Related Experiment Video
Updated: Aug 12, 2025

Adaptation of a Haptic Robot in a 3T fMRI
Published on: October 4, 2011
MRI-compatible electromagnetic servomotor for image-guided medical robotics
Lorne W Hofstetter1, Rock Hadley1, Robb Merrill1
1Department of Radiology and Imaging Sciences, University of Utah School of Medicine, 30 North 1900 East #1A071, Salt Lake City, Utah, 84132, USA.
Researchers developed a novel non-magnetic electromagnetic servomotor for MRI-compatible robotics. This innovation enables precise robotic control within MRI scanners, enhancing safety and accuracy in image-guided medical procedures.
Area of Science:
- Medical Robotics
- Biomedical Engineering
- Magnetic Resonance Imaging
Background:
- Magnetic resonance imaging (MRI) offers superior soft-tissue visualization for image-guided procedures.
- Existing MRI-compatible robotics are limited by conventional electromagnetic motors posing safety risks in strong magnetic fields.
- The development of safe and effective robotic systems for use within MRI environments remains a significant challenge.
Purpose of the Study:
- To design and develop a novel electromagnetic servomotor that is fully compatible with the magnetic field of an MRI scanner.
- To integrate this servomotor into a functional robot capable of performing tissue manipulation during MRI.
- To demonstrate the safety and efficacy of the MRI-compatible robot in a clinical setting.
Main Methods:
- Construction of an electromagnetic servomotor using non-magnetic materials.
- Generation of high-torque rotary actuation through the interaction of electrical current and the MRI's magnetic field.
- Integration of the servomotor into a robotic system and testing its ability to exert linear forces for instrument insertion during MRI.
Main Results:
- Successful development of a non-magnetic electromagnetic servomotor capable of controlled rotary actuation within a 3 Tesla MRI scanner.
- Demonstration of an MRI-compatible robot utilizing this servomotor, capable of generating sufficient linear force for biopsy instrument insertion.
- Safe operation of the electromagnetic servomotor within the patient area of a clinical MRI scanner during imaging.
Conclusions:
- The novel non-magnetic electromagnetic servomotor represents a breakthrough for MRI-compatible robotics.
- This technology has the potential to significantly improve the precision and safety of various image-guided medical interventions.
- Further development could lead to widespread adoption in clinical MRI environments for enhanced surgical and diagnostic procedures.
More Related Videos
07:41Design and Implementation of a Bespoke Robotic Manipulator for Extra-corporeal Ultrasound
Published on: January 7, 2019
07:34Functional MRI in Conjunction with a Novel MRI-compatible Hand-induced Robotic Device to Evaluate Rehabilitation of Individuals Recovering from Hand Grip Deficits
Published on: November 23, 2019
Related Concept Videos
Magnetic Resonance Imaging
Electro-mechanical Systems
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...
Motor Units
Motor Unit Stimulation
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...