Operating system and version

CentOS 7

CPU architecture

x86_64 (PC, Intel Mac, other Intel/AMD)

ANTs code version

ants-2.5.0

ANTs installation type

Compiled from source

Summary of the problem

When I use antsMotionCorr with the --write-displacements options I see no displacement output.

The input 4D NiFTI is a PET series.

Commands to reproduce the problem.

antsMotionCorr --write-displacement -m CC -d 3 -o ".nii.gz" -p Linear -t Rigid -o ave.nii.gz -a PET_4frames.nii.gz

Output of the command with verbose output.

ANTSVERSION=ants-2.5.0

ls
ave.nii.gz

Data to reproduce the problem

BRAIN_AC_ADNIrecon_2024.02.21.nii.gz