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The MGH/MGZ Volume Format
WORK IN PROGRESS
The .mgh file format is used to store high-resolution structural data and other data which are to be overlaid on the high-resolution structural volume. A .mgz file is a .mgh file that has been compressed with ZLib.
The MGH format is proprietary, defined by the NMR Center (at Massachusetts General Hospital). Short of having a formal specification of this format, the next best thing is a snapshot of the C code showing how a .mgh or .mgz file is read and written:
attachment:mri.h - .mgh file merely stores contents of MRI data structure, defined in mri.h
- attachment:matrix.h - MRI data structure contains MATRIX
attachment:mriio.c - see 'mghRead' and 'mghWrite' routines, the MGH file format is implicitly defined by these routines
- attachment:mri.c - contains helper routines used in mriio.c
- attachment:mri_info.c - source for mri_info utility; see 'do_file' routine
- attachment:mri_convert.c - source for mri_convert utility; many examples of reading and writing .mgh and .mgz files