[Mne_analysis] Coregistration

[Liu Mengting]

Thanks, but then I have another question, after I co-registered using
mne.gui.coregistration, I need a 3-layer BEM for EEG forward modeling,
Usually I use mne_watershed_bem to create one with the infomation in
template brain, but I cannot find the any MRI files in the brain/subject
folder I scaled, thus I am not able to make a BEM using the brain I
coregistered, can you let me know how to use the co-registered brain to
make 3-layer BEM please?

Thanks,

Mengting

2014-10-30 4:21 GMT-04:00 Alexandre Gramfort <
alexandre.gramfort at telecom-paristech.fr>:

> hi,
>
> > I have a basic question about coregistration in EEG forward modeling
> using
> > fsaverage brain, when I tried to align the EEG channels and fMRI by
> > mne.gui.coregistration, it seems to scale the head shape to fit the
> > electrode;
>
> this is correct.
>
> > but when I made the alignment using mne_analyze, it seems to move
> > and scale the electrodes to fit the head shape. So are these two way the
> > same?
>
> mne_analyze does not support template brains. So it does not
> scale anything but just find the best translation+rotation to fit the
> scalp surface
> to the electrode positions.
>
> Alex
>
> > Also, when I set fiducials in mne_analyze, the coordinates of
> > LAP/NASION/RAP will always have a 400 mm (which was definitly wrong)when
> I
> > clicked on where I want to set the fiducials on the head surface, and I
> also
> > am not able to type in the coordinates by hand, does it sound correct?
> >
> > thanks,
> >
> > Mengting
> >
> >
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