Some subjects have different image and label dimensions and resolution

[valosekj]

Some subjects have different image and label dimensions and resolution.

For example, for subject sub-beijingGE02, T2w image has different dim and pixdim than T2w spinal cord segmentation:

$ sct_image -i sub-beijingGE02/anat/sub-beijingGE02_T2w.nii.gz -header | grep dim | head -2
dim		[3, 56, 256, 256, 1, 1, 1, 1]
pixdim		[1.0, 0.8, 1.0, 1.0, 0.0, 0.0, 0.0, 0.0]

$ sct_image -i derivatives/labels/sub-beijingGE02/anat/sub-beijingGE02_T2w_seg-manual.nii.gz -header | grep dim | head -2
dim		[3, 56, 320, 320, 1, 1, 1, 1]
pixdim		[-1.0, 0.799994, 0.8, 0.8, 1.0, 1.0, 1.0, 1.0]

This discrepancy probably originates from processing, where T2w image was resampled and then segmented:

# T2
# ------------------------------------------------------------------------------
file_t2="${SUBJECT}_T2w"
# Reorient to RPI and resample to 0.8mm iso (supposed to be the effective resolution)
sct_image -i ${file_t2}.nii.gz -setorient RPI -o ${file_t2}_RPI.nii.gz
sct_resample -i ${file_t2}_RPI.nii.gz -mm 0.8x0.8x0.8 -o ${file_t2}_RPI_r.nii.gz
file_t2="${file_t2}_RPI_r"
# Segment spinal cord (only if it does not exist)
segment_if_does_not_exist $file_t2 "t2"

In other words, data-multi-subject contains the original non-resampled T2w image but SC seg obtained from resampled T2w image. So far, I noticed this for sub-beijingGE and sub-brnoUhb subjects.