文章基本信息

标题：Automatic Extraction of Femur Contours from Calibrated X-Ray Images using Statistical Information
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作者：Dong, Xiao ; Ballester, Miguel A. Gonzalez ; Zheng, Guoyan 等
期刊名称：Journal of Multimedia
印刷版ISSN：1796-2048
出版年度：2007
卷号：2
期号：5
页码：46-54
DOI：10.4304/jmm.2.5.46-54
语种：English
出版社：Academy Publisher
摘要：Automatic identification and extraction of bone contours from x-ray images is an essential first step task for further medical image analysis. In this paper we propose a 3D statistical model based framework for the proximal femur contour extraction from calibrated x-ray images. The automatic initialization to align the 3D model with the x-ray images is solved by an Estimation of Bayesian Network Algorithm to fit a simplified multiple component geometrical model of the proximal femur to the x-ray data. Landmarks can be extracted from the geometrical model for the initialization of the 3D statistical model. The contour extraction is then accomplished by a joint registration and segmentation procedure. We iteratively updates the extracted bone contours and an instanced 3D model to fit the x-ray images. Taking the projected silhouettes of the instanced 3D model on the registered x-ray images as templates, bone contours can be extracted by a graphical model based Bayesian inference. The 3D model can then be updated by a non-rigid 2D/3D registration between the 3D statistical model and the extracted bone contours. Preliminary experiments on clinical data sets verified its validity.
关键词：contour extraction; statistical model; Bayesian network; 2D/3D registration; segmentation; calibrated x-ray image