Update niworkflows/interfaces/images.py
Update niworkflows/interfaces/images.py

Co-Authored-By: Chris Markiewicz <985f67effdb40e64a0270743b2fa0fb4d285bc9c@gmail.com>
oesteban/niworkflows,oesteban/niworkflows,poldracklab/niworkflows,oesteban/niworkflows,poldracklab/niworkflows