中国组织工程研究

中国组织工程研究 ›› 2010, Vol. 14 ›› Issue (4): 571-576.doi: 10.3969/j.issn.1673-8225.2010.04.001

• 数字化骨科 digital orthopedics •    下一篇

三维CT扫描计算机重建正常髋关节空间形态及其变化趋势

王玉琨1，徐  刚1，张建立1，张  洪2   

  1. 北京积水潭医院，1小儿骨科，2矫形骨科，北京市 100035
  • 出版日期:2010-01-22 发布日期:2010-01-22
  • 通讯作者: 张建立，主任医师，北京积水潭医院小儿骨科，北京市 100035 zhangjianli01@vip.sina.com
  • 作者简介:王玉琨，男， 1967年生，汉族，1991年北京医科大学毕业，副主任医师，主要从事儿童髋关节疾患及肢体不等长研究。 wyk9536@sina.com
  • 基金资助:

    北京市委组织部优秀人才培养专项经费资助(20051D0300204)。

Three-dimensional CT reconstruction for analysis of normal acetabular spatial contour and its curvature transformation

Wang Yu-kun1, Xu Gang1, Zhang Jian-li1, Zhang Hong2   

  1. 1 Department of Pediatric Orthopedics, 2 Department of Orthopedics, Beijing Jishuitan Hospital, Beijing   100035, China
  • Online:2010-01-22 Published:2010-01-22
  • Contact: Zhang Jian-li, Chief physician, Department of Pediatric Orthopedics, Beijing Jishuitan Hospital, Beijing 100035, China zhangjianli01@vip.sina.com
  • About author:Wang Yu-kun, Associate chief physician, Department of Pediatric Orthopedics, Beijing Jishuitan Hospital, Beijing 100035, China wyk9536@sina.com
  • Supported by:

     the Talent Scholar Training Foundation of Department of CPC Beijing Municipal Committee, No. 20051D0300204*

PDF

875

被引次数

8

摘要：

背景：研究正常髋臼空间形态以及头臼相互关系的覆盖率变化曲线，对于准确描述髋关节的空间轮廓、指导髋关节疾病尤其是髋关节发育不良的临床诊断及治疗方式选择、以及评价治疗效果，极其重要。
目的：利用正常髋关节螺旋CT扫描的三维数据，以特定及合作开发的计算机软件重建后描述正常髋关节空间形态及其变化趋势。
方法：选择6~17岁正常56个髋关节三维CT扫描数据，以特定商业软件VxWork模拟分析并表面重建髋关节之后截取髋臼和股骨头，再借助协作开发的Terrain软件生成髋臼及股骨头的等值线图形、并予以定性研究。
结果与结论：正常髋臼的等值线排列成多个同心“C”和“卵圆O”形、其中至少有一个封闭的“O”形，表示髋臼存在穹顶形态；“O”形周围的等值线稀疏，表示髋臼穹顶周围曲率小、空间形态变化平缓；而髋臼底区域等值线密集则表示该部曲率大、形状陡峭、空间形态变化显著。髋臼前、后缘等值线形成多个“V”形，连接该“V”形拐点所成的弧线与髋臼外上缘等值线平滑延续。股骨头等值线为多个同心“O”形。髋臼穹顶区与股骨头表面的中央区等值线叠合后，二者的走势及形态基本吻合，表明头臼曲面形势及空间适应性程度良好。结果提示髋臼和股骨头等值线图像，能够形象而直观立体地描述其空间形态及变化趋势。

关键词: 髋关节, 髋臼空间形态, 等值线图, 头臼适应程度, 髋关节假体

Abstract:

BACKGROUND: The determination of the normal acetabular spatial contour, the pattern of its curvature transformation, and adaptability between acetabulum and femoral head plays an important role in the description of spatial relationship of the hip joint, the management and evaluation of hip disorders, especially developmental dysplasia of the hip.
OBJECTIVE: Based on spiral three-dimensional CT data of normal hip joints, to create isoline map of each acetabulum and femoral head by a well-developed and cooperating programmed computer software so as to determine the normal acetabular spatial contour and the pattern of its curvature transformation.
METHODS: Three-dimensional CT data of 56 normal hip joints, aged from 6 to 17 years, were collected. After three-dimensional simulation and surface shade display (SSD) reconstruction by a well-developed VxWork software, the isoline map was created using contours map in Geomorphology, and each isoline map of the normal acetabulum and femoral head was analyzed via a specific computer software (Terrain).
RESULTS AND CONCLUSION: The isoline array of normal acetabulum revealed the modality of some concentric “C” or oval “O”, with at least one close “O” at the central zone, indicating that there existed dome shape at the superior zone of acetabulum. The modality of sparse isolines around dome illustrated larger curvature radius and more slowgoing change of spatial contour transformation of this zone, while the dense isolines on the bottom zone of acetabulum represented a small curvature radius, steep shape, and rapid changing profile of this zone. The isoline array of normal femoral head was multiple concentric “O” with different space between each line. The congruence isolines of acetabular dome and superior surface of femoral head emerged as the similar trend of geomorphological characteristics, revealing that both the spatial contour and the curvature pattern between acetabulum and femoral head are well-adaptable to each other. Results show that the isolines of acetabulum and femoral head can stereoscopicly visualize the spatial contour and curvature pattern of the topographic surface of the hip joint.

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