI for localization of interictal abnormalities. I have been using the following pipeline for preprocessing
> (1) Realign
> (2) Slice Time Correction
> (3) Coregister
> (4) Segment
> (5) Normalize
> (6) Smooth
> It works fine and we get good results. However with normalization we warp the patients MRI to MNI space which is something the physicians who reviews the results do not prefer. So I skipped the segmentation and normalization step. However now I am encountering an issue while I perform the statistical analysis. I get the following error message
>
> ** The images do not all have same orientation and/or voxel sizes. **
>
> I tried some debugging but was unsuccessful. Can anyone help me with it?
>
> Thanks,
>
> Balu
>
--
____________________________________________________
PD Dr. med. Marko Wilke
Facharzt für Kinder- und Jugendmedizin
Leiter, Experimentelle Pädiatrische Neurobildgebung
Universitäts-Kinderklinik
Abt. III (Neuropädiatrie)
Marko Wilke, MD, PhD
Pediatrician
Head, Experimental Pediatric Neuroimaging
University Children's Hospital
Dept. III (Pediatric Neurology)
Hoppe-Seyler-Str. 1
D - 72076 Tübingen, Germany
Tel. +49 7071 29-83416
Fax +49 7071 29-5473
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http://www.medizin.uni-tuebingen.de/kinder/epn/
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