Automatic tracking measurement system on human lumbar vertebral motion

  • Authors:

  • Yingyao Zhang;Xiaobo Xie;Hongyan Cui;Yong Hu;Fuge Sui;Lifeng Zhao;Dongjun Wang

  • Affiliations:

  • Institute of Biomedical Engineering, Perking Union Medical College & Chinese Academy of Medical Sciences, Tianjin, China;Institute of Biomedical Engineering, Perking Union Medical College & Chinese Academy of Medical Sciences, Tianjin, China;Institute of Biomedical Engineering, Perking Union Medical College & Chinese Academy of Medical Sciences, Tianjin, China;Institute of Biomedical Engineering, Perking Union Medical College & Chinese Academy of Medical Sciences, Tianjin, China;Dept. of Orthopaedic Surgery Longnan Hospital Daqing, Helongjiang, P.R. China;Dept. of Orthopaedic Surgery Longnan Hospital Daqing, Helongjiang, P.R. China;Dept. of Orthopaedic Surgery Longnan Hospital Daqing, Helongjiang, P.R. China

  • Venue:
  • VECIMS'09 Proceedings of the 2009 IEEE international conference on Virtual Environments, Human-Computer Interfaces and Measurement Systems
  • Year:
  • 2009

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Abstract

An automated tracking system was developed to measure the flexion-extension motion of lumbar vertebrae using the algorithm of Sequential Important Resampling Particle Filter. In vitro validity was performed in 10 samples under digitized video fluoroscopy. Each sample was taken 2 full flexion-extension cycles under a special guide device in fixed speed, while the calibration model of lumbar vertebrae was fixed on a metal base. The trajectories are recorded by real-time depiction of the vertebral body with rigid fixation pens when the digitized video fluoroscopy collection is finished. A special system that can perform automatic tracking on the motion of lumbar vertebrae was developed. Reliability of the measurement was evaluated by a saw bone model experiment. In comparing with real-time motion recording, the correlation coefficient of test-retest and the accuracy were calculated, which showed satisfactory stability and consistency. The results suggested this new developed automatic tracking system could be a reliable tool to monitor the dynamic lumbar motion; to analyze the translation and rotational angle of vertebral from video-fluoroscopic images automatically and accurately. The proposed system may have a potential value in the evaluation of spinal medical application.