Magnetic resonance (MR) imaging (MRI) has become the preferred method for medical diagnosis due to high resolution images and lack of ionizing radiation. Recently, the potential for using MRI to obtain real-time image feedback for targeted therapeutic procedures such as targeted biopsies and injections has been explored [1]. Some devices designed for intra-MRI use exist and more such devices are currently being developed and researched. Procedures often require precise positional targeting, such as injections and biopsies, and an MRI safe controlled-motion stepper motor is an ideal choice for actuating these mechanical devices. Some such drivers have been developed, but for various reasons, none are considered to be the standard for MRI use at this time. Therefore, a new design combining certain aspects of previous motors has been developed, making use of newer three-dimensional (3D) printers with extreme accuracy. Presented is a small, low-cost plastic four-cylinder piston stepper motor which is actuated by pressurized air. Connected to a plastic gearbox, this motor is capable of driving a rotational shaft at torques of up to 20 N·mm by increments of 3.6 degrees.
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2018 Design of Medical Devices Conference
April 9–12, 2018
Minneapolis, Minnesota, USA
ISBN:
978-0-7918-4078-8
PROCEEDINGS PAPER
Pneumatic Piston Stepper Motor: An Enabler for MRI-Guided Robotic Interventions
Brian L. Boland,
Brian L. Boland
University of Georgia, Athens, GA
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Sheng Xu,
Sheng Xu
National Institutes of Health, Bethesda, MD
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Bradford Wood,
Bradford Wood
National Institutes of Health, Bethesda, MD
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Zion Tsz Ho Tse
Zion Tsz Ho Tse
University of Georgia, Athens, GA
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Brian L. Boland
University of Georgia, Athens, GA
Sheng Xu
National Institutes of Health, Bethesda, MD
Bradford Wood
National Institutes of Health, Bethesda, MD
Zion Tsz Ho Tse
University of Georgia, Athens, GA
Paper No:
DMD2018-6890, V001T07A009; 4 pages
Published Online:
June 14, 2018
Citation
Boland, BL, Xu, S, Wood, B, & Tse, ZTH. "Pneumatic Piston Stepper Motor: An Enabler for MRI-Guided Robotic Interventions." Proceedings of the 2018 Design of Medical Devices Conference. 2018 Design of Medical Devices Conference. Minneapolis, Minnesota, USA. April 9–12, 2018. V001T07A009. ASME. https://doi.org/10.1115/DMD2018-6890
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