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. Author manuscript; available in PMC: 2012 Jan 1.
Published in final edited form as: Med Image Comput Comput Assist Interv. 2011;14(Pt 3):537–545. doi: 10.1007/978-3-642-23626-6_66

Fig. 2.

Fig. 2

Nerve segment (particle) is defined as a Bézier curve centerline with four control points and a radius function r(·)