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Updated: Dec 31, 2025

Pedicle Screw Placement Using an Augmented Reality Head-Mounted Display in a Porcine Model
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Smartphone Augmented Reality CT-Based Platform for Needle Insertion Guidance: A Phantom Study.

Rachel Hecht1, Ming Li2, Quirina M B de Ruiter1

  • 1Center for Interventional Oncology, Radiology and Imaging Sciences, Clinical Center, National Institutes of Health, Bethesda, MD, 20892, USA.

Cardiovascular and Interventional Radiology
|January 10, 2020
PubMed
Summary
This summary is machine-generated.

This study developed an augmented reality (AR) smartphone app for needle guidance. The AR app significantly improved needle insertion accuracy and reduced procedure times compared to traditional CT guidance.

Keywords:
AblationAugmented realityBiopsyInterventional radiologyNeedle guidancePhantomPhysician training

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Area of Science:

  • Medical Imaging
  • Surgical Technology
  • Computer-Assisted Surgery

Background:

  • Percutaneous procedures require precise needle placement.
  • Current guidance methods like CT-guided freehand can be time-consuming and involve radiation exposure.

Purpose of the Study:

  • To develop and evaluate the accuracy of a novel augmented reality (AR) smartphone application for real-time needle guidance.
  • To compare the performance of the AR guidance system against conventional CT-guided freehand techniques.

Main Methods:

  • An AR needle guidance smartphone application was developed using Unity and Vuforia SDK.
  • Eleven operators performed needle insertions in a phantom using AR guidance and CT-guided freehand.
  • Placement accuracy was measured on CT scans, and procedural times were recorded.

Main Results:

  • AR guidance resulted in 78% less insertion error compared to CT-guided freehand (2.69 mm vs. 12.51 mm).
  • Interventional radiologists using AR guidance achieved first-attempt success, eliminating the need for intraoperative CT scans.
  • Average procedural time was reduced by 66% with AR guidance (4.5 min vs. 13.1 min).

Conclusions:

  • The smartphone-based AR guidance application demonstrated superior needle insertion accuracy over CT-guided freehand.
  • This AR platform shows potential for enhancing percutaneous biopsies and ablations by improving accuracy, speed, and reducing radiation exposure.