fMRIPrep output dimension

Hi everyone,

I wonder why fMRIprep produces the last image (“sub-3006_task-rest_run-1_space-MNI152NLin2009cAsym_desc-preproc_bold.nii.gz”) in the below dimensions:
Dimension : 78 x 93 x 78 x 257
Pixel Dimension : 2.5 x 2.5 x 2.5 x 1.5
where “tpl-MNI152NLin2009cAsym_res-02_desc-brain_T1w.nii.gz” has these ones:
Dimension : 97 x 115 x 97
Pixel Dimension : 2 x 2 x 2

I extracted this information by oro.nifti R package. I want to convert Brainnetome atlas to this template to employ new atlas for connectivity analysis.
Do you know why this issue happens and any solution for that?

Many thanks,


Without specifying a particular resolution in your output space, the voxel dimensions will match your the input image. Did you specify res-2 in your fmriprep command?


1 Like

Thanks, @Steven. You are right!