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. Author manuscript; available in PMC: 2009 Oct 1.
Published in final edited form as: Med Image Anal. 2008 Jun 20;12(5):616–625. doi: 10.1016/j.media.2008.06.008

Fig. 1.

Fig. 1

Importance of the topology of groups: the individual structures in above images have the same topology, but the relationships between them are different, corresponding to changes in the topology of groups (unions) of structures.