Dear Laura,
I guess that what you specified is that the centre of the sphere will
move to the nearest local maxima of the SPM{.} without any constraint,
ie it can go very far away from the coordinates you entered.
If you want to restrict the centre of the sphere to move to the nearest
peak within a given sphere (with its own radius), you should do
something like this:
https://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=spm;eabace9e.1502
Best regards,
Guillaume.
On 31/03/15 11:47, Laura Lisa wrote:
> Hi,
>
> I used batch mode to extract subject-specific VOIs within a sphere of 10
> mm for PPI. I specified that the peak as "individual" within this
> sphere. (Sphere [0 0 0], Radius 10, Nearest local maxima. I wondered
> what exactly this means. Does this mean that the peak lies within the 10
> mm sphere? And how big is the indificual sphere where I extract the
> eigenvariate from?
>
>
> Thanks a lot!
>
> Laura
--
Guillaume Flandin, PhD
Wellcome Trust Centre for Neuroimaging
University College London
12 Queen Square
London WC1N 3BG
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