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. Author manuscript; available in PMC: 2018 Nov 1.
Published in final edited form as: J Biomed Inform. 2017 Sep 22;75:48–62. doi: 10.1016/j.jbi.2017.09.010

Figure 16.

Figure 16

Detection for multiple-loops of a thread. A double-throw is made when the tool projection, t, is inside of the first loop (in black) and second loop (in purple) at the same time.