It is not really an issue, I am just curious. So after the use of fixel2voxel:
###FD
#convert fixel values to voxel
fixel2voxel tempdir/fd_smooth/{participant}.mif sum tempdir/FD_sum_voxel_smoothed/{participant}_FD_sum_smooth.mif -force
###FC
fixel2voxel -weighted tempdir/fd_smooth/{participant}.mif tempdir/log_fc_smooth/{participant}.mif mean tempdir/FC_weighted_mean_voxel_smoothed/{participant}_FC_weighted_mean_smooth.mif -force
###FDC
fixel2voxel tempdir/fdc_smooth/{participant}.mif sum tempdir/FDC_sum_voxel_smoothed/{participant}_FDC_sum_smooth.mif -force
I get outputs that have the scalar maps and a second empty volume with values of 0.0 everywhere.
What could be the cause and is it potentially a problem?
Thank you,
Paul