Hello - We are preprocessing a bunch of images from the UKBioBank dataset through fmriprep. I have a subset of subjects processed through 20.2.0 and 21.0.2 - my issue below is applicable to both versions.
In looking at the space-MNI152NLin2009cAsym_desc-preproc_bold.nii.gz
images, there are different dimensions between subjects. However, within subject but between version the dimensions are the same. For example:
sub-01 old: (82, 97, 79, 490)
sub-01 new: (82, 97, 79, 490)
sub-02 old: (82, 97, 81, 490)
sub-02 new: (82, 97, 81, 490)
sub-03 old: (82, 97, 83, 490)
sub-03 new: (82, 97, 83, 490)
sub-04 old: (81, 97, 82, 490)
sub-04 new: (81, 97, 82, 490)
Where āoldā and ānewā just refer to the different fmriprep versions. However, when I look at task-rest_space-MNI152NLin6Asym_desc-smoothAROMAnonaggr_bold.nii.gz
they are all the same dimensions (91, 101, 91, 490).
The raw images are all the same dimensions (88, 88, 64, 490).
I have some subjects from the ABIDE dataset also processed with both fmriprep versions and this discrepancy is not there, even though all subjects were processed using the same fmriprep command:
singularity run --cleanenv \
-B ${TEMPLATEFLOW_HOST_HOME}:${SINGULARITYENV_TEMPLATEFLOW_HOME} \
-B ${TMPDIR}/in:/in \
-B ${TMPDIR}/out:/out \
-B ${TMPDIR}/wrk:/wrk \
${container} /in /out/${s} participant \
--participant_label ${s} \
-w /wrk/${s} \
--nthreads 10 \
--mem_mb 48000 \
--fs-license-file ${license} \
--output-spaces fsaverage6 fsLR MNI152NLin2009cAsym \
--cifti-output \
--skip-bids-validation \
--notrack \
--use-aroma \
--error-on-aroma-warnings
What would cause this dimension discrepancy?
Thanks in advance.