Default template used for spatial normalization

Dear experts,

Hi. I’m using fMRIprep to preprocess developmental data in the HBN dataset. I haven’t run into much trouble, but have a question.

I used the --output-spaces MNIPediatricAsym:cohort-1:res-2 --skull-strip-template MNIPediatricAsym:cohort-1 option for my fmriprep-docker command to set the template, but it seems like fmriprep is also using the default template - which is the MNI152NLin2009cAsym template - additionally to do normalization. I want to shorten the process, thus want to skip using the latter template. Is there any way to do that? Or is fmriprep using this template because it needs the data in later processes?

This is the full command I used below.

fmriprep-docker my/input/directory my/output/directory participant --participant-label NDARAC462DZH --skull-strip-template MNIPediatricAsym:cohort-1 --output-spaces MNIPediatricAsym:cohort-1:res-2 --skip_bids_validation --fs-license-file Desktop/license.txt --nthreads 12 --work-dir my/working/directory

Thank you in advance!