Segmentation of Lung Lobes and Nodules in CT Images

The objective of this paper is to develop a segmentation system in order to assist the surgeons to remove the portion of lung for the treatment of certain illness such as lung cancer, and tumours. The fissures of lung lobes are not seen by naked eyes in low dose CT image, there is a proposal for automatic segmentation system. The lung lobes and nodules in CT image are segmented using two stage approaches such as modified adaptive fissure sweep and adaptive thresholding. Initially pre-processing is used to remove the noise present in CT image using filter, then the fissure regions are located using adaptive fissure sweep technique, then histogram equalization and region growing is applied to refine the oblique fissure. Lung Nodules are segmented using thresholding. The comparative analysis of manual and automatic segmentation for fissure verification has been performed statistically. The analysis is made on 20 set of images