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KMID : 1151820130070050313
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Journal of the Korean Society of Radiology
2013 Volume.7 No. 5 p.313 ~ p.320
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Three Dimensional Curvature Analysis of Femoral Shaft Bowing based on CT Images
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Lim Ki-Seon
Oh Wang-Kyun
Lee Tae-Su
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Abstract
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For some patients with joint illnesses such as rheumarthritis or varus deformity, the total knee arthroplasty (TKA) procedures are performed. However, when inserting metal cutting guide for the procedures, due to the femoral shaft bowing, complications such as the cortex of the femoral shaft damages or secondary fractures can be caused. If the central coordinate value of the femoral shaft is known, the metal cutting guide could be inserted into the anatomical center, so such complications can be prevented. In this study, CT images of femoral shafts of 10 individuals in the experiment group who are in need of receiving the total knee arthroplasty procedures and those of 10 individuals in the control group without illness in the femoral shaft have been utilized to locate the 3-dimensional coordinate values. Then, Matlab was utilized to identify the central coordinate value in order to obtain a graph reflecting the anatomical shapes as well as to acquire the 3-dimensional radial curvature values by section. As a result, the average curvature range and standard deviation of femoral shafts of the experiment group was determined to be 758.15±206.3 mm whereas the that of the control group was determined to be 1672.97±395.6 mm. The statistical significance of the measured results was verified through f-distribution analysis. Based on these results, it was verified that the level of curvature of the femoral shaft of the experiment group was higher. If the anatomical central points are located and analyzed using this methodology, it would be helpful in performing orthopedic operations such as the total knee arthroplasty.
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KEYWORD
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Total Knee Arthroplasty, Femoral shaft bowing, Osirix Dicom Viewer, Curvature, Computed Tomography
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