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. Author manuscript; available in PMC: 2015 Sep 22.
Published in final edited form as: IEEE ASME Trans Mechatron. 2010 Oct 21;15(6):906–915. doi: 10.1109/TMECH.2010.2080360

Fig. 2.

Fig. 2

Prototype design with modified inner stylet incorporated with three optical fibers. Three identical grooves at 120° intervals are made on the inner stylet to embed optical fibers with FBGs along the needle length. (a) Midpoint cross section. (b) Magnified view of an actual groove. (c) Tip of the stylet. (d) Fixture design for EDM parallel grooves in the biopsy needle stylet.