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Related Experiment Video

Updated: Mar 5, 2026

Technical Approach for Infrared Tracking for Soft Tissue Navigation with a Holographic Head-Mounted Display and Preclinical Validation
10:25

Technical Approach for Infrared Tracking for Soft Tissue Navigation with a Holographic Head-Mounted Display and Preclinical Validation

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Electromagnetically tracked personalized templates for surgical navigation.

Andrew W L Dickinson1, Michelle L Zec1, David R Pichora1

  • 1Queen's University Kingston, Kingston, K7L 3N6, Canada.

International Journal of Computer Assisted Radiology and Surgery
|March 24, 2017
PubMed
Summary
This summary is machine-generated.

Electromagnetic-tracked anatomical impressions improve orthopedic surgical navigation accuracy. This novel hybrid system uses lines instead of points for better calibration and registration, enhancing image-guided surgery.

Keywords:
Electromagnetic trackingPersonalized templatesSurgical navigationTarget registration error

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Area of Science:

  • Orthopedic Surgery
  • Medical Device Technology
  • Surgical Navigation Systems

Background:

  • Electromagnetic (EM) surgical tracking systems are used in orthopedic navigation.
  • Traditional point-based EM navigation often suffers from poor accuracy.
  • Personalized templates and novel calibration methods are needed to improve accuracy.

Purpose of the Study:

  • To develop and evaluate an improved EM surgical tracking system for orthopedic navigation.
  • To enhance accuracy by using EM-tracked personalized anatomical impressions (templates).
  • To investigate the use of lines, rather than points, for calibration and error evaluation.

Main Methods:

  • Developed EM-tracked anatomical impressions (personalized templates).
  • Calibrated and tested impressions using lines as fiducial objects on CT-derived shoulder models.
  • Compared tracked impressions against EM and optical point-based navigation in various environments.
  • Evaluated preclinical accuracy on a cadaver forearm in a simulated fracture-repair task.

Main Results:

  • High accuracy in calibration of anatomical impressions to EM tracking (0.3 mm position, [Formula: see text] angle).
  • Accurate technical accuracy on shoulder models (2.2 mm position, [Formula: see text] angle) even with surgical instruments.
  • Comparable preclinical accuracy on cadaver forearm (0.4 mm position, [Formula: see text] angle) to point-based optical navigation.
  • Significantly better accuracy than traditional point-based EM or optical navigation.

Conclusions:

  • EM-tracked impressions represent a promising hybrid technology for orthopedic applications.
  • The use of lines as fiducial objects and hybrid navigation improves accuracy.
  • This innovation offers an accurate and ergonomic solution for image-guided orthopedic surgery.