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Augmented marker tracking for peri-acetabular osteotomy surgery.

Silvio Pflugi, Rakesh Vasireddy, Till Lerch

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    |October 25, 2017
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    Summary
    This summary is machine-generated.

    We created a cost-effective navigation system for peri-acetabular osteotomy (PAO) surgery. This system accurately tracks acetabular fragment orientation, improving surgical precision.

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    Area of Science:

    • Orthopedic Surgery
    • Medical Navigation Systems
    • Surgical Robotics

    Background:

    • Peri-acetabular osteotomy (PAO) is a complex orthopedic procedure requiring precise acetabular fragment positioning.
    • Existing navigation systems can be expensive or difficult to use, posing challenges in clinical application.
    • Accurate intraoperative tracking of the acetabular fragment is crucial for successful PAO outcomes.

    Purpose of the Study:

    • To develop and validate a novel, small, cost-effective, and user-friendly augmented marker-based hybrid navigation system for PAO surgery.
    • To assess the accuracy and reliability of the proposed system in tracking acetabular fragment orientation.

    Main Methods:

    • A hybrid navigation system was designed, integrating a patient-mounted tracking unit, an augmented marker with an inertial measurement unit (IMU), and a host computer.
    • The system utilizes live video streaming and sensor fusion (Kalman filter) for precise marker pose estimation.
    • Anatomy registration was performed using a pre-existing registration device.
    • Validation was conducted using a plastic bone model, comparing the system against an optical tracking-based navigation system.

    Main Results:

    • The developed hybrid navigation system demonstrated accurate tracking of the acetabular fragment's orientation.
    • Mean absolute differences in inclination and anteversion measurements were 1.63 degrees and 1.55 degrees, respectively.
    • The system's performance was comparable to established optical tracking systems in a simulated surgical environment.

    Conclusions:

    • The augmented marker-based hybrid navigation system is a viable and accurate tool for guiding PAO surgery.
    • Its small size, ease of use, and cost-effectiveness make it a promising solution for clinical adoption.
    • The system's ability to precisely measure acetabular fragment orientation can enhance surgical outcomes in PAO procedures.