U-net based approach for pectoralis muscle segmentation in digital mammography

Accurate segmentation of the breast is a fundamental step in computer-aided diagnosis (CAD) systems for mammography. In particular, several tasks, such as the classification of breast density, evaluation of correct positioning of the breast, and automatic detection and classification of suspicious l...

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Main Authors: Francesca Angelone, Alfonso Maria Ponsiglione, Roberto Grassi, Francesco Amato, Mario Sansone
Format: Article
Language:English
Published: Elsevier 2025-01-01
Series:Computer Methods and Programs in Biomedicine Update
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Online Access:http://www.sciencedirect.com/science/article/pii/S2666990025000357
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author Francesca Angelone
Alfonso Maria Ponsiglione
Roberto Grassi
Francesco Amato
Mario Sansone
author_facet Francesca Angelone
Alfonso Maria Ponsiglione
Roberto Grassi
Francesco Amato
Mario Sansone
author_sort Francesca Angelone
collection DOAJ
description Accurate segmentation of the breast is a fundamental step in computer-aided diagnosis (CAD) systems for mammography. In particular, several tasks, such as the classification of breast density, evaluation of correct positioning of the breast, and automatic detection and classification of suspicious lesions, preliminarily require an accurate segmentation of the pectoralis muscle. This study aims to propose an automatic breast segmentation algorithm that combines traditional methods with Deep Learning methods limited only to the border region between the muscle and the breast. This type of approach allows for reducing the risk of having good overall accuracy in multi-class classification that does not reflect adequate accuracy with respect to small classes, such as the pectoralis muscle in a mammographic image. The U-Net network was therefore implemented on patches extracted along the straight line with which the muscle-breast edge was first estimated. The predicted patches are repositioned to perform an edge refinement and obtain the total breast mask, using histogram-based thresholding to segment the background from the breast. The results show Dice values equal to 0.848 ± 0.196 and Jaccard index equal to 0.774 ± 0.227 for the single patches, and Dice values equal to 0.971 ± 0.011 and Jaccard index equal to 0.944 ± 0.022 for the entire breast segmentation.
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spelling doaj-art-b8b2ddbf0ee74fdcb670a45c86bc83782025-08-20T04:00:32ZengElsevierComputer Methods and Programs in Biomedicine Update2666-99002025-01-01810021010.1016/j.cmpbup.2025.100210U-net based approach for pectoralis muscle segmentation in digital mammographyFrancesca Angelone0Alfonso Maria Ponsiglione1Roberto Grassi2Francesco Amato3Mario Sansone4University of Sannio - Department of Engineering, Corso Garibaldi 107, 82100 Benevento, ItalyDepartment of Electrical Engineering and Information Technology, University of Naples Federico II, Naples, Italy; Corresponding author.Department of Precision Medicine Division of Radiology, University of Campania ’Luigi Vanvitelli’, Naples, ItalyDepartment of Electrical Engineering and Information Technology, University of Naples Federico II, Naples, ItalyDepartment of Electrical Engineering and Information Technology, University of Naples Federico II, Naples, ItalyAccurate segmentation of the breast is a fundamental step in computer-aided diagnosis (CAD) systems for mammography. In particular, several tasks, such as the classification of breast density, evaluation of correct positioning of the breast, and automatic detection and classification of suspicious lesions, preliminarily require an accurate segmentation of the pectoralis muscle. This study aims to propose an automatic breast segmentation algorithm that combines traditional methods with Deep Learning methods limited only to the border region between the muscle and the breast. This type of approach allows for reducing the risk of having good overall accuracy in multi-class classification that does not reflect adequate accuracy with respect to small classes, such as the pectoralis muscle in a mammographic image. The U-Net network was therefore implemented on patches extracted along the straight line with which the muscle-breast edge was first estimated. The predicted patches are repositioned to perform an edge refinement and obtain the total breast mask, using histogram-based thresholding to segment the background from the breast. The results show Dice values equal to 0.848 ± 0.196 and Jaccard index equal to 0.774 ± 0.227 for the single patches, and Dice values equal to 0.971 ± 0.011 and Jaccard index equal to 0.944 ± 0.022 for the entire breast segmentation.http://www.sciencedirect.com/science/article/pii/S2666990025000357Automatic segmentationBreast imagingPectoralis muscleU-Net
spellingShingle Francesca Angelone
Alfonso Maria Ponsiglione
Roberto Grassi
Francesco Amato
Mario Sansone
U-net based approach for pectoralis muscle segmentation in digital mammography
Computer Methods and Programs in Biomedicine Update
Automatic segmentation
Breast imaging
Pectoralis muscle
U-Net
title U-net based approach for pectoralis muscle segmentation in digital mammography
title_full U-net based approach for pectoralis muscle segmentation in digital mammography
title_fullStr U-net based approach for pectoralis muscle segmentation in digital mammography
title_full_unstemmed U-net based approach for pectoralis muscle segmentation in digital mammography
title_short U-net based approach for pectoralis muscle segmentation in digital mammography
title_sort u net based approach for pectoralis muscle segmentation in digital mammography
topic Automatic segmentation
Breast imaging
Pectoralis muscle
U-Net
url http://www.sciencedirect.com/science/article/pii/S2666990025000357
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AT robertograssi unetbasedapproachforpectoralismusclesegmentationindigitalmammography
AT francescoamato unetbasedapproachforpectoralismusclesegmentationindigitalmammography
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