Towards Tracking of Deep Brain Stimulation Electrodes Using an Integrated Magnetometer.

Area of Science:

• Neurosurgery
• Medical Devices
• Biomedical Engineering

Background:

• Deep brain stimulation (DBS) is a crucial treatment for movement disorders, necessitating precise electrode placement for efficacy.
• Current surgical procedures face challenges in accurately positioning DBS implants, impacting treatment outcomes.
• Bridging preoperative imaging and intraoperative guidance is essential for enhancing surgical control.

Purpose of the Study:

• To present a novel magnetic tracking system for DBS electrode implantation.
• To improve surgical accuracy and control during DBS procedures.
• To enable real-time monitoring of electrode position during and after surgery.

Main Methods:

• Development of a magnetic tracking system utilizing magnetometers integrated into DBS electrodes.
• Experimental mapping of a three-coil magnetic source using a custom 3D magnetic camera.
• Validation of the system's 3D, non-line-of-sight tracking capabilities using MRI on a brain model.

Main Results:

• Experimental demonstration of a magnetic tracking system for DBS electrode placement.
• Achieved a mean absolute error of 1.35 mm and a Euclidean error of 3.07 mm in tracking accuracy.
• Identified areas for further development to achieve sub-millimeter accuracy.

Conclusions:

• Magnetometer-based tracking offers a promising approach to enhance DBS surgery precision.
• The proposed system can improve surgeon control over implantation trajectories.
• Further refinement could lead to sub-millimeter accuracy, significantly advancing DBS procedures.