[1] Liu Bin, Su Tieming, Ou Zongying, Zhao Dewei, et al. Prosthetic modeling for femoral head based on ellipsoid fitting [J]. Journal of Southeast University (English Edition), 2009, 25 (1): 47-51. [doi:10.3969/j.issn.1003-7985.2009.01.011]

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Prosthetic modeling for femoral head based on ellipsoid fitting()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

25

Issue:

2009 1

Page:

47-51

Research Field:

Computer Science and Engineering

Publishing date:

2009-03-30

Info

Title:

Prosthetic modeling for femoral head based on ellipsoid fitting

Author(s):

Liu Bin¹;  Su Tieming¹;  Ou Zongying¹;  Zhao Dewei²;  Wang Weiming²;  Han Jun³

¹Key Laboratory for Precision and Non-traditional Machining of Ministry of Education, Dalian University of Technology, Dalian 116024, China
²Affiliated Zhongshan Hospital, Dalian University, Dalian 116001, China
³Dalian Modern High-Tech Development Co., Ltd., Dalian 116025, China

Keywords:

femoral head;  ellipsoid;  elimination;  fitting;  modeling

PACS:

TP391

DOI:

10.3969/j.issn.1003-7985.2009.01.011

Abstract:

A novel modeling method which can restore the shape of the femoral head with collapse induced by ischemic necrosis is proposed.First, sequential tomograms of the hip are obtained from a CT scan;secondly, an accurate and automatic method is used to extract the profile of the acetabulum;thirdly, a hybrid method is utilized to gather fiducial marks on the acetabulum;fourthly, bulky error sampling points are removed. Finally, an ellipsoid fitting method is used to fit the ellipsoid model of the femoral head.Two male sufferers with different necrosis extents are chosen as experimental subjects for contrastive simulation.Fifty cases of different ages(from 25 to 79 years old)are utilized for statistical comparisons of matching errors.The prosthetic models highly resemble the primary shape of the femoral head in health.This new method provides not only a theoretical model for accurate operation position fixing in an orthopaedics clinic, but it is also an innovative practical means for the individual manufacture of artificial femoral heads.

References:

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[2] Zhao Dewei, Wang Weiming, Wang Benjie, et al.Conservative methods for osteonecrosis of the femoral head:the review of 1005 cases[J].Chinese Journal of Surgery, 2005, 43(16):1054-1057.(in Chinese)
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[7] Zoroofi R A, Sato Y, Sasama T, et al.Automated segmentation of acetabulum and femoral head from 3-D CT images[J].IEEE Transactions on Information Technology in Biomedicine, 2003, 7(4):329-343.
[8] Liu Bin, Song Weiwei, Ou Zongying, et al.Reparative modeling for femoral head based on eliminative fitting[J].Journal of Southeast University:Natural Science Edition, 2008, 38(1):58-63.(in Chinese)
[9] Fitzgibbon A W, Pilu M, Fisher R B.Direct least-square fitting of ellipses[J].IEEE Transactions on Pattern Analysis and Machine Intelligence, 1999, 21(5):476-480.
[10] Ou Zongying, Qin Xujia, Ji Fengxin, et al.Study and development of image & graphics processing software of multi-leaf collimator conformal radiotherapy system[J].Journal of Dalian University of Technology, 2001, 41(6):711-715.(in Chinese)

Memo

Memo:

Biographies: Liu Bin(1981—), male, graduate;Ou Zongying(corresponding author), male, professor, ouzyg@dlut.edu.cn.
Foundation items: The National High Technology Research and Development Program of China(863 Program)(No.863-306-ZD13-03-6), the High Technology Research and Development Program of Dalian City(No.2005E21SF134).
Citation: Liu Bin, Su Tieming, Ou Zongying, et al.Prosthetic modeling for femoral head based on ellipsoid fitting[J].Journal of Southeast University(English Edition), 2009, 25(1):47-51.

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