[FieldTrip] fixed dipole orientation for MNE

[Eelke Spaak]

Dear Yuval,

The LCMV and DICS beamforming implementations in FieldTrip support
cfg.<method>.fixedori = 'yes', where <method> is either 'lcmv' or
'dics'. This will compute a filter which constrains each dipole to
point in the strongest orientation. For SAM I think this is not
implemented, and for MNE I have no clue.

Does this answer your question? Or are you lookling for another type
of fixed orientation, maybe based on anatomy or so?

Best,
Eelke

On 18 June 2013 14:58, Yuval Harpaz <yuvharpaz at gmail.com> wrote:
> Dear group
> I would like to ask again
> (http://mailman.science.ru.nl/pipermail/fieldtrip/2011-February/003456.html)
> about head model with fixed dipole orientation (obtained from freesurfer),
> as I saw no reply to the previous message.
>
> I understand that there is no civilized way, currently, to tell MNE or
> beamforming to use fixed orientation, or am I wrong?
>
> applying 'sam' I managed to set dipole orinetation by making a dip.mom field
> in addition to dip.pos and by
> gain = lf;
> instead of the existing
> gain = lf * UnitMDip';
> note that here lf is a vector (no 3 columns).
>
> However this is patchy and not thorough. So can you please tell me if there
> is a way to do it with regular ft functions?
> thank you
> Yuval
>
>
>
>
> Dr .Harpaz
>
> BIU MEG lab
>
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