Journal of Northeastern University Natural Science ›› 2018, Vol. 39 ›› Issue (2): 190-194.DOI: 10.12068/j.issn.1005-3026.2018.02.009

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Quantitative and Intelligent Diagnosis Method of Hip Dislocation Based on 3D-CT Images

LI Hong1, SUN Hang1, LIU Sheng-nan1, PAN Shi-nong2   

  1. 1. School of Sino-Dutch Biomedical and Information Engineering, Northeastern University, Shenyang 110169, China; 2. Department of Radiology, Shengjing Hospital of China Medical University, Shenyang 110004, China.
  • Received:2017-03-30 Revised:2017-03-30 Online:2018-02-15 Published:2018-02-09
  • Contact: LI Hong
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Abstract: Considering that the spherical surface of the femoral head should be approximately concentric with that of the acetabulum, an effective method based on three dimensional image segmentation and spherical surface fitting was proposed, with some detailed algorithm designed. First, the three dimensional segmentation was implemented on the femur and acetabulum to obtain respective independent data. After extracting the valid data of the femoral head and acetabulum boundary and removing the error points, the least square method was applied to fit the spherical surface of the femoral head and the surface of the acetabulum. Then the respective sphere center distance between two spherical surfaces was calculated, thus determining whether the acetabulum is dislocated or not. The results of experiments show that the method proposed can provide the distance for hip replacement and improve the diagnostic accuracy.

Key words: hip dislocation, computer aided diagnosis(CAD), 3D-CT image segmentation, spherical fitting

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