...
首页> 外文期刊>Journal of Biomechanics >EBRA - A METHOD TO MEASURE MIGRATION OF ACETABULAR COMPONENTS
【24h】

EBRA - A METHOD TO MEASURE MIGRATION OF ACETABULAR COMPONENTS

机译:EBRA-一种测量髋臼组件迁移的方法

获取原文
获取原文并翻译 | 示例
           

摘要

In orthopedics there is a demand for determining migration of hip sockets by evaluation of standard radiographs. In this case problems are caused mainly by changing pelvis positions on the X-ray table at successive exposures. A method (EBRA) is described that evaluates standard AP radiographs without requiring additional means at exposure (e.g, ball markers). Simulating the spatial situation it computes parameters of longitudinal and transverse migration of prosthetic cup and femoral head. A comparability algorithm using a grid of transverse and longitudinal tangents of the pelvis contour divides serial radiographs into sets of comparable ones. Comparability of serial radiographs takes place if the distances of corresponding grid lines do not transcend a given limit L. Migration is measured only between comparable radiographs. Different studies are described concerning the interdependence of pelvis rotations and changes of the grid lines, the degree of pelvis rotations appearing in practice, the choice of the limit L, the properties of the comparability algorithm and the accuracy of EBRA. The 95% confidence limits for EBRA results are 1.0 mm for longitudinal and 0.8 mm for transverse migration. [References: 17]
机译:在骨科中,需要通过评估标准射线照相来确定髋臼的移位。在这种情况下,问题主要是由于在连续曝光时改变X射线检查台上的骨盆位置而引起的。描述了一种方法(EBRA),该方法可评估标准的AP射线照相,而无需在曝光时使用其他手段(例如,球形标记)。模拟空间情况,它计算假体杯和股骨头的纵向和横向迁移参数。使用骨盆轮廓的横向和纵向切线的网格的可比性算法将系列X射线照片分成几组可比较的X射线照片。如果相应的网格线的距离不超过给定的极限L,则会发生连续射线照相的可比性。仅在可比较的射线照相之间测量迁移。关于骨盆旋转和网格线变化的相互依赖性,实际中出现的骨盆旋转程度,极限L的选择,可比性算法的性质以及EBRA的准确性,描述了不同的研究。 EBRA结果的95%置信限为纵向移动1.0毫米,横向移动0.8毫米。 [参考:17]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号