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Proceedings Paper

Technical note: an augmented reality system for total hip arthroplasty
Author(s): Javad Fotouhi; Clayton P. Alexander; Mathias Unberath; Giacomo Taylor; Sing Chun Lee; Bernhard Fuerst; Alex Johnson; Greg Osgood; Russell H. Taylor; Harpal Khanuja; Nassir Navab; Mehran Armand
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Paper Abstract

Proper implant alignment is a critical step in total hip arthroplasty (THA) procedures. In current practice, correct alignment of the acetabular cup is verified in C-arm X-ray images that are acquired in an anteriorposterior (AP) view. Favorable surgical outcome is, therefore, heavily dependent on the surgeon’s experience in understanding the 3D orientation of a hemispheric implant from 2D AP projection images. This work proposes an easy to use intra-operative component planning system based on two C-arm X-ray images that is combined with 3D augmented reality (AR) visualization that simplifies impactor and cup placement according to the planning by providing a real-time RGBD data overlay. We evaluate the feasibility of our system in a user study comprising four orthopedic surgeons at the Johns Hopkins Hospital, and also report errors in translation, anteversion, and abduction as low as 1.98 mm, 1.10°, and 0.53°, respectively. The promising performance of this AR solution shows that deploying this system could eliminate the need for excessive radiation, simplify the intervention, and enable reproducibly accurate placement of acetabular implants.

Paper Details

Date Published: 13 March 2018
PDF: 8 pages
Proc. SPIE 10576, Medical Imaging 2018: Image-Guided Procedures, Robotic Interventions, and Modeling, 105760J (13 March 2018); doi: 10.1117/12.2322399
Show Author Affiliations
Javad Fotouhi, Johns Hopkins Univ. (United States)
Clayton P. Alexander, Johns Hopkins Hospital (United States)
Mathias Unberath, Johns Hopkins Univ. (United States)
Giacomo Taylor, Johns Hopkins Univ. (United States)
Sing Chun Lee, Johns Hopkins Univ. (United States)
Bernhard Fuerst, Johns Hopkins Univ. (United States)
Alex Johnson, Johns Hopkins Hospital (United States)
Greg Osgood, Johns Hopkins Hospital (United States)
Russell H. Taylor, Johns Hopkins Univ. (United States)
Harpal Khanuja, Johns Hopkins Hospital (United States)
Nassir Navab, Johns Hopkins Univ. (United States)
Technische Univ. Munchen (Germany)
Mehran Armand, Johns Hopkins Univ. (United States)

Published in SPIE Proceedings Vol. 10576:
Medical Imaging 2018: Image-Guided Procedures, Robotic Interventions, and Modeling
Baowei Fei; Robert J. Webster III, Editor(s)

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