Journal
COMPUTERS IN BIOLOGY AND MEDICINE
Volume 38, Issue 8, Pages 845-857Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compbiomed.2008.04.012
Keywords
lung segmentation; lung smoothing; contour tracing; curvature calculation; CT; pleural nodule; pulmonary vessels; airways
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Funding
- National Research Foundation of Korea [R01-2006-000-11244-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We propose a new curvature-based method for correcting the segmented lung boundary. Our method consists of the following steps. First, the kings are extracted from chest CT images by the automatic segmentation method. Second, the segmented lung contours are corrected by lung smoothing in each axial slice. Our scan line search provides an efficient contour tracing and curvature calculation. Finally, the smoothed lung contours are corrected by 3D VOI refinement. This increases the smoothness in the z-axis without distortion of the lung boundary. Experimental results show that our method effectively incorporates the pleural nodules and pulmonary vessels into the segmentation results. (C) 2008 Published by Elsevier Ltd.
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