Dear Freesurfer-Expert,
We are currently trying to develop a 3D-Model from MRI data using combined files from Freesurfer and FSL. For this purpose we run recon-all on our subject and furthermore get some ROIs from FSL-based scripts. When visualizing the Freesurfer surfaces together with the FSL ROIs in any 3D modelling software (like e.g. Meshlab or 3D Slicer), there seems to be a space mismatch meaning: the FSL-based ROIs lie more inferior relative to the Freesurfer surfaces than they should (a shift in any other direction might be there but is at least not visible by eye; see attached screenshot). If we further add a single 2D slice of the original T1.mgz file to the 3D model, it seems to be consistent with the spatial position of the FSL ROIs, while the Freesurfer surfaces are clearly shifted (at least in z-direction; see attached screenshot). However opening the surfaces and the T1.mgz in freeview instead of 3D-Slicer, the spatial position fits.
Do you have any idea of why this is the case or even more important, how to bring both structures in the same "space"? As we need to continue modelling in 3D-Slicer, we are looking for a way to correct the spatial shift independent of freeview. We are very thankful for any input on this matter!
Best regards, Bastian David
Bastian David, M.Sc. Ph.D. candidate .............................................................. Department of Epileptology University of Bonn .............................................................. Sigmund-Freud-Str. 25 53127 Bonn .............................................................. bastian.david@ukb.uni-bonn.de www.epileptologie-bonn.de
