[FieldTrip] source localization difficulties

[Kanal Eliezer]

Hello folks -

I'm trying to use source localization on a number of datasets, and I'm finding the FT functions confusing.

Firstly, and most problematic, examining the same MRI data using `ft_read_mri` + `ft_volumerealign` and the tkmedit tool that comes with FreeSurfer seems to show two completely different brains. I'm unable to locate landmarks in the FT browser that I can see in the tkmedit window, and vice versa. The data isn't simply flipped; it looks that each slice is different. Why would this be the case?

Secondly, in an attempt to coregister the MRI and MEG data, I used `ft_determine_coordsys`, which simply opened a window with a picture of three axes (see attached image "ft_determine_coordsys.png"). Shouldn't there be image data overlaid on the axes?

Lastly, I've already segmented and coregistered the MRI and MEG data using FreeSurfer. Is there a way to simply load this data into FieldTrip and get right to plotting the data?

Thanks!

Elli Kanal


--------------------
Eliezer Kanal, Ph.D.
Postdoctoral Fellow
Center for the Neural Basis of Cognition
Carnegie Mellon University
4400 Fifth Ave, Suite 110A
Pittsburgh PA 15213
P: 412-268-4115
F: 412-268-5060