tailieunhanh - Báo cáo hóa học: "Research Article 3D Elbow Kinematics with Monoplanar Fluoroscopy: In Silico Evaluation"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article 3D Elbow Kinematics with Monoplanar Fluoroscopy: In Silico Evaluation | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2010 Article ID 142989 10 pages doi 2010 142989 Research Article 3D Elbow Kinematics with Monoplanar Fluoroscopy In Silico Evaluation L. Tersi S. Fantozzi and R. Stagni Department of Electronics Computer Science and Systems DEIS University of Bologna Via Venezia 52 147023 Cesena Italy Correspondence should be addressed to L. Tersi Received 1 May 2009 Revised 6 August 2009 Accepted 14 September 2009 Academic Editor Joao Manuel R. S. Tavares Copyright 2010 L. Tersi et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. An in-silico assessment of the performance of 3D video-fluoroscopy for the analysis of the kinematics of long bones is proposed. A reliable knowledge of in-vivo joints kinematics in physiological conditions is fundamental in the clinical field. 3D videofluoroscopy theoretically permits a mm deg level of accuracy in joint motion analysis but the optimization algorithm for the pose estimation is highly dependent on the geometry of the bone segment analyzed. An automated technique based on distance maps and tangency condition was applied to the elbow bones. The convergence domain was explored to quantify and optimize measurement accuracy in terms of bias and precision. By conditioning the optimization algorithm using simple image features the estimation error had small dispersion interquartile range within and mm deg for out-of-plane and in-plane pose parameters resp. but with occasional bias and outliers. 3D video-fluoroscopy produced promising results for the elbow joint but further in-vitro validation studies should be carried out. 1. Introduction 3D video-fluoroscopy is a technique for the evaluation of joint kinematics based on the alignment of 3D models of bones or .