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Breast peripheral area correction in digital mammograms

Digital mammograms may present an overexposed area in the peripheral part of the breast, which is visually shown as a darker area with lower contrast. This has a direct impact on image quality and affects image visualisation and assessment. This paper presents an automatic method to enhance the overexposed peripheral breast area providing a more homogeneous and improved view of the whole mammogram. The method automatically restores the overexposed area by equalising the image using information from the intensity of non-overexposed neighbour pixels. The correction is based on a multiplicative model and on the computation of the distance map from the breast boundary. A total of 334 digital mammograms were used for evaluation. Mammograms before and after enhancement were evaluated by an expert using visual comparison. In 90.42% of the cases, the enhancement obtained improved visualisation compared to the original image in terms of contrast and detail. Moreover, results show that lesions found in the peripheral area after enhancement presented a more homogeneous intensity distribution. Hence, peripheral enhancement is shown to improve visualisation and will play a role in further development of CAD systems in mammography

This work was partially funded by the Spanish R+D+I Grant no. TIN2012-37171-C02-01. M. Tortajada holds a UdG BR-GR10 grant

© Computers in Biology and Medicine, 2014, vol. 50, p. 32-40

Elsevier

Manager: Ministerio de Economía y Competitividad (Espanya)
Author: Tortajada Giménez, Meritxell
Oliver i Malagelada, Arnau
Martí Marly, Robert
Ganau, Sergi
Tortajada, Lídia
Sentís, Melcior
Freixenet i Bosch, Jordi
Zwiggelaar, Reyer
Date: 2014 July 1
Abstract: Digital mammograms may present an overexposed area in the peripheral part of the breast, which is visually shown as a darker area with lower contrast. This has a direct impact on image quality and affects image visualisation and assessment. This paper presents an automatic method to enhance the overexposed peripheral breast area providing a more homogeneous and improved view of the whole mammogram. The method automatically restores the overexposed area by equalising the image using information from the intensity of non-overexposed neighbour pixels. The correction is based on a multiplicative model and on the computation of the distance map from the breast boundary. A total of 334 digital mammograms were used for evaluation. Mammograms before and after enhancement were evaluated by an expert using visual comparison. In 90.42% of the cases, the enhancement obtained improved visualisation compared to the original image in terms of contrast and detail. Moreover, results show that lesions found in the peripheral area after enhancement presented a more homogeneous intensity distribution. Hence, peripheral enhancement is shown to improve visualisation and will play a role in further development of CAD systems in mammography
This work was partially funded by the Spanish R+D+I Grant no. TIN2012-37171-C02-01. M. Tortajada holds a UdG BR-GR10 grant
Format: application/pdf
Citation: 022081
ISSN: 0010-4825
Document access: http://hdl.handle.net/10256/10920
Language: eng
Publisher: Elsevier
Collection: MINECO/PN 2013-2015/TIN2012-37171-C02-01
Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.compbiomed.2014.03.010
Articles publicats (D-ATC)
Is part of: © Computers in Biology and Medicine, 2014, vol. 50, p. 32-40
Rights: Tots els drets reservats
Subject: Imatges -- Processament
Image processing
Mama -- Radiografia
Breast -- Radiography
Imatges digitals
Digital images
Imatgeria mèdica
Imaging systems in medicine
Title: Breast peripheral area correction in digital mammograms
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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