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Three-dimensional CT based Quantitative Assessment of Normal and Dysplasia Acetabulum  

An, Eun-Soo (Department of Orthopedic Surgery, Korea University College of Medicine)
Lee, Soon-Hyuck (Department of Orthopedic Surgery, Korea University College of Medicine)
Park, Sang-Won (Department of Orthopedic Surgery, Korea University College of Medicine)
Park, Jong-Hoon (Department of Orthopedic Surgery, Korea University College of Medicine)
Suh, Dong-Hun (Department of Orthopedic Surgery, Korea University College of Medicine)
Noh, Won (Department of Orthopedic Surgery, Korea University College of Medicine)
Publication Information
Journal of the Korean Society for Precision Engineering / v.26, no.8, 2009 , pp. 126-131 More about this Journal
Abstract
Acetabular dysplasia is a condition defined by inadequate development of an individual's acetabulum. Individual diversity of the symptoms in this disease needs safe and accurate preoperative planning. Technologies that utilize multidimensional image information are thus important. The assessment method by Janzen et al. was suggested a coefficient method in evaluation of acetabular dysplasia. In this study, we applied it, using a three-dimensional computed tomography (3D CT) on the koreans. 19 cases of the normal hips and 4 cases of the acetabular dysplasia were investigated to evaluate the proved method; 3D CT was used to define the geometric center of the femoral head and to measure center edge angles at $10^{\circ}$ rotational increments around the acetabular rim. Mean and standard deviation in CEAs (Center Edge Angle) of normal 19 hips at $10^{\circ}$ rotational increments from anterior to posterior rim were determined, and termed as a 'normal curve'. Then this normal values were compared with the CEA data measured from 4 cases of acetabular dysplasia patiens. Quantative comparison of the CEA values between the normal cases and dysplasia cases was successfully demonstrated, and thus, we claim that this simple CT method of assessing acetabular dysplasia can be well applicable to diagnosis, quantification and surgical planning for adult acetabular dysplasia patients.
Keywords
Acetabular Dysplasia; Center Edge Angle; Three-dimensional Computed Tomography;
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