SPM8 attempts to follow the recommendations of the Data Format Working Group
(DFWG: http://nifti.nimh.nih.gov/dfwg/ ) that aims at proposing solutions to the problem
of multiple data formats used in fMRI research.

• NIfTI-1 is the image file format used in SPM8.
  • See http://nifti.nimh.nih.gov/
• GIfTI-1 is the geometry file format used to store a variety of surface-based data.
  • See http://www.nitrc.org/projects/gifti/

Functions to read/write files with these formats are implemented in the Matlab classes
@nifti and @gifti.
 
These descriptions of the new features are taken from the SPM8 Release Notes
 
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