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A novel motionless calibration method for augmented reality surgery navigation system based on optical tracker.

Xinjun Wan1, Lizhengyi Shen1, Zhiqiang Fang1

  • 1School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.

Heliyon
|January 2, 2023
PubMed
Summary
This summary is machine-generated.

This study introduces a novel, motionless calibration method for augmented reality (AR) surgery navigation. This technique simplifies calibration, improving accuracy and potentially enabling real-time updates for enhanced surgical guidance.

Keywords:
Augmented realityOptical trackerPNPSurgical navigationVirtual and real calibration

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Area of Science:

  • Medical Imaging
  • Computer-Assisted Surgery
  • Augmented Reality

Background:

  • Augmented reality (AR) surgery navigation systems enhance operations by overlaying virtual models onto the real surgical field.
  • Accurate calibration between virtual and real-world coordinates is crucial for effective virtual-real fusion.
  • Existing calibration methods often involve complex manual procedures for users.

Purpose of the Study:

  • To introduce a novel, motionless method for virtual-real calibration in AR surgery navigation systems.
  • To simplify the calibration process, making it more convenient and rapid for clinical application.
  • To improve the accuracy and robustness of AR-based surgical guidance.

Main Methods:

  • A motionless calibration approach using mixed reality images captured by AR glasses' forward camera.
  • Calculation of the virtual-real mapping relationship using the camera coordinate system as a medium.
  • Design and implementation of the mathematical principles for calibration and verification experiments.

Main Results:

  • The proposed method achieved an average registration accuracy of approximately 5.80mm, comparable to previous methods.
  • The calibration is convenient, rapid, and user-experience independent.
  • Potential for real-time updates of the registration transformation matrix to enhance accuracy during AR glasses movement.

Conclusions:

  • The novel motionless calibration method offers a significant improvement in convenience and speed for AR surgery navigation.
  • The achieved accuracy is comparable to existing techniques, with potential for real-time adaptability.
  • This method holds great promise for future clinical navigation research and applications.