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. Author manuscript; available in PMC: 2008 Sep 29.
Published in final edited form as: J Vasc Interv Radiol. 2007 Sep;18(9):1141–1150. doi: 10.1016/j.jvir.2007.06.014

Figure 3.

Figure 3

(a) S4-1 US transducer with a 6-df electromagnetic position sensor attached. (b) Tracked stylet-sheath combination. (c) Tracked three-hole needle guide.