Marker Configuration Model-Based Roentgen Fluoroscopic Analysis

摘要: Abstract It remains unknown if and how the polyethylene bearing in mobile knees moves during dynamic activities with respect to tibial base plate. Marker Configuration Model-Based Roentgen Fluoroscopic Analysis (MCM-based RFA) uses a marker configuration model of inserted tantalum markers order accurately estimate pose an implant or bone using single plane images fluoroscopic images. The goal this study is assess accuracy (MCM-Based standard set-up phantom experiments determine error propagation computer simulations. experimental was calibrated calibration box equipped 600 markers, which corrected for image distortion determined focus position. In simulation influence distortion, MC-model accuracy, position, relative distance between MC-models on MCM-Based RFA were assessed. established that in-plane 0.1 mm out-of-plane 0.9 mm. rotational 0.1°. A ninth-order polynomial used correct distortion. Marker-Based estimated have, worst case scenario, vivo translational 0.14 mm ( x -axis), 0.17 mm y 1.9 mm z respectively, 0.3°. When fluoroscopy kinematics, models are important factors, measurements. has potential be accurate, clinically useful tool studying kinematics after total joint replacement equipment.