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• W3046011767 abstract "Femoroplasty is a proposed alternative therapeutic method for preventing osteoporotic hip fractures in the elderly. Previously developed navigation system for femoroplasty required the attachment of an external X-ray fiducial to the femur. We propose a fiducial-free 2D/3D registration pipeline using fluoroscopic images for robot-assisted femoroplasty. Intraoperative fluoroscopic images are taken from multiple views to perform registration of the femur and drilling/injection device. The proposed method was tested through comprehensive simulation and cadaveric studies. Performance was evaluated on the registration error of the femur and the drilling/injection device. In simulations, the proposed approach achieved a mean accuracy of 1.26 ± 0.74 mm for the relative planned injection entry point; 0.63 ± 0.21° and 0.17 ± 0.19° for the femur injection path direction and device guide direction, respectively. In the cadaver studies, a mean error of 2.64 ± 1.10 mm was achieved between the planned entry point and the device guide tip. The biomechanical analysis showed that even with a 4 mm translational deviation from the optimal injection path, the yield load prior to fracture increased by 40.7%. This result suggests that the fiducial-less 2D/3D registration is sufficiently accurate to guide robot assisted femoroplasty." @default.
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• W3046011767 date "2020-08-01" @default.
• W3046011767 modified "2023-10-16" @default.
• W3046011767 title "Fiducial-Free 2D/3D Registration for Robot-Assisted Femoroplasty" @default.
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• W3046011767 doi "https://doi.org/10.1109/tmrb.2020.3012460" @default.
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