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Updated: May 14, 2026
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A Spine Robotic-Assisted Navigation System for Pedicle Screw Placement
Published on: May 11, 2020
Tracking and position control of an MRI-powered needle-insertion robot
Christos Bergeles1, Lei Qin, Panagiotis Vartholomeos
1Cardiovascular Surgery, Children’s Hospital Boston, Harvard Medical School, Boston, MA 02115, USA. Christos.Bergeles@childrens.harvard.edu
Summary
This study introduces an MRI-powered surgical robot for automated procedures. The robot uses MRI pulses for imaging and actuation, enabling precise needle insertion with optimized tracking and control.
Area of Science:
- Medical Robotics
- Magnetic Resonance Imaging (MRI) Applications
Background:
- MRI is increasingly used for interventional procedures.
- Existing MRI-compatible robots use traditional actuation.
- A novel MRI-powered robot offers integrated imaging and actuation.
Purpose of the Study:
- To report on the tracking and control of an MRI-powered robot.
- To advance towards automated surgical procedures using MRI technology.
- To optimize an algorithm for robot tracking and control within an MRI environment.
Main Methods:
- Tracking an MRI-powered robot using non-selective RF pulses and balanced gradient readouts.
- Implementing spoiler gradients and background suppression to improve signal-to-noise ratio.
- Utilizing a Kalman filter for enhanced tracking robustness.
Main Results:
- Quantified the effects of tracking optimization techniques.
- Demonstrated position-controlled needle insertion ex vivo using the developed algorithm.
- Showcased the robot's capability to generate adequate forces for tissue puncture.
Conclusions:
- The developed tracking and control algorithm is effective for MRI-powered robots.
- This technology shows promise for automated interventional procedures.
- Further optimization can enhance the precision and reliability of MRI-guided robotic surgery.
