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Hi FSL group, I have ROIs in 2mm MNI standard space and I want to convert them TO 1mm MNI space. I used this command: flirt -in lACC.nii.gz -ref /usr/share/data/fsl-mni152-templates/MNI152_T1_1mm_brain -applyxfm -out lACC_1mm However, when I typed in fslinfo for both the original and new ROI, I saw that the dimensions were changed. Is this ok or should the dimensions be the same? Below is the information: >>fslinfo lACC-new.nii.gz data_type INT16 dim1 91 dim2 109 dim3 91 dim4 1 datatype 4 pixdim1 2.0000000000 pixdim2 2.0000000000 pixdim3 2.0000000000 pixdim4 0.0000000000 cal_max 4.0000 cal_min 0.0000 file_type NIFTI-1+ >>fslinfo lACC_1mm.nii.gz data_type FLOAT32 dim1 182 dim2 218 dim3 182 dim4 1 datatype 16 pixdim1 1.0000000000 pixdim2 1.0000000000 pixdim3 1.0000000000 pixdim4 0.0000000000 cal_max 0.0000 cal_min 0.0000 file_type NIFTI-1+ Best, Dana