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Related Experiment Video

Updated: Mar 13, 2026

Evaluation of the Feasibility, Safety, and Accuracy of an Intraoperative High-intensity Focused Ultrasound Device for Treating Liver Metastases

Evaluation of the Feasibility, Safety, and Accuracy of an Intraoperative High-intensity Focused Ultrasound Device for Treating Liver Metastases

Published on: January 9, 2019

Robot-assistant for MRI-guided liver ablation: A pilot study.

Enrico Franco¹, Mike Ristic¹, Marc Rea²

¹Mechanical Engineering Department, Imperial College London, London SW7 AZ, United Kingdom.

Medical Physics

|October 27, 2016

Summary

A novel robotic system assists clinicians with MRI-guided liver tumor ablation, improving accuracy and simplifying complex needle insertions. This robot is MRI-compatible and suitable for clinical use, enhancing percutaneous interventions.

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Last Updated: Mar 13, 2026

Evaluation of the Feasibility, Safety, and Accuracy of an Intraoperative High-intensity Focused Ultrasound Device for Treating Liver Metastases

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Treatment of Liver Metastases Using an Internal Target Volume Method for Stereotactic Body Radiotherapy

Treatment of Liver Metastases Using an Internal Target Volume Method for Stereotactic Body Radiotherapy

Published on: May 8, 2018

Area of Science:

Medical Robotics
Interventional Radiology
Image-Guided Therapy

Background:

Percutaneous ablation under MRI-guidance offers a local treatment for inoperable liver tumors.
Manual probe placement for these procedures is time-consuming, error-prone, and demands extensive training.

Purpose of the Study:

To introduce a novel pneumatically actuated robotic instrument designed to aid clinicians in MRI-guided percutaneous liver interventions.
To evaluate the functionality and clinical applicability of this robotic system.

Main Methods:

The robot system was developed to support challenging double oblique needle insertions.
System accuracy and repeatability were quantified using an optical tracking system.
Clinical functionality was assessed in a pilot study involving two patients undergoing MRI-guided laser ablation.

Main Results:

The robot demonstrated high repeatability (0.35 mm mean error) and accuracy (2.5 mm mean needle tip error at 195 mm).
The system proved to be MRI-compatible, integrating seamlessly into the clinical workflow without affecting image quality.
Successful robot-assisted procedures were completed, including a complex double oblique insertion.

Conclusions:

The robot's accuracy and repeatability are suitable for treating liver tumors via MRI-guided ablation.
The pilot study validates the robot's clinical functionality, MRI compatibility, and effectiveness in double-oblique needle insertions.