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. 2012 Jul 18;7(7):e41037. doi: 10.1371/journal.pone.0041037

Figure 1. Volume of interest (VOI) selection method.

Figure 1

The articular surface of the humeral and femoral heads (shown in red) were extracted from a three-dimensional isosurface reconstruction. The volume of interest was scaled based on the size of a best-fit cube for the articular surface and was positioned in the center of the humeral or femoral head.