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[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()
基于椭球面拟合的股骨头修复建模

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
基于椭球面拟合的股骨头修复建模
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
刘斌1, 苏铁明1, 欧宗瑛1, 赵德伟2, 王卫明2, 韩军3
1大连理工大学精密与特种加工教育部重点实验室, 大连 116024; 2大连大学附属中山医院, 大连 116001; 3大连现代高技术发展有限公司, 大连 116025
Keywords:
femoral head;  ellipsoid;  elimination;  fitting;  modeling
股骨头;  椭球面;  剔除;  拟合;  建模
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.
提出了一种可以获得目标病例健康时股骨头模型的新建模方法.首先利用一种精确的自动分割方法在髋骨部位CT序列图像中提取髋臼轮廓;然后使用基于等距栅格采样法与辐条式采样法相结合的混合采样法得到髋臼凹面的空间坐标点集, 并剔除其中的误差采样点;最后采用基于二次曲面一般方程的方法拟合原始股骨头椭球面模型.通过对2例不同坏死程度的男性患者进行修复性的对比仿真, 以及对50例不同年龄(25~79岁)患者修复重建后的匹配误差统计分析, 证明此方法可以良好地还原坏死的股骨头模型, 既为骨科临床中的精确手术定位提供了理论模型, 又为针对个体化制造的人工假体生产提供了新的实践方法.

References:

[1] Sharma N, Meyer D.Design of a dimpled femoral head in total hip replacements using elastohydrodynamic lubrication theory[C]//Proceedings of the IEEE 31st Annual Northeast on Bioengineering.Hoboken, NJ, USA, 2005:92-93.
[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)
[3] Sarry L, Tilmant C, Boisgard S, et al.Monitoring of polyethylene wear in nonmetal-backed acetubular cups by digitized anteroposterior pelvic radiography[J].IEEE Transactions on Medical Imaging, 2003, 22(9):1172-1182.
[4] Kim J S, Kim S I.A new measurement method of femoral anteversion based on the 3D modeling[C]//Proceedings of the 19th Annual International Conference of the IEEE on Engineering in Medicine and Biology Society.Chicago, USA, 1997, 1:418-421.
[5] Bassounas A, Fotiadis D I, Malizos K N.Evaluation of femoral head necrosis using a volumetric method based on MRI[C]//Proceedings of the 23rd Annual International Conference of the IEEE on Engineering in Medicine and Biology Society.Istanbul, Turkey, 2001, 2:1532-1535.
[6] Baruffaldi F, Bettuzzi M, Bianconi D, et al.An innovative CCD-based high-resolution CT system for analysis of trabecular bone tissue[J].IEEE Transactions on Nuclear Science, 2006, 53(5):2584-2590.
[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.
Last Update: 2009-03-20