Virtually extended surgical drilling device: virtual mirror for navigated spine surgery.

Area of Science:

• Neurosurgery
• Medical Imaging
• Surgical Navigation

Background:

• Traditional navigated spine surgery relies on 2D monitor displays.
• Accurate pedicle screw placement is crucial for spinal stabilization.
• Current methods can be limited by visualization and intuitive control.

Purpose of the Study:

• To introduce and evaluate a novel stereoscopic video see-through head-mounted display (HMD) navigation system for spine surgery.
• To assess the system's usability and accuracy in preparing pedicle screw insertion canals.
• To compare the HMD system with conventional monitor-based navigation.

Main Methods:

• Volumetric CT data segmentation and in-situ visualization of vertebrae.
• Development of a virtually extended surgical drilling device with mirror augmentation.
• System testing by five surgeons using lumbar vertebrae replicas.
• Comparison with monitor-based navigation, measuring procedure time and drilling accuracy via CT scans.

Main Results:

• The HMD system offers intuitive planning and control for the surgical drilling device.
• Surgeons tested the system's feasibility in a realistic surgical simulation.
• Quantitative data on procedure time and drilling accuracy were collected for comparison.

Conclusions:

• The stereoscopic HMD navigation system shows potential for improving navigated spine surgery.
• The virtually extended drilling device facilitates precise canal preparation for pedicle screws.
• Further evaluation is warranted to confirm clinical benefits in navigated spine surgery.