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BRIK/HEAD - Just Solve the File Format Problem

BRIK/HEAD

From Just Solve the File Format Problem
Revision as of 14:13, 5 April 2013 by Dan Tobias (Talk | contribs)

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File Format
Name BRIK/HEAD
Ontology
Extension(s) .brik,.head

General description

BRIK and HEAD files are medical imaging (generally, brain imaging) data files generated and used by the AFNI (Analysis of Functional NeuroImaging) analysis package. The files are multi-dimensional raster data, or "voxel" data -- in essence, pixels with a value in three dimensions. The AFNI format also supports time-series data, or multiple values at each voxel over time, per participant, or with different meaning (for example, a beta value and a t-statistic).

The .BRIK portion of the file contains the actual voxel data, while the .HEAD file contains the metadata needed to interpret the data.

Software

The AFNI software suite is open-source, written in C, and available here.

Other considerations

Note that (nearly?) all AFNI programs support the much more widely-used .nii file format; converting data to that format may be a good move. A caveat is that the .nii header supports much less information than .head files.

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