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Vision-based markerless registration using stereo vision and an augmented reality surgical navigation system: a pilot

Hideyuki Suenaga1, Huy Hoang Tran2, Hongen Liao3,4

  • 1Department of Oral-Maxillofacial Surgery, Dentistry and Orthodontics, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo ku, Tokyo, 113 8656, Japan. suenaga-tky@umin.ac.jp.

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Summary

This study demonstrates a novel augmented reality (AR) system for markerless surgical navigation in oral surgery. The system uses stereo vision for accurate 3D image registration and display, with potential for significant clinical applications.

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Area of Science:

  • Medical Technology
  • Surgical Navigation
  • Augmented Reality

Background:

  • Oral and maxillofacial surgery requires precise navigation.
  • Existing navigation systems often rely on fiducial markers.
  • Markerless registration offers a potential advancement.

Purpose of the Study:

  • To evaluate an augmented reality (AR) navigation system with markerless registration using stereo vision.
  • To assess the accuracy and feasibility of this system in oral surgery.

Main Methods:

  • A feasibility study utilized stereo cameras for markerless tracking and registration.
  • Computed tomography (CT) data was used to create 3D integral videography (IV) images.
  • Patient-image registration was achieved through teeth matching using parallax images.

Main Results:

  • The markerless system achieved accurate registration of patient anatomy with stereoscopic images (< 1 mm average target registration error).
  • 3D-CT images were displayed in real space with high accuracy using AR, viewable from any angle without special glasses.
  • Teeth contour matching enabled successful registration without fiducial markers.

Conclusions:

  • Markerless registration and 3D image matching via stereo vision combined with AR show high accuracy.
  • The system successfully displayed 3D-CT images in real space without references or fiducial markers.
  • This technology holds significant potential for clinical applications in oral and maxillofacial surgery.