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A Teleoperated Robotic System-Assisted Percutaneous Transiliac-Transsacral Screw Fixation Technique

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A multi-view Opto-Xray imaging system: development and first application in trauma surgery.

Joerg Traub¹, Tim Hauke Heibel, Philipp Dressel

¹Computer Aided Medical Procedures (CAMP), TUM, Munich, Germany.

Medical Image Computing and Computer-Assisted Intervention : MICCAI ... International Conference on Medical Image Computing and Computer-Assisted Intervention

|November 30, 2007

Summary

This study introduces a novel multi-view Opto-Xray system for 3D navigation in orthopedic and trauma surgery. It enhances surgical precision by accurately tracking instruments using optical markers and X-ray imaging, reducing radiation exposure.

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Area of Science:

Medical Imaging
Computer-Aided Surgery
Orthopedic Surgery

Background:

Minimally invasive orthopedic and trauma procedures increasingly rely on fluoroscopic imaging.
Existing systems aim to reduce radiation exposure during these procedures.
Navab et al. developed an optical imaging system with identical geometry to X-ray imaging.

Purpose of the Study:

To develop an extended multi-view Opto-Xray system for 3D navigation in trauma and orthopedic surgery.
To enable accurate instrument tracking and 3D localization without external systems.
To evaluate the system's accuracy and effectiveness in pedicle screw placement.

Main Methods:

Implemented a multi-view system with two orthogonal video cameras and at least two X-ray images.
Equipped surgical tools with optical markers for tracking by the cameras.
Utilized the projective geometry invariance of the cross-ratio to estimate instrument tip position in X-ray images.
Conducted calibration, instrument tracking tests, and phantom/cadaver experiments for spinal surgery.

Main Results:

Demonstrated accurate calibration and instrument tracking in initial tests.
Successfully applied the system for pedicle screw placement in spinal surgery.
Evaluated screw placement accuracy in 3D using postoperative CT scans.

Conclusions:

The developed multi-view Opto-Xray system provides accurate 3D navigation for orthopedic and trauma surgery.
The system enables precise instrument tracking and localization, potentially reducing radiation exposure.
This technology shows promise for improving surgical outcomes in spinal procedures.