Hi,
On Mon, Dec 7, 2015 at 4:19 PM, aynur koroglu <[log in to unmask]> wrote:
> Dear SPMers,
>
> I would like to extract the ROIs of DMN using the coordinates of one of the
> related studies (i.e. Yeo et all or Van dijk et al).
>
> My question is what determines the sphere radius?
>
> Could I increase the radius to include as much voxels as possible without
> merging into neighboring regions?
>
> Moreover, it would be great if you could help me with any alternatives.
Maybe you could have a look at other papers doing this for their approach.
You probably want the largest sphere (the average across voxels
reduces noise) that would still remain within a homogenous area (all
voxels having similar responses), but of course it's a judgement call
as to what a homogenous area might be.
Best,
Matthew
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