Saving Volume Image Data
When saving an image either as a direct copy of an original dataset or
a transformed version of a dataset, rview prompts for a file name:

Currently rview can save an image volume in one of two file formats:
Mayo Analyze format or UMDS GIPL (Guys image processing lab) format.
The type is basically determined by the extension of the file name (.hdr) forces analyze format to be
used, while .gipl forces GIPL format to be used). Please note: both
formats are saved in
little endian (SUN) byte order to remain compatible with the original
sun version of analyze. Both image formats store the data using 16 bit
signed format for voxel values.
Analyze format is saved with a header file and a data file (you supply
only the header file name and the voxel data is saved in a
corresponding '.img' file) for example entering 'fred.hdr' creates two
files:
fred.hdr
fred.img
The newest version of rview (>8.140) can save analyze format in
8-bit also: this is selected by simply including the term '8bit' at the
end of the main part of the file name (before the extension) for
example:
fred_8bit.hdr.
.