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A Segmentation Framework of Pulmonary Nodules in Lung CT Images

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An Erratum to this article was published on 04 August 2015

Abstract

Accurate segmentation of pulmonary nodules is a prerequisite for acceptable performance of computer-aided detection (CAD) system designed for diagnosis of lung cancer from lung CT images. Accurate segmentation helps to improve the quality of machine level features which could improve the performance of the CAD system. The well-circumscribed solid nodules can be segmented using thresholding, but segmentation becomes difficult for part-solid, non-solid, and solid nodules attached with pleura or vessels. We proposed a segmentation framework for all types of pulmonary nodules based on internal texture (solid/part-solid and non-solid) and external attachment (juxta-pleural and juxta-vascular). In the proposed framework, first pulmonary nodules are categorized into solid/part-solid and non-solid category by analyzing intensity distribution in the core of the nodule. Two separate segmentation methods are developed for solid/part-solid and non-solid nodules, respectively. After determining the category of nodule, the particular algorithm is set to remove attached pleural surface and vessels from the nodule body. The result of segmentation is evaluated in terms of four contour-based metrics and six region-based metrics for 891 pulmonary nodules from Lung Image Database Consortium and Image Database Resource Initiative (LIDC/IDRI) public database. The experimental result shows that the proposed segmentation framework is reliable for segmentation of various types of pulmonary nodules with improved accuracy compared to existing segmentation methods.

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Acknowledgments

This study was funded by Department of Electronics and Information Technology, Government of India, Grant number 1(3)2009-ME &TMD and 1(2)/2013-ME & TMD/ESDA, respectively.

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  1. Indian Institute of Technology Kharagpur, Kharagpur, India

    Sudipta Mukhopadhyay

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  1. Sudipta Mukhopadhyay
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Correspondence to Sudipta Mukhopadhyay.

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Mukhopadhyay, S. A Segmentation Framework of Pulmonary Nodules in Lung CT Images. J Digit Imaging 29, 86–103 (2016). https://doi.org/10.1007/s10278-015-9801-9

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  • DOI: https://doi.org/10.1007/s10278-015-9801-9

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