Hi,
I have a mask (mask_1mm) with voxel size of 1x1x1mm. I want to use it to mask a 2x2x2mm map so I use below command to change it into 2x2x2 (mask_2mm):
flirt -in mask_1mm -ref /usr/local/fsl/data/standard/MNI152_T1_2mm_brain -applyisoxfm 2 -out mask_2mm
Then I check the voxel number/volume of the 2 masks:
mask_1mm.nii.gz
1226669 / 1226669
mask_2mm.nii.gz
181444 / 1451552
I found the voxel size in mask_2mm is not 1/8 that in mask_1mm, and the volume of the two masks are different.
Is it normal?
Thanks.
Mark
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