NIfTI image data format
NIfTI is a variant of FormatAnalyze that incorporates some of the features of FormatSpmAnalyze.
It is designed to contain enough information to supercede previous variants of the abused old FormatAnalyze. In particular it contains fields that allow the storage of transformation matrices to encode results of realignment, coregistration and normalization.
It is the default data format of the latest versions StatisticalParametricMapping. FmribSoftwareLibrary and AFNI.
The current version (July 2006) is NIfTI-1. There is a new version in development, NIfTI-2.
See http://nifti.nimh.nih.gov/nifti-1 for documentation.
There is also a NIfTI FAQ - http://nifti.nimh.nih.gov/nifti-1/documentation/faq