[Mne_analysis] (no subject)

[Alexandre Gramfort]

hi Vincent,

here is a tiny python script to address your question:

https://gist.github.com/agramfort/5244414

The output is:

head 0.00721512121192
skull 0.0057216261293
brain 0.00540786011339

so the average distance between nodes is 5mm for skull and brain
surfaces and 7 for the skin
if you use the default BEM models with 5120 nodes per layer.

That explains you why you have the --mindist 5 in the sample data demo script:

https://github.com/mne-tools/mne-scripts/blob/master/sample-data/run_meg_tutorial.sh#L73

HTH,
Alex

On Mon, Mar 25, 2013 at 7:35 PM, Vincent Rupp Jr.
<vincentruppjr at gmail.com> wrote:
> Hi,
>
> According to the MNE cookbook
> (http://martinos.org/mne/manual/cookbook.html#computing-the-forward-solution),
> the --mindist option may be employed during computation of the fwd solution
> and suitable values for this option are "of the order of the size of the
> triangles on the inner skull surface."
>
> Where should I look to find out the size of these triangles in my data? I
> used "mne_watershed_bem --atlas" to create my BEM mesh. Thank you for any
> help you can offer.
>
>
> Best wishes,
>
> Vincent
>
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