Automated extraction of the femoral anatomical axis for determining the intramedullary rod parameters in total knee arthroplasty.
作者： S. Van Cauter , M. De Beule , A. Van Haver , P. Verdonk , B. Verhegghe
DOI: 10.1002/CNM.1478
关键词: Orientation (computer vision) 、 Anatomical axis 、 Intramedullary rod 、 Biomedical engineering 、 Femoral prosthesis 、 Femur 、 Accuracy and precision 、 Total knee arthroplasty 、 Preoperative planning 、 Computer science
摘要: SUMMARY The automated extraction of anatomical reference parameters may improve speed, precision and accuracy surgical procedures. In this study, an method for extracting the femoral axis (FAA) from a 3D surface mesh, based on geometrical entity fitting, is presented. This was applied to conventional total knee arthroplasty, which uses intramedullary rod (FIR) orient prosthesis with respect FAA. The orientation entry point FIR length 200 mm are automatically determined FAA, as it has been shown that errors in these lead malalignment mechanical axis. Moreover, effect partially scanning leg investigated by creating reduced femur models comparing results full models. Precise measurements obtained 50 using central two outer parts, lengths 20 120 mm, correspond 58% mean length. deviations were less than 2 mm 2.8 mm FAA endpoints 0.7°and 1.3 mm point. computer-based techniques might eventually be used preoperative planning arthroplasty. Copyright © 2011 John Wiley & Sons, Ltd.
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