AUTOMATIC SEGMENTATION SYSTEM AND THE METHOD OF GROUND-GLASS OPACITY NODULE IN CHEST CT IMAGES

摘要

The present invention relates to an automatic segmentation system for a ground-glass opacity (GGO) nodule in chest computed tomographic (CT) images and a segmentation method thereof, which simultaneously separating a GGO nodule component and a solid component from a background using multi-phase deformable model with intensity constraints. The automatic segmentation system for the GGO nodule in chest CT images comprises: an initial segmentation unit which segments initial GGO and solid components in the chest CT images by estimating adaptive threshold values using intensity histogram modeling; a neighbor structure elimination unit which eliminates blood vessels and a chest wall around the nodule from the initial segments using shape information and segmented lung information; and a final segmentation unit which segments final GGO and solid components using multi-phase deformable model with intensity constraints.