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. Author manuscript; available in PMC: 2010 Jun 17.
Published in final edited form as: Conf Proc IEEE Eng Med Biol Soc. 2009;2009:5909–5912. doi: 10.1109/IEMBS.2009.5334843

Fig. 1.

Fig. 1

Illustration of the voxel-based approach to represent and calculate the union of multiple spheres. For simplicity, we consider here only circles on a 2D plane, although the concept is readily applicable to the 3D spheres.