Micron: An Actively Stabilized Handheld Tool for Microsurgery

We describe the design and performance of a handheld actively stabilized tool to increase accuracy in microsurgery or other precision manipulation. It removes involuntary motion, such as tremor, by the actuation of the tip to counteract the effect of the undesired handle motion. The key components a...

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Veröffentlicht in:IEEE transactions on robotics 2012-02, Vol.28 (1), p.195-212
Hauptverfasser: MacLachlan, Robert A., Becker, Brian C., Tabares, Jaime Cuevas, Podnar, Gregg W., Lobes, Louis A., Riviere, Cameron N.
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container_end_page 212
container_issue 1
container_start_page 195
container_title IEEE transactions on robotics
container_volume 28
creator MacLachlan, Robert A.
Becker, Brian C.
Tabares, Jaime Cuevas
Podnar, Gregg W.
Lobes, Louis A.
Riviere, Cameron N.
description We describe the design and performance of a handheld actively stabilized tool to increase accuracy in microsurgery or other precision manipulation. It removes involuntary motion, such as tremor, by the actuation of the tip to counteract the effect of the undesired handle motion. The key components are a 3-degree-of-freedom (DOF) piezoelectric manipulator that has a 400-μm range of motion, 1-N force capability, and bandwidth over 100 Hz, and an optical position-measurement subsystem that acquires the tool pose with 4-μm resolution at 2000 samples/s. A control system using these components attenuates hand motion by at least 15 dB (a fivefold reduction). By the consideration of the effect of the frequency response of Micron on the human visual feedback loop, we have developed a filter that reduces unintentional motion, yet preserves the intuitive eye-hand coordination. We evaluated the effectiveness of Micron by measuring the accuracy of the human/machine system in three simple manipulation tasks. Handheld testing by three eye surgeons and three nonsurgeons showed a reduction in the position error of between 32% and 52%, depending on the error metric.
doi_str_mv 10.1109/TRO.2011.2169634
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subjects Acceleration
Accuracy
Applied sciences
Biological and medical sciences
Compensation
Computer science
control theory
systems
Control theory. Systems
Exact sciences and technology
Force
Humans
Manipulation
Manipulators
medical robotics
Medical sciences
Microsurgery
Motion control
optical tracking
piezoelectric devices
Robotics
Robots
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
title Micron: An Actively Stabilized Handheld Tool for Microsurgery
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