Computed Tomography Reconstruction from Hollow Projections: An Application to In Vivo Evaluation of Artificial Hip Joints
Computed Tomography Reconstruction from Hollow Projections: An Application to In Vivo Evaluation of Artificial Hip Joints
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DOI：
10.1097/00004728-197902000-00009
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发表时间：
1979-02
影响因子：
1.3
通讯作者：
T. Hinderling;P. Rüegsegger;M. Anliker;C. Dietschi
中科院分区：
文献类型：
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作者：
T. Hinderling;P. Rüegsegger;M. Anliker;C. Dietschi
全髋关节置换术的长期机械稳定性限制了这种广泛使用的外科手术在严重髋关节炎病例中的应用。需要一种非侵入性方法来评估种植体-骨界面附近的组织分布，以识别种植体松动的早期迹象并评估新的修复解决方案。为了开发这种方法，设计了一种改进的计算机断层扫描技术，可以产生横截面图像，而不会出现由金属植入物引起的常见伪影。该技术提供有关骨矿物质和骨水泥分布以及股骨干内植入物的精确位置和方向的信息。从切除的人类股骨获得的结果和术后 3 个月对患者进行的测量的初步数据表明，骨水泥的分布比射线照片显示的要差得多。
The long-term mechanical stability of total hip arthroplasties limits the application of this widely used surgical procedure in cases of severe coxarthroses. A noninvasive method of assessing the tissue distribution in the vicinity of the implant-bone interface is needed to identify early signs of implant loosening and to evaluate new prosthetic solutions. In order to develop such a method, a modified computed tomography technique has been devised that yields cross-sectional images without the usual artifacts caused by metallic implants. This technique provides information on bone mineral and bone cement distributions as well as on the precise position and orientation of the implant within the femur shaft. Results obtained from excised human femurs and preliminary data from measurements on patients made 3 months postoperatively reveal that the bone cement distribution is much less favorable than is indicated by radiographs.