I got a problem with mri_nu_correct in recon-all process. After mri_nu_corret step, nu.mgz looks oversmoothed. Could you please let me know why this is happening and how can I get rid of this?

This is happening with few images only. I attached original (001.mgz), nu corrected (nu.mgz) images and mri_nu_correct.mni.log file for your reference.

Thanks in advance!

Reddy.