I have just discovered a small bug in the NIFTI reader in FreeSurfer.
The bug caused the sform/qfrom matrix to be slightly off for oblique
volumes that are non-isotropic (the more oblique and the more
non-isotropic, the worse). Part of the error involves the matrix being
slightly non-orthogonal.
There is NO effect of this bug if any of the following apply:
1. You use mri_convert to convert from DICOM (or any other non-NIFTI
format) to NIFTI
2. Your volumes are not oblique
3. Your volumes are isotropic
This bug can manifest itself only when using NIFTI as input to a
freesurfer tool.
I have fixed this bug in both our DEV and STABLE versions.
doug
--
Douglas N. Greve, Ph.D.
MGH-NMR Center
[EMAIL PROTECTED]
Phone Number: 617-724-2358
Fax: 617-726-7422
In order to help us help you, please follow the steps in:
surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
_______________________________________________
Freesurfer mailing list
Freesurfer@nmr.mgh.harvard.edu
https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
