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BioMed Research International
Volume 2016, Article ID 5967580, 6 pages
Research Article

Automatic Detection of Pectoral Muscle Region for Computer-Aided Diagnosis Using MIAS Mammograms

1Biomedical Engineering Branch, Division of Convergence Technology, National Cancer Center, Goyang, Republic of Korea
2Department of Radiology, College of Medicine, Ulsan University, Seoul, Republic of Korea
3Electronics and Telecommunications Research Institute, Daejeon, Republic of Korea

Received 2 June 2016; Revised 17 August 2016; Accepted 27 September 2016

Academic Editor: Cristiana Corsi

Copyright © 2016 Woong Bae Yoon et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The computer-aided detection (CAD) systems have been developed to help radiologists with the early detection of breast cancer. This system provides objective and accurate information to reduce the misdiagnosis of the disease. In mammography, the pectoral muscle region is used as an index to compare the symmetry between the left and right images in the mediolateral oblique (MLO) view. The pectoral muscle segmentation is necessary for the detection of microcalcification or mass because the pectoral muscle has a similar pixel intensity as that of lesions, which affects the results of automatic detection. In this study, the mammographic image analysis society database (MIAS, 322 cases) was used for detecting the pectoral muscle segmentation. The pectoral muscle was detected by using the morphological method and the random sample consensus (RANSAC) algorithm. We evaluated the detected pectoral muscle region and compared the manual segmentation with the automatic segmentation. The results showed 92.2% accuracy. We expect that the proposed method improves the detection accuracy of breast cancer lesions using a CAD system.