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3 April 2023Multi-body 3D-2D registration for robot-assisted joint reduction: preclinical evaluation in the ankle syndesmosis
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R. C. Vijayanhttps://orcid.org/0000-0003-4132-0783,1 K. Venkataraman,1 J. Wei,1 N. M. Sheth,1 B. Shafiq,2 J. H. Siewerdsenhttps://orcid.org/0000-0001-6644-1317,1,3 W. Zbijewski,1 G. Li,4 K. Cleary,4 A. Unerihttps://orcid.org/0000-0003-3419-18055

1Johns Hopkins Univ. (United States)
2Johns Hopkins Medicine (United States)
3The Univ. of Texas M. D. Anderson Cancer Ctr. (United States)
4Children's National Hospital (United States)
5Johns Hopkins Univ. (United States)
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Abstract
Existing methods to improve the accuracy of tibiofibular joint reduction present workflow challenges, high radiation exposure, and a lack of accuracy and precision, leading to poor surgical outcomes. To address these limitations, we propose a method to perform robot-assisted joint reduction using intraoperative imaging to align the dislocated fibula to a target pose relative to the tibia. The approach (1) localizes the robot via 3D-2D registration of a custom plate adapter attached to its end effector, (2) localizes the tibia and fibula using multi-body 3D-2D registration, and (3) drives the robot to reduce the dislocated fibula according to the target plan. The custom robot adapter was designed to interface directly with the fibular plate while presenting radiographic features to aid registration. Registration accuracy was evaluated on a cadaveric ankle specimen, and the feasibility of robotic guidance was assessed by manipulating a dislocated fibula in a cadaver ankle. Using standard AP and mortise radiographic views registration errors were measured to be less than 1 mm and 1° for the robot adapter and the ankle bones. Experiments in a cadaveric specimen revealed up to 4 mm deviations from the intended path, which was reduced to ⪅2 mm using corrective actions guided by intraoperative imaging and 3D-2D registration. Preclinical studies suggest that significant robot flex and tibial motion occur during fibula manipulation, motivating the use of the proposed method to dynamically correct the robot trajectory. Accurate robot registration was achieved via the use of fiducials embedded within the custom design. Future work will evaluate the approach on a custom radiolucent robot design currently under construction and verify the solution on additional cadaveric specimens.
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R. C. Vijayan,K. Venkataraman,J. Wei,N. M. Sheth,B. Shafiq,J. H. Siewerdsen,W. Zbijewski,G. Li,K. Cleary, andA. Uneri"Multi-body 3D-2D registration for robot-assisted joint reduction: preclinical evaluation in the ankle syndesmosis", Proc. SPIE 12466, Medical Imaging 2023: Image-Guided Procedures, Robotic Interventions, and Modeling, 124661F (3 April 2023);https://doi.org/10.1117/12.2654481
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KEYWORDS
Image registration
Bone
Robotics
Radiography
Fluoroscopy
Image guided intervention
Orthopedic imaging
Robotic surgery
X-ray computed tomography
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R. C. Vijayan, K. Venkataraman, J. Wei, N. M. Sheth, B. Shafiq, J. H. Siewerdsen, W. Zbijewski, G. Li, K. Cleary, A. Uneri, "Multi-body 3D-2D registration for robot-assisted joint reduction: preclinical evaluation in the ankle syndesmosis," Proc. SPIE 12466, Medical Imaging 2023: Image-Guided Procedures, Robotic Interventions, and Modeling, 124661F (3 April 2023); https://doi.org/10.1117/12.2654481
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