13 March 2018 Technical note: an augmented reality system for total hip arthroplasty
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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.
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Javad Fotouhi, Javad Fotouhi, Clayton P. Alexander, Clayton P. Alexander, Mathias Unberath, Mathias Unberath, Giacomo Taylor, Giacomo Taylor, Sing Chun Lee, Sing Chun Lee, Bernhard Fuerst, Bernhard Fuerst, Alex Johnson, Alex Johnson, Greg Osgood, Greg Osgood, Russell H. Taylor, Russell H. Taylor, Harpal Khanuja, Harpal Khanuja, Nassir Navab, Nassir Navab, Mehran Armand, Mehran Armand, } "Technical note: an augmented reality system for total hip arthroplasty", Proc. SPIE 10576, Medical Imaging 2018: Image-Guided Procedures, Robotic Interventions, and Modeling, 105760J (13 March 2018); doi: 10.1117/12.2322399; https://doi.org/10.1117/12.2322399

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