[Mne_analysis] Coregistration

[Alexandre Gramfort]

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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