A Hierarchical Classification Method for Breast Tumor Detection

Mohammadpoor, Mojtaba and Shoeibi, Afshin and zare, Hoda and Shojaee, Hasan (2016) A Hierarchical Classification Method for Breast Tumor Detection. Iranian Journal of Medical Physics, 13 (4). pp. 261-268.

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Introduction Breast cancer is the second cause of mortality among women. Early detection of it can enhance the chance of survival. Screening systems such as mammography cannot perfectly differentiate between patients and healthy individuals. Computer-aided diagnosis can help physicians make a more accurate diagnosis. Materials and Methods Regarding the importance of separating normal and abnormal cases in screening systems, a hierarchical classification system is defined in this paper. The proposed system is including two Adaptive Boosting (AdaBoost) classifiers, the first classifier separates the candidate images into two groups of normal and abnormal. The second classifier is applied on the abnormal group of the previous stage and divides them into benign and malignant categories. The proposed algorithm is evaluated by applying it on publicly available Mammographic Image Analysis Society (MIAS) dataset. 288 images of the database are used, including 208 normal and 80 abnormal images. 47 images of the abnormal images showed benign lesion and 33 of them had malignant lesion. Results Applying the proposed algorithm on MIAS database indicates its advantage compared to previous methods. A major improvement occurred in the first classification stage. Specificity, sensitivity, and accuracy of the first classifier are obtained as 100, 95.83, and 97.91, respectively. These values are calculated as 75 in the second stage  Conclusion A hierarchical classification method for breast cancer detection is developed in this paper. Regarding the importance of separating normal and abnormal cases in screening systems, the first classifier is devoted to separate normal and tumorous cases. Experimental results on available database shown that the performance of this step is adequately high (100 specificity). The second layer is designed to detect tumor type. The accuracy in the second layer is obtained 75. Â

Item Type: Article
Subjects: QS Human Anatomy
WN Radiology . Diagnostic Imaging
Divisions: Journals > Iranian J Medical Physics
Depositing User: ijmp ijmp
Date Deposited: 19 Sep 2017 15:12
Last Modified: 19 Sep 2017 15:12
URI: http://eprints.mums.ac.ir/id/eprint/1411

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