An automatic approach to lung region segmentation in chest x-ray images using adapted U-Net architecture

Md Fashiar Rahman; Tzu-Liang (Bill) Tseng; Michael Pokojovy; Wei Qian; Basavarajaiah Totada; Honglun Xu

doi:10.1117/12.2581882

15 February 2021 An automatic approach to lung region segmentation in chest x-ray images using adapted U-Net architecture

Md Fashiar Rahman, Tzu-Liang (Bill) Tseng, Michael Pokojovy, Wei Qian, Basavarajaiah Totada, Honglun Xu

Author Affiliations +

Proceedings Volume 11595, Medical Imaging 2021: Physics of Medical Imaging; 115953I (2021) https://doi.org/10.1117/12.2581882
Event: SPIE Medical Imaging, 2021, Online Only

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Abstract

Segmentation of the lung field is considered as the first and crucial stage in diagnosis of pulmonary diseases. In clinical practice, computer-aided systems are used to segment the lung region from chest X-ray (CXR) or CT images. The task of segmentation is challenging due to the presence of opacities or consolidation in CXR, which are typically produced by overlaps between the lung region and intense abnormalities caused by pulmonary diseases such as pneumonia, tuberculosis, or COVID-19. Recently, Convolution Neural Networks (CNNs) have been shown promising for segmentation and detection in digital images. In this paper, we propose a two-stage framework based on adapted U-Net architecture to leverage automatic lung segmentation. In the first stage, we extract CXR-patches and train a modified U-Net architecture to generate an initial segmentation of lung field. The second stage is the post-processing step, where we deploy image processing techniques to obtain a clear final segmentation. The performance of the proposed method is evaluated on a set of 138 CXR images obtained from Montgomery County’s Tuberculosis Control Program, producing an average Dice Coefficient (DC) of 94.21%, and an average Intersection-Over-Union (IoU) of 91.37%.

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Md Fashiar Rahman, Tzu-Liang (Bill) Tseng, Michael Pokojovy, Wei Qian, Basavarajaiah Totada, and Honglun Xu "An automatic approach to lung region segmentation in chest x-ray images using adapted U-Net architecture", Proc. SPIE 11595, Medical Imaging 2021: Physics of Medical Imaging, 115953I (15 February 2021); https://doi.org/10.1117/12.2581882

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