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The 3D data can be extracted by measuring healthy hip joint, which is the basis of making proper artificial hip conform to right physiological characteristics. In this paper, firstly, we use adaptive windows directed by neighbouring CT slices for reducing ranges of searching. Secondly, a method based on 2D contour characteristic points matching in multilayer is proposed to effectively correct contours. Thirdly, according to complexity in the primary contours, location and fitting quasi-circular contours femur head with circle are used to adjust contours of femur head . Finally, a projecting method based on distance transform has been used for locating key points of hip joint such as intersection of head and neck, which meets anatomy features, can obtain effective and efficient 3D data. In fact, experiment in this paper shows that the method in paper can accurately extract 3D data on proximal femur in CT Series Images |
