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Issue No.01 - January (2011 vol.17)
pp: 115-124
Jiantao Pu , University of Pittsburgh, Pittsburgh, PA
David S. Paik , Stanford University, Stanford, CA
Xin Meng , University of Pittsburgh, Pittsburgh, PA
Justus E. Roos , Stanford University, Stanford, CA
Geoffrey D. Rubin , Stanford University, Stanford, CA
ABSTRACT
In three-dimensional medical imaging, segmentation of specific anatomy structure is often a preprocessing step for computer-aided detection/diagnosis (CAD) purposes, and its performance has a significant impact on diagnosis of diseases as well as objective quantitative assessment of therapeutic efficacy. However, the existence of various diseases, image noise or artifacts, and individual anatomical variety generally impose a challenge for accurate segmentation of specific structures. To address these problems, a shape analysis strategy termed “break-and-repair” is presented in this study to facilitate automated medical image segmentation. Similar to surface approximation using a limited number of control points, the basic idea is to remove problematic regions and then estimate a smooth and complete surface shape by representing the remaining regions with high fidelity as an implicit function. The innovation of this shape analysis strategy is the capability of solving challenging medical image segmentation problems in a unified framework, regardless of the variability of anatomical structures in question. In our implementation, principal curvature analysis is used to identify and remove the problematic regions and radial basis function (RBF) based implicit surface fitting is used to achieve a closed (or complete) surface boundary. The feasibility and performance of this strategy are demonstrated by applying it to automated segmentation of two completely different anatomical structures depicted on CT examinations, namely human lungs and pulmonary nodules. Our quantitative experiments on a large number of clinical CT examinations collected from different sources demonstrate the accuracy, robustness, and generality of the shape “break-and-repair” strategy in medical image segmentation.
INDEX TERMS
Shape analysis, surface interpolation, medical image segmentation, computer-aided detection/diagnosis.
CITATION
Jiantao Pu, David S. Paik, Xin Meng, Justus E. Roos, Geoffrey D. Rubin, "Shape “Break-and-Repair” Strategy and Its Application to Automated Medical Image Segmentation", IEEE Transactions on Visualization & Computer Graphics, vol.17, no. 1, pp. 115-124, January 2011, doi:10.1109/TVCG.2010.56
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