tailieunhanh - báo cáo hóa học:" New fluoroscopic imaging technique for investigation of 6DOF knee kinematics during treadmill gait"

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học quốc tế đề tài : New fluoroscopic imaging technique for investigation of 6DOF knee kinematics during treadmill gait | Journal of Orthopaedic Surgery and Research BioMed Central Open Access Technical Note New fluoroscopic imaging technique for investigation of 6DOF knee kinematics during treadmill gait Guoan Li Michal Kozanek Ali Hosseini Fang Liu Samuel K Van de Velde and Harry E Rubash Address Bioengineering Laboratory GRJ 1215 Massachusetts General Hospital 55 Fruit Street Boston MA 02114 USA Email Guoan Li - gli1@ Michal Kozanek - mkozanek@ Ali Hosseini - ahosseini@ Fang Liu - fliu4@ Samuel K Van de Velde - svandevelde@ Harry E Rubash - hrubash@ Corresponding author Published 13 March 2009 Received 14 November 2008 Journal of Orthopaedic Surgery and Research 2009 4 6 doi l749-799X-4-6 Accepted I3 March 2009 This article is available from http content 4 1 6 2009 Li et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Introduction This report presents a new imaging technique for non-invasive study of six degrees of freedom DOF knee kinematics during treadmill gait. Materials and methods A treadmill was integrated into a dual fluoroscopic imaging system DFIS to formulate a gait analysis system. To demonstrate the application of the system a healthy subject walked on the treadmill at four different speeds and MPH while the DFIS captured the knee motion during three strides under each speed. Characters of knee joint motion were analyzed in 6DOF during the treadmill walking. Results The speed of the knee motion was lower than that of the treadmill. Flexion amplitudes increased with increasing walking speed. Motion patterns in other DOF were not affected by increase in walking speed. The motion character was repeatable