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Augmented marker tracking for peri-acetabular osteotomy surgery.

Silvio Pflugi1, Rakesh Vasireddy2, Till Lerch3

  • 1Institute for Surgical Technology and Biomechanics, University of Bern, Bern, Switzerland. silvio.pflugi@istb.unibe.ch.

International Journal of Computer Assisted Radiology and Surgery
|December 1, 2017
PubMed
Summary
This summary is machine-generated.

This study introduces a novel navigation system for acetabular reorientation during peri-acetabular osteotomy (PAO). The hybrid augmented marker system accurately measures acetabular orientation, proving its feasibility in cadaver and bone studies.

Keywords:
Computer-assisted surgeryNavigationPAO surgery

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Area of Science:

  • Orthopedic surgery
  • Medical robotics
  • Image-guided surgery

Background:

  • Peri-acetabular osteotomy (PAO) requires precise acetabular reorientation.
  • Current navigation systems may have limitations in accuracy and complexity.

Purpose of the Study:

  • To develop and validate a hybrid augmented marker-based navigation system for acetabular reorientation in PAO.
  • To assess the system's accuracy in measuring inclination and anteversion.

Main Methods:

  • A hybrid system combining a tracking unit, an augmented marker (Aruco marker + IMU), and a host computer was developed.
  • Sensor fusion using a Kalman filter integrated data from marker tracking and IMU.
  • Validation performed using plastic bone and cadaver studies, comparing results to an optical tracking system.

Main Results:

  • The system demonstrated high accuracy in both plastic bone and cadaver studies.
  • Mean absolute differences for inclination and anteversion were low (e.g., 1.34° and 1.21° in the cadaver study).
  • Very strong correlations were observed between the proposed system and the reference system.

Conclusions:

  • The developed hybrid augmented marker-based navigation system is feasible for measuring acetabular orientation during PAO.
  • The system shows potential for improving precision in PAO procedures.