Mixed Reality Needle Guidance Application on Smartglasses Without Pre-procedural CT Image Import with Manually Matching Coordinate Systems

Satoru Morita*, Kazufumi Suzuki, Takahiro Yamamoto, Motoki Kunihara, Hiroyuki Hashimoto, Kayo Ito, Shuhei Fujii, Jun Ohya, Ken Masamune, Shuji Sakai

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: To develop and assess the accuracy of a mixed reality (MR) needle guidance application on smartglasses. Materials and Methods: An MR needle guidance application on HoloLens2, without pre-procedural CT image reconstruction or import by manually matching the spatial and MR coordinate systems, was developed. First, the accuracy of the target locations in the image overlay at 63 points arranged on a 45 × 35 × 21 cm box and needle angles from 0° to 80°, placed using the MR application, was verified. The needle placement errors from 12 different entry points in a phantom by seven operators (four physicians and three non-physicians) were compared using a linear mixed model between the MR guidance and conventional methods using protractors. Results: The average errors of the target locations and needle angles placed using the MR application were 5.9 ± 2.6 mm and 2.3 ± 1.7°, respectively. The average needle insertion error using the MR guidance was slightly smaller compared to that using the conventional method (8.4 ± 4.0 mm vs. 9.6 ± 5.1 mm, p = 0.091), particularly in the out-of-plane approach (9.6 ± 3.5 mm vs. 12.3 ± 4.6 mm, p = 0.003). The procedural time was longer with MR guidance than with the conventional method (412 ± 134 s vs. 219 ± 66 s, p < 0.001). Conclusion: MR needle guidance without pre-procedural CT image import is feasible when matching coordinate systems, and the accuracy of needle insertion is slightly better than that of the conventional method.

Original languageEnglish
Pages (from-to)349-356
Number of pages8
JournalCardioVascular and Interventional Radiology
Volume45
Issue number3
DOIs
Publication statusPublished - 2022 Mar

Keywords

  • Augmented reality
  • Interventional radiology
  • Mixed reality
  • Needle guidance

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Cardiology and Cardiovascular Medicine

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