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Augmented reality visualization for aiding biopsy procedure according to computed tomography based virtual plan.

Marcin Majak1, Magdalena Żuk1, Ewelina Świątek-Najwer1

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Summary

This study developed an intraoperative navigation module for navigated brain biopsies using an optical see-through head-mounted display (HMD). The HMD system demonstrated comparable accuracy to external displays, enhancing ergonomics and surgeon focus.

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Area of Science:

  • Medical Imaging
  • Surgical Navigation
  • Augmented Reality

Background:

  • Navigated biopsy procedures require precise instrument guidance.
  • Traditional external displays can obstruct the surgical field of view.

Purpose of the Study:

  • To develop and validate an intraoperative module for navigated biopsy using an optical see-through head-mounted display (HMD).
  • To compare the accuracy and ergonomics of HMD-based augmented reality visualization against external display visualization.

Main Methods:

  • Preoperative planning of biopsy trajectories, including entry and endpoints, considering resection margins.
  • Performance of navigated biopsy procedures on a brain phantom by two users.
  • Comparison of two visualization techniques: HMD-based augmented reality with personalized calibration versus external display visualization.

Main Results:

  • Averaged errors for the external display were 2.04 ± 0.83 mm and 2.69 ± 1.11 mm.
  • Averaged errors for the HMD were 2.50 ± 0.93 mm and 2.17 ± 0.82 mm.
  • Both methods achieved comparable accuracy, with HMD potentially offering ergonomic benefits.

Conclusions:

  • Personalized calibration and proper HMD use enable navigated biopsy with accuracy comparable to external displays.
  • Augmented reality visualization via HMD improves ergonomics and maintains direct line of sight to the surgical field.
  • Achieving high accuracy with HMD-based AR requires meticulous calibration and user experience.