Registration-free Workflow for Stereotactic Neurosurgery Guided by a Novel Electromagnetic Navigation System.

Area of Science:

• Neurosurgery
• Medical Imaging
• Biomedical Engineering

Background:

• Electromagnetic navigation systems (ENS) are crucial for precise electrode tracking in deep brain stimulation (DBS) surgery.
• Integration into surgical workflows is hindered by the need for efficient patient-to-image registration.
• Stereotactic systems are the standard for electrode implantation in DBS.

Purpose of the Study:

• To develop and evaluate a novel registration system for ENS in stereotactic neurosurgery.
• To enable seamless integration of ENS into the surgical workflow without intraoperative imaging.
• To improve the accuracy and efficiency of electrode placement during DBS procedures.

Main Methods:

• A new registration system utilizing flexible markers with magnetic sensors and wireless communication attached to the stereotactic frame.
• Markers are visible on preoperative CT scans, allowing for automatic segmentation and registration.
• System performance evaluated through point matching error and target registration error during implantation tests.

Main Results:

• The registration method achieved an average point matching error of 1.51 mm after automatic marker segmentation on CT images.
• The system localized ENS sensors with a target registration error of 2.54 ± 0.92 mm in implantation tests.
• Demonstrated a registration-free approach, reducing reliance on repeated intraoperative imaging.

Conclusions:

• The novel registration system effectively integrates ENS into stereotactic procedures.
• The system streamlines surgical workflows by eliminating the need for additional intraoperative imaging.
• This approach enhances precision in electrode positioning and orientation monitoring during DBS surgery.