Chinese Journal of Tissue Engineering Research ›› 2010, Vol. 14 ›› Issue (26): 4764-4769.doi: 10.3969/j.issn.1673-8225.2010.26.004

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Fast image segmentation and animation creating algorithms of talus based on Matlab

Dai Hong1, Yang Yun-feng2   

  1. 1School of Electronic and Electrical Engineering, Shanghai Second Polytechnic University, Shanghai  201209, China;
    2Department of Orthopedics, Tongji Hospital Affiliated to Tongji University, Shanghai  200065, China
  • Online:2010-06-25 Published:2010-06-25
  • About author:Dai Hong, Studying for doctorate, Lecturer, School of Electronic and Electrical Engineering, Shanghai Second Polytechnic University, Shanghai 201209, China daihong419@ 163.com
  • Supported by:

    the Key Subject Program of Education Committee of Shanghai City, No. J51801*;
    the Foundation of Shanghai Second Polytechnic University, No. xQD208002*

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Abstract:

BACKGROUND: Orthopedic navigation uses the computer and machine vision technology, enables physicians to complete bone surgery under the guidance of computer screen. For subsequent localization work, first of all the lower limb bones must be segmented, 3D reconstructed and shown by animation based on the CT image sequence, and its position and orientation are measured.
OBJECTIVE: To implement talus image segmentation, 3D visualization and generate its animation automatically on the computer, and to build a computer display platform for a new type of navigation system foot surgery.
METHODS: The following Algorithms are proposed and realized by Matlab programming based on a CT image series of foot: ① Foot bone images are segmented by a threshold method based on the principle of maximum entropy to obtain foot skeleton. ②The talus is quickly and automatically segmented by a morphological method combined with Live-wire algorithm from the foot bone images. ③The three dimensional surface of talus is constructed using Marching Cubes method. ④A rotated animation of the talus is created and displayed by graphical functions of Matlab.
RESULTS AND CONCLUSION: Results have shown that the proposed algorithms quickly and accurately realized the three-dimensional visualization of talus on common personal computer and can be applied in computer display platform of foot surgery navigation system.

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