Natalia,
my first suggestion would be that you may want to check the mask.img
image in the directory containing the SPM.mat file. It looks like it may
be too conservative, which could be changed by supplying an implicit
mask or changing the default masking threshold. However, maybe this is a
meaningful "omission" if you have subjects that moved too much (if data
is not available for all subjects, all timepoints, then these voxels
will not be estimated).
Cheers,
Marko
Natalia Yakunina wrote:
> Dear experts,
>
> I have been using SPM12 for the first time in the current analysis.
> After performing group GLM, it seems that the final activation map
> extent is smaller than the structural image, i.e. the statistical image
> does not reach the brain edges (as if masked) (FIG1). Original EPI
> images seems fine (FIG2-3). I also attached figures of the anterior DMN
> obtained through ICA on SPM12 preprocessed images (FIG4), and SPM8
> preprocessed images (FIG5). SPM12 DMN appears to have the same problem.
> I would appreciate any comment on this matter.
>
> Thank you.
>
> Sincerely,
> Natalia
--
____________________________________________________
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
[log in to unmask]
http://www.medizin.uni-tuebingen.de/kinder/epn/
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