I tried to estimate response functions using the latest version of dwi2response, but get the following errors:
dwi2response tournier -voxels voxels.mif -shell 2 -lmax 8 -fslgrad dwi.bvec dwi.bval dwi.nii response-tournier.txt ... dwi2response: [ERROR] Command failed: fixel2voxel iter0_peaks.msf split_value iter0_amps.mif dwi2response: Output of failed command: fixel2voxel: [ERROR] fixel image is empty
When I run
dwi2fod csd dwi.mif init_RF.txt iter0_FOD.mif -mask mask.mif -lmax 4
in the tmp directory to reconstruct the FOD file and inspect it with mrstats, I find that it is empty (i.e., it contains 0 values everywhere). The input data looks sensible in fslview and I was able to do CSD on it using my own in-house software. Any ideas on this are appreciated.
By the way, when I try to run the “tax” algorithm, it fails with another message:
dwi2response: [ERROR] Command failed: dwiextract dwi.mif shell.mif dwi2response: Output of failed command: dwiextract: [ERROR] No dwi volumes present
Thank you and have a nice weekend