. Author manuscript; available in PMC: 2018 Dec 1.
Published in final edited form as: IEEE Trans Med Imaging. 2017 Oct 5;36(12):2466–2478. doi: 10.1109/TMI.2017.2759819
Personal use of this material is permitted. However, permission to use this material for any other purposes must be obtained from the IEEE by sending a request to pubs-permissions@ieee.org.