Active MR guidance of interventional devices with target-navigation

Area of Science:

• Medical Imaging
• Biomedical Engineering
• Interventional Radiology

Background:

• Accurate guidance of invasive devices during medical procedures is crucial.
• Existing methods like roadmap images can suffer from misregistration errors.
• Real-time tracking of device position and orientation is essential for safety and efficacy.

Purpose of the Study:

• To develop and validate a novel technique for MRI-guided invasive device insertion.
• To enable simultaneous MR imaging and real-time device tracking.
• To improve the accuracy and safety of interventional procedures through enhanced visualization.

Main Methods:

• Incorporation of a novel inductive coupling structure with three micro-coils into the device tip.
• Development of a target-navigation technique for automatic MR scan plane definition.
• Application of time domain multiplexing for simultaneous MR imaging and device tracking.
• Design of a graphical user interface (GUI) for physician assistance.

Main Results:

• The technique successfully determined invasive device tip position and orientation.
• MR images consistently displayed both the invasive device and target tissue.
• Automatic MR scan plane definition eliminated the need for roadmap images and their associated errors.
• Ex vivo and in vivo experiments demonstrated the feasibility and effectiveness of the method.

Conclusions:

• The developed technique offers a new active method for interventional device guidance using MRI.
• This approach enhances precision and reduces potential errors in image-guided interventions.
• The integrated system provides real-time feedback for improved procedural outcomes.