Hello -
I have a series of T1w volumes with gadolinium signal present...and I'm having difficulty registering them to an atlas volume (AFNI_18.0.26, auto_warp.py, MNI_T1_2009c+tlrc). Specifically, 3dQwarp seems to interpret the vessels as 'brain,' and wraps them around cortical folds. Is there any principled way to remove the gadolinum signal, while sparing brain?
Thank you,
Pete