[Mne_analysis] Alignment Problems

[Thomas Wallis]

Hello,

I am having trouble aligning MEG position and the MRI. I have  
attempted to attach some pictures to illustrate.

I can get the data to the mne_analyze stage. When I check the viewer,  
the head is shown protruding through the MEG helmet. Consequently, the  
source estimates are problematic.

As can be seen in the original alignment pictures  
(Alignment_Original_1 and _2), the digitizer data and head position  
information is shown far above the scalp and rotated forwards. I  
manually re-aligned the digitizer data in the mne_analyze viewer (see  
Realigned_1 and _2). I then saved the alignment as a COR-.fif file,  
and re-calculated the forward models and the inverse operator.

When I load the data back into mne_analyze, the digitizer data looks  
as I aligned it, but the scalp is still protruding from the MEG helmet  
(see Realigned_Failure_1 and _2).

Where have I gone wrong? Any help would be greatly appreciated.

Regards,

Tom Wallis


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