中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (11): 1764-1769.doi: 10.3969/j.issn.2095-4344.2017.11.022

• 骨与关节图像与影像 bone and joint imaging • 上一篇    下一篇

CT三维重建分析不同体位下股骨侧弓对下肢力线测量的影响

吴 伟1,2,郭万首1,2,李传东3,刘朝晖2,张启栋2,程立明2   

  1. 1北京协和医学院研究生院,北京市 100730;中日友好医院,2骨关节外科,3放射诊断科,北京市 100029
  • 出版日期:2017-04-18 发布日期:2017-05-06
  • 通讯作者: 郭万首,博士,教授,主任医师,北京协和医学院研究生院,北京市100730;中日友好医院骨关节外科,北京市 100029
  • 作者简介:吴伟,男,1979年生,河北省廊坊市人,汉族,副主任医师,北京协和医学院在读博士,主要从事骨关节外科方面的研究。
  • 基金资助:

    首都卫生发展科研专项项目(2016-2-4062)

Effect of femoral bowing angle on the lower limb alignment in different positions based on CT three-dimensional reconstruction  

Wu Wei1, 2, Guo Wan-shou1, 2, Li Chuan-dong3, Liu Zhao-hui2, Zhang Qi-dong2, Cheng Li-ming2   

  1. 1Graduate School of Peking Union Medical College, Beijing 100730, China; 2Department of Bone and Joint Surgery, 3Department of Radiology, China-Japan Friendship Hospital, Beijing 100029, China
  • Online:2017-04-18 Published:2017-05-06
  • Contact: Guo Wan-shou, M.D., Professor, Chief physician, Graduate School of Peking Union Medical College, Beijing 100730, China; Department of Bone and Joint Surgery, China-Japan Friendship Hospital, Beijing 100029, China
  • About author:Wu Wei, Studying for doctorate, Associate chief physician, Graduate School of Peking Union Medical College, Beijing 100730, China; Department of Bone and Joint Surgery, China-Japan Friendship Hospital, Beijing 100029, China
  • Supported by:

    the Capital Special Research Project of Health Development, No. 2016-2-4062

摘要:

文章快速阅读: 

文题释义:
CT血管造影:是将CT增强技术与薄层、大范围、快速扫描技术相结合,通过合理的后处理,清晰显示全身各部位血管细节,具有无创和操作简便的特点,对于血管变异、血管疾病以及显示病变和血管关系有重要价值。
下肢力线:即股骨机械轴与胫骨机械轴的夹角,理想的角度为0°-5°,中国人参考值为:男性(2.2±2.7)°,女性(2.2±2.5)°。股骨机械轴为股骨头圆心与股骨髁间窝顶点的连线,胫骨机械轴为胫骨髁间嵴中点与踝关节中心的连线, 踝关节中心取内外踝的中点。
 
摘要
背景:下肢力线的测量结果经常受到多种因素的影响而出现偏差,不同体位下股骨侧弓角可影响下肢力线的测量。
目的:通过CT扫描数据重建下肢骨骼模型,模拟下肢全长X射线检查,测量该模型在不同的旋转角度下的股骨侧弓角及股骨外翻角等数值,并探讨股骨侧弓对下肢力线测量的影响规律。
方法:纳入进行下肢动脉CT血管造影的患者20例,Mimics 13.0软件对各病例CT扫描数据重建出该肢体骨骼的三维立体模型,确认其标准正位股骨侧弓角,分为4组:股骨侧弓角> 2°组,股骨侧弓角大于0°,< 2°组,股骨侧弓角> -2°小于0°组,股骨侧弓角< -2°组,每组5例。利用软件功能使其沿下肢纵轴以2°步幅精确旋转出自内旋20°至外旋20°的21个图像,由所得图像测量不同体位下的股骨侧弓角及股骨外翻角,以模拟下肢全长X射线检查下肢伴有旋转的情况。
结果与结论:①股骨侧弓角的变化规律显示,下肢内旋使股骨侧弓角呈减小趋势,下肢外旋使股骨侧弓角加大趋势;②股骨外翻角随肢体外旋有逐渐增大的趋势,而随肢体内旋有逐渐减小的趋势;③各组不同体位下的股骨侧弓与股骨外翻角均呈显著正相关(P < 0.01);④结果显示:采用CT扫描数据重建下肢骨骼模型模拟下肢全长X射线检查可见,股骨侧弓角测量结果会随肢体旋转发生变化,且会对股骨外翻角的测量结果产生影响,侧弓程度越大,由此产生的影响越大,所以拍摄下肢正位全长X射线片时应采用标准正位为投照体位,尤其对于股骨侧弓较大的病例。
 
中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程
ORCID: 0000-0001-7910-2664(吴伟)

关键词: 骨科植入物, 骨植入物, 数字化骨科, 骨关节图像与影像, 三维重建, 股骨侧弓, 力线, 下肢, 体位, 股骨外翻角, 股骨侧弓角, 骨骼, 立体模型, 髋-膝-踝角

Abstract:

BACKGROUND: Measuring result of the lower limb alignment is often influenced by various factors, such as femoral bowing angle (FBA) in different positions.

OBJECTIVE: To measure the FBA and femoral valgus correction angle (VCA) in different positions after CT reconstruction of lower limb model, and simulating X-ray examination, and to explore the rule of FBA affecting lower limb alignment.
METHODS: Twenty patients undergoing CT angiography of lower extremity artery were enrolled, three-dimensional reconstruction of low limb was established on Mimics13.0 software based on CT data, and the FBA in standard posture was determined. All patients were divided into groups A (FBA > 2°), B (2° > FBA > 0°), C (0° > FBA > -2°) and D (FBA < -2°) (n=5 per group). Then each model was revolved through the vertical axis from 20° of internal rotation to 20° of external rotation by 2° for one motion, and 21 three-dimensional images were transformed into two-dimensional images to obtain the X-ray images of low limb. FBA and VCA in different positions were measured.
RESULTS AND CONCLUSION: (1) The outcome measurements showed that FBA tended to be decreased in internal rotation and increased in external rotation. (2) VCA tended to be increased in external rotation and decreased in internal rotation. (3) FBA was positively correlated with VCA in the different positions (P < 0.01). (4) These results suggest that FBA can be altered with rotation and even expose influence on VCA. The bigger FBA is, the more influence on the lower limb alignment. Therefore, it is advisable to conduct the full length X-ray of lower limb in a standard posture, especially for the patients with larger FBA.   

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程

Key words: Tissue Engineering, Femur, Knee Joint

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