[Mne_analysis] Coregistration

[Denis-Alexander Engemann]

Just thinking about canonical coordinates and coregistration.
If you only have the standard EEG positions without e.g. exct polhemus
coordinates, and you don't have individual MRs.
One single coregistration should actually work for one type of sensor net,
right?

-- Denis

2014-10-30 9:21 GMT+01:00 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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