title: A Method for Lung Boundary Correction Using Split Bregman Method and Geometric Active Contour Model.
abstract: In order to get the extracted lung region from CT images more accurately, a model that contains lung region extraction and edge boundary correction is proposed. Firstly, a new edge detection function is presented with the help of the classic structure tensor theory. Secondly, the initial lung mask is automatically extracted by an improved active contour model which combines the global intensity information, local intensity information, the new edge information, and an adaptive weight. It is worth noting that the objective function of the improved model is converted to a convex model, which makes the proposed model get the global minimum. Then, the central airway was excluded according to the spatial context messages and the position relationship between every segmented region and the rib. Thirdly, a mesh and the fractal theory are used to detect the boundary that surrounds the juxtapleural nodule. Finally, the geometric active contour model is employed to correct the detected boundary and reinclude juxtapleural nodules. We also evaluated the performance of the proposed segmentation and correction model by comparing with their popular counterparts. Efficient computing capability and robustness property prove that our model can correct the lung boundary reliably and reproducibly.
authors.affiliation: Department of Information Science and Technology, Taishan University, Taian 271021, China ; Tianjin Key Laboratory of Intelligent Robotics, Institute of Robotics and Automatic Information System, College of Computer and Control Engineering, Nankai University, No. 94 Weijin Road, Tianjin 300071, China.
authors.forename: Changli
authors.identifier: 0000-0002-5435-9559
authors.initials: C
authors.lastname: Feng
authors.affiliation: Tianjin Key Laboratory of Intelligent Robotics, Institute of Robotics and Automatic Information System, College of Computer and Control Engineering, Nankai University, No. 94 Weijin Road, Tianjin 300071, China.
authors.forename: Jianxun
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Tianjin Key Laboratory of Intelligent Robotics, Institute of Robotics and Automatic Information System, College of Computer and Control Engineering, Nankai University, No. 94 Weijin Road, Tianjin 300071, China.
authors.forename: Rui
authors.initials: R
authors.lastname: Liang
mesh_terms: D000465:Algorithms; D019295:Computational Biology; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods / Q000706:statistics & numerical data; D008168:Lung / Q000000981:diagnostic imaging*; D008953:Models, Anatomic; D015233:Models, Statistical; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D014057:Tomography, X-Ray Computed / Q000706:statistics & numerical data*