= Eigen file (.eig) to NIfTI converter = {{{eig2nifti}}} converts {{{.eig.nii.gz}}} files saved by [[BrainSuite|BrainSuite Diffusion Pipeline (BDP)]] to standard NIfTI-1 format. It takes {{{.eig.nii.gz}}} file as input and writes out corresponding eigenvector and eigenvalue files in standard NIfTI-1 format. '''Syntax''' {{{ eig2nifti(input_eig_file, output_base) }}} where, {{{input_eig_file}}} is a character array of input filename ({{{.eig.nii.gz}}}) and {{{output_base}}} is character array of file-prefix for output filenames. Following example shows {{{eig2nifti}}} in action and explains the output files: {{{ >> eig2nifti('2467264c.dwi.RAS.correct.eig.nii.gz', '2467264c.tensor') Reading eig file...Done Saving files... Saved V1 file: 2467264c.tensor.V1.nii.gz Saved V2 file: 2467264c.tensor.V2.nii.gz Saved V3 file: 2467264c.tensor.V3.nii.gz Saved L1 file: 2467264c.tensor.L1.nii.gz Saved L2 file: 2467264c.tensor.L2.nii.gz Saved L3 file: 2467264c.tensor.L3.nii.gz }}} where {{{L1 file}}} contains the largest eigenvalues with corresponding eigenvector saved in {{{V1 file}}}. Similarly, {{{L2 file}}} contains the second largest eigenvalues with corresponding eigenvector saved in {{{V2 file}}} followed by {{{L3 file}}} and {{{V3 file}}}. All eigenvalue files ({{{L1,L2,L3}}}) are 3D volume while eigenvector files ({{{V1,V2,V3}}}) are 4D volume with last dimension containing the eigenvectors. {{{eig2nifti}}} depends on several other functions which are included along with the download zip. All files should be added to the MATLAB path. See included {{{sample_eig2nifti.m}}} for another example of running {{{eig2nifti}}}. === Download Links === * [[http://neuroimage.usc.edu/resources/eig2nifti.zip|eig2nifti.zip]] Last Modified: Oct 9, 2013 '''Authors:''' [[Members|Chitresh Bhushan]] <>