Dear Gemma
Please note, that there are some differences in the way that SVC is performed in SPM and the Anatomy toolbox.
In SPM, the statistical image is first thresholded at the selected level. You then supply the SVC mask and get a new stats-table indicating which of the supro-threshold voxels (based on the previous threshold) are
significant at the SVC level. Voxels not passing the initial threshold are not considered, the display is not updated.
In the Anatomy toolbox, the statistical image is re-loaded when you perform the SVC, masked by the selected region of interest and thresholded such that only the SVC-corrected voxels are displayed.
Hope this helps
Simon
Hi,
I am currently doing an analysis where I'm limiting my ROIs to specified sensory areas. When looking at the stats I use a pre-made mask in SPM to do a small volume correction. However, when I put it into anatomy toolbox, using the same statistical procedure
and then use the anatomy toolbox SVC with the same ROI mask, i'm getting different cluster sizes and different areas showing to that in my original stats. Is there a bug in the SVC through anatomy toolbox? Or is there something I am doing wrong? Is there an
alternative way to do a small volume correction with anatomy toolbox to keep consistent?
Thanks,
Gemma
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Gemma Lamp
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