We’re running fMRIPrep v1.4.1 on multiband, multiecho data and are running into poor registration issues between the functionals and anatomical for several subjects. We’re trying to troubleshoot this (test case is a subject with enlarged ventricles) and have a couple of questions:
Which image is used for registration to the T1? Is it a temporary image?
Is it possible to register the images manually, and then continue with the pipeline?
It depends on how you called fMRIPrep. With the t2s_coreg flag, the calculated T2* map is used for coregistration. Otherwise, the appropriate “bold_ref_brain” is supplied here based on your exact call:
I think that would be a complicated bit of workflow surgery, although it’s not technically impossible. I’m not the best person to advise on exactly how to achieve that, though.
I wanted to follow up with a few questions:
Could you share your exact call of fMRIPrep ? What kinds of images are you supplying (i.e., do they have accompanying SBRefs) ?
We actually tried running without the t2s_coreg flag and that seems to help.
Originally the original call was:
singularity exec --cleanenv
/beegfs/work/public/singularity/fmriprep-1.4.1.sif fmriprep ${BIDS_Dir} ${Out_Dir} participant
–fs-license-file /beegfs/work/hartley/projects/MotER/scripts/fsLicense/license.txt
–ignore slicetiming
–output-spaces “MNI152NLin2009cAsym” “T1w”
–participant_label ${SUBJ_ID}
–t2s-coreg
We are supplying the accompanying SBRef images for each echo. I have shared an example report with your gmail - please let me know if there’s anyone else that would be helpful to share this with.