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. Author manuscript; available in PMC: 2015 Mar 25.
Published in final edited form as: Med Image Comput Comput Assist Interv. 2014;17(0 1):739–746. doi: 10.1007/978-3-319-10404-1_92

Fig. 2.

Fig. 2

(a) The 2D overview of the division of columns into the three sets: the hole boundary, the hole itself and the region outside the hole. (b) An example of the 2D segmentation of the NCO boundary that is used to define set B.