Comparison of Kinematic Results Between METUKISS Ankara UniversityVICON

Comparison of Kinematic Results Between METU-KISS & Ankara University-VICON Gait Analysis Systems EZGİ CİVEK supervised by: Asst. Prof. Dr. Ergin Tönük Prof. Dr. Turgut Tümer 24. 12. 2004 1

Outline n n n 24. 12. 2004 Introduction Gait Analysis Motion Capture Systems Comparison of the two systems Comparison of the kinematic results Future Studies 2

Objective To compare the kinematic results of two different gait analysis systems. Data Acquisition Performance Data Analysis Methodology n Exchanging the motion data between KISS & VICON. n Studying the same subject on each system. 24. 12. 2004 3

Objective To make KISS compatible with a common widely used file format. To enlarge the database available. 24. 12. 2004 4

Gait Analysis of the mechanics of human body during walking, stair ascending/descending, obstacle avoidance. 24. 12. 2004 5

Gait Analysis Gait analysis plays a key role in: 24. 12. 2004 n Diagnosis of disorders in lower extremity n Decision making before operations n Evaluation of prosthetic joint replacements n Comparison of gait parameters before and after operations n Studies in orthotics, amputees, athletic injuries 6

Human Gait 24. 12. 2004 7

Motion Capture Systems HARDWARE n n 24. 12. 2004 CCD Cameras Markers Force Plate(s) EMG Unit SOFTWARE n n Data Acquisition Calculation of Gait Parameters 8

Marker Locations 24. 12. 2004 9

KISS VICON Commercial system Locally developed in ME 6 cameras 2 force plates KISS – DAQ KISS – GAIT Helen Hayes Marker set 24. 12. 2004 5 cameras 2 force plates VICON 370 Vicon Clinical Manager Helen Hayes Marker set 10

File Formats KISS VICON *. hvd *. tvd Raw video data (input for 3 D reconstruction) *. yor *. c 3 d Processed data file (3 D trajectory data) input for kinematic data analysis 24. 12. 2004 11

C 3 D - A 3 D Biomechanics Data Standard 24. 12. 2004 n Developed by Andrew Dainis in 1987. n Used by almost all commercial motion capture systems. 12

Converting *. yor file to *. c 3 d n n n 24. 12. 2004 Export the coordinate data from *. yor file as *. txt format. Arrange the data in text file according to c 3 d format. Create *. c 3 d file by a program called ‘C 3 D Editor’. 13

KISS 24. 12. 2004 VICON 14

VICON KISS 24. 12. 2004 15

Future Studies n Converting *. c 3 d to *. yor file format. n Studying the same subject in both systems. n Writing a program for the arrangenments of files required in the conversion process. 24. 12. 2004 16

24. 12. 2004