Hello Gabriel,
the way not to generate huge files is to do "coregister - estimate
only". The reason you end up with such a huge file is that every
functional volume is resliced to the dimension of the anatomical, which,
as you found out, is not a good idea :)
One has to admit that the terminology is slightly counter-intuitive as
"estimate only" will still change the orientation of the image, and not
only estimate it, but it will not reslice the image. SPM will read the
updated orientation just fine, though, and this approach has the added
benefit of not touching the raw data (i.e., no interpolation needed) as
the rigid-body transformation applied by coregistration can be stored in
the header.
Hope this helps,
Marko
gabriel robert wrote:
> Dear SPM list,
>
> Apologize for the basic question :
>
> I am trying to coregister a 4D.nii file to its related structural scan.
>
> By using the "Coreg - estimate and reslice option", the ref image is the
> structiral scan and the source image is the first (aligned) frame while
> the Other images are the remaining 443 frames.
>
> The reslice option generates a 5 GB ra image (for 1 subjectg).
>
> Is there a way not to generate such an enormous file ?
>
> Many thanks for your replies,
>
> Gabriel
--
____________________________________________________
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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