BIRN License Yes NITRC Gradient Non-linearity Unwarping Tool Linux Yes Python, C The Brain Morphometry testbed of the BIRN provides a tool to correct gradient non-linearity distortions in MR structural images. This correction improves test-retest reproducibility crucial for multi-site studies. 2009-7-01 Beta 2.01 2009-2-26 Beta 2.0 2007-12-31 Beta V1.0 Gradient Non-linearity Unwarping Tool Console (Text Based), English, Beta, Python, End Users, Linux, C, Artifact Removal, DICOM, NIfTI-1, MR, BIRN License http://www.nitrc.org/projects/grad_unwarp/, http://nbirn.net/tools/gradient_non_linearity/index.shtm