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. Author manuscript; available in PMC: 2021 Jun 1.
Published in final edited form as: IEEE ASME Trans Mechatron. 2020 Feb 27;25(3):1432–1443. doi: 10.1109/tmech.2020.2976897

Fig. 1:

Fig. 1:

A three-tube concentric tube robot consisting of precurved nitinol tubes nested inside of each other. Each tube can translate and rotate, and various tools can be deployed through the inner lumen. Our robotic system utilizes this same concept with two precurved nitinol tubes for each concentric tube robot and two robots deployed side by side through the endoscope.