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Bug 415 - ft_checkcoordsys

Reported 2011-01-19 11:58:00 +0100
Modified 2011-01-26 15:32:07 +0100
Product: FieldTrip
Component: forward
Version: unspecified
Hardware: PC
Operating System: Windows
Importance: P1 normal
Assigned to: Jan-Mathijs Schoffelen
Depends on:
See also:

Lilla Magyari - 2011-01-19 11:58:06 +0100

Hi J-M, In the anatomical processing pipeline, ft_checkcoordsys should make the transformation of the cortical sheet (source space) from one coordinate system (FS, MNE Suite) to the other (FT, subject's headspace). Lilla

Jan-Mathijs Schoffelen - 2011-01-21 16:38:24 +0100

Hmm, this was indeed the original plan. Yet, the transformation needs some amount of user interaction, and therefore I think ft_volumerealign is the place to implement this. For now it supports (implicitly) conversion between CTF-based and Talairach-based coordinate systems. It looks as if Freesurfer manages Talairach-based coordinate systems quite well, without the need of explicitly using the Freesurfer coordinate system conventions (are handled within Freesurfer). At the moment ft_volumerealign also outputs a transformorig (which is the original coregistration matrix). The transformation from the old-coordsys to the new-coordsys can be achieved by: T = mri.transform*inv(mri.transformorig); Also, see: