Dear Lucy,
Try DISPLAY: they may have funny origins or offsets and SPM then "sees" them in some corner of the matrix. You can then reorient them with the functions below the graphics window - best move them around until the crosshair shows up roughly in the position of the anterior commissure.
This will likely solve the issue. If not, do get back to the list as there are some more exotic possible errors.
All the best,
Alexander
-----------------------------
Alexander Hammers, MD PhD
Chair in Functional Neuroimaging
Neurodis Foundation
http://www.fondation-neurodis.org/
Postal Address:
CERMEP – Imagerie du Vivant
Hôpital Neurologique Pierre Wertheimer
59 Boulevard Pinel, 69003 Lyon, France
Telephone +33-(0)4-72 68 86 34
Fax +33-(0)4-72 68 86 10
Email [log in to unmask];[log in to unmask]
---------------------------------
Other affiliations:
Visiting Reader; Honorary Consultant Neurologist
Division of Neuroscience and Mental Health, Faculty of Medicine
Imperial College London, UK
---------------------------------
Honorary Reader in Neurology; Honorary Consultant Neurologist
Department of Clinical and Experimental Epilepsy
National Hospital for Neurology and Neurosurgery/ Institute of Neurology, University College London, UK
On 4 Feb 2011, at 02:32, Lucy Elizabeth Vivash wrote:
> Hi,
>
> I am having trouble normalising a couple of FDG-PETs. The majority of
> images (matrix size 128 x 128 x 56) have normalised fine. However there
> are a couple of images with differing matrix sizes (128 x 128 x 35, 256 x
> 256 x 224) which do not normalise (error message: "not enough overlap"). I
> have tried manually altering the matrix size to 128 x 128 x 56 to no
> avail.
>
> Any suggestions?
>
> Regards,
> Lucy
>
>
>
> Lucy Vivash MSci (Hons)
> PhD Student
> Department of Medicine
> Royal Melbourne Hospital
> 3050
> Victoria
> Australia
> Ph: (03) 8344 0531
> Email: [log in to unmask]
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