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Dissertations / Theses on the topic 'Mammography Images'

Author: Grafiati
Published: 5 June 2025
Last updated: 2 August 2025

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1

Richardson, Richard Thomas. "Image Enhancement of Cancerous Tissue in Mammography Images." NSUWorks, 2015. http://nsuworks.nova.edu/gscis_etd/39.

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This research presents a framework for enhancing and analyzing time-sequenced mammographic images for detection of cancerous tissue, specifically designed to assist radiologists and physicians with the detection of breast cancer. By using computer aided diagnosis (CAD) systems as a tool to help in the detection of breast cancer in computed tomography (CT) mammography images, previous CT mammography images will enhance the interpretation of the next series of images. The first stage of this dissertation applies image subtraction to images from the same patient over time. Image types are defined
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2

Brooks, Kenneth W. "Automated analysis of mammography phantom images." Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/17900.

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3

Highnam, Ralph Philip. "Model-based enhancement of mammographic images." Thesis, University of Oxford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306524.

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4

Soh, Bao Lin Pauline. "Test-Set Reading: Value to Mammography." Thesis, The University of Sydney, 2014. http://hdl.handle.net/2123/11557.

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Purpose: The purpose of this thesis is to understand the relationship between mammographic performance based on actual clinical reading and performances at screen read test-sets, as well as to examine the potential causal agents for any lack of correlation. Methods: This study was designed to encompass three facets. The first element investigated the extent to which test-set reading can represent actual clinical reporting in screening mammography. The second element examined the manner that the location where reading takes place and the availability of prior images can impact upon performance
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Rystedt, Beata. "Breast Cancer Risk Localization in Mammography Images using Deep Learning." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-279577.

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Breast cancer is the most common form of cancer among women, with around 9000 new diagnoses in Sweden yearly. Detecting and localizing risk of breast cancer could give the opportunity for individualized examination programs and preventative measures if necessary, and potentially be lifesaving. In this study, two deep learning methods have been designed, trained and evaluated on mammograms from healthy patients whom were later diagnosed with breast cancer, to examine how well deep learning models can localize suspicious areas in mammograms. The first proposed model is a ResNet-18 regression mod
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6

Matheus, Bruno Roberto Nepomuceno. "Sistema JAVA para gerenciamento de esquema CADx em mamografia." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/18/18152/tde-22102015-093201/.

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Estudos mostram que a maior parte dos erros de diagnóstico mamográfico estão ligados a dificuldades de classificação e não de detecção (MEYER, EBERLEIN, et al., 1990; KARSSEMEIJER, 2011; SCHIABEL, 2014). Uma possível solução a este problema é a estruturação de um esquema CADx (Computer-aided Diagnosis), ou seja, um sistema computacional que analisa as informações disponíveis e tenta apresentar um diagnóstico com base nos dados fornecidos pela imagem processada. Este trabalho tem como intuito apresentar um esquema CADe/Dx completo e funcional para uso por radiologistas. O software final poderá
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7

Alsager, Abdulaziz A. "Optimisation of qualitative and quantitative assessment of images in digital mammography." Thesis, University of Surrey, 2009. http://epubs.surrey.ac.uk/843304/.

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The main aim of the breast screening programme (BSP) is to provide early detection of breast lesions permitting efficient treatment. At present the BSP is technically run using conventional screen film (S/F) X-ray mammography, which suffers from a number of inherent limitations. Most of these limitations could be overcome by the use of digital mammography technology. Such a technology has to, however, show image performance that is as good as or better than that for S/F systems. The performance of a digital mammography system can be quantified and compared in a number of different ways. These
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8

Aznar, Marianne. "Quantitative analysis of metabolic breast images from Positron Emission Mammography (PEM)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0035/MQ50714.pdf.

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9

Stemberg, Débora Regina Malvesi. "Desenvolvimento de simulador mamográfico para avaliação de esquemas CAD." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/18/18152/tde-10082010-135546/.

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Visando a um melhor desempenho na avaliação de imagens mamográficas, diversos trabalhos utilizando técnicas de processamento de imagem vêm sendo desenvolvidos como parte de esquemas computacionais que auxiliam o diagnóstico, denominados de esquemas CAD. Entretanto, um dos maiores desafios no desenvolvimento destes sistemas está relacionado com a avaliação de seu desempenho, que pode apresentar inconsistências, como impossibilidade de comparação dos resultados devido à dificuldade de se obter bancos de imagens amplos, comuns e confiáveis, que apresentem características de aquisição variadas ate
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10

Oliver, i. Malagelada Arnau. "Automatic mass segmentation in mammographic images." Doctoral thesis, Universitat de Girona, 2007. http://hdl.handle.net/10803/7739.

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Aquesta tesi està emmarcada dins la detecció precoç de masses, un dels símptomes més clars del càncer de mama, en imatges mamogràfiques. Primerament, s'ha fet un anàlisi extensiu dels diferents mètodes de la literatura, concloent que aquests mètodes són dependents de diferent paràmetres: el tamany i la forma de la massa i la densitat de la mama. Així, l'objectiu de la tesi és analitzar, dissenyar i implementar un mètode de detecció robust i independent d'aquests tres paràmetres. Per a tal fi, s'ha construït un patró deformable de la massa a partir de l'anàlisi de masses reals i, a continuació,
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11

Pettit, Elaine J. (Elaine Joyce). "Synthesis of 2-D Images From the Wigner Distribution with Applications to Mammography and Edge Extraction." Thesis, University of North Texas, 1995. https://digital.library.unt.edu/ark:/67531/metadc332685/.

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A new method for the general application of quadratic spatial/spatial frequency domain filtering to imagery is presented in this dissertation. The major contribution of this research is the development of an original algorithm for approximating the inverse psuedo Wigner distribution through synthesis of an image in the spatial domain which approximates the result of filtering an original image in the DPWD domain.
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12

Bergman, Alanah M. "The evaluation of a positron emission mammography (PEM) system using images co-registered with X-ray mammograms /." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0001/MQ37093.pdf.

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13

Teixeira, Ana Cristina da Fonseca. "Sensitivity correction of images obtained with the prototype Clear-PEM in pre-clinical environment." Master's thesis, Faculdade de Ciências e Tecnologia, 2009. http://hdl.handle.net/10362/10571.

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Dissertation presented at Faculdade de Ciências e Tecnologia Universidade Nova de Lisboa to obtain a Master Degree in Biomedical Engineering<br>Nuclear medicine has, when compared to anatomical imaging techniques, the great advantage of identifying the metabolic activity of the cells, hence becoming a great option for tumour identification. A new technology in this area is Positron Emission Mammography (PEM) that follows the same physical basics of Positron Emission Tomography (PET). The Clear-PEM project, a Portuguese research project, uses this technology and, in alternative to the whole-bo
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14

Hmida, Marwa. "Reconnaissance de formes basée sur l'approche possibiliste dans les images mammographiques." Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2017. http://www.theses.fr/2017IMTA0061/document.

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Face à l'augmentation significative du taux de mortalité par cancer du sein chez les femmes ainsi que la croissance continue du nombre de mammographies réalisées chaque année, le diagnostic assisté par ordinateur devient de plus en plus impératif pour les experts. Dans notre travail de thèse, une attention particulière est accordée aux masses mammaires vu qu'elles représentent le signe de cancer du sein le plus couramment observé en mammographies. Néanmoins, ces images présentent un très faible contraste, ce qui fait que les frontières entre les tissus sains et les masses sont mal définies. C'
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15

Góis, Renata de Freitas. "Investigação do uso de imagens mamográficas adquiridas em diferentes digitalizadores no desempenho do processamento de imagens para detecção de microcalcificações." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/18/18152/tde-07022007-114730/.

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O presente projeto de pesquisa trata de uma comparação no processamento de imagens mamográficas adquiridas no scanner a laser (Lumiscan50) e no scanner óptico convencional com adaptador para digitalização de filme (Umax mod. PowerLook 1120). Por meio de uma análise estatística, verificou-se que o scanner óptico produz um aumento acentuado na intensidade (nível de cinza) na imagem digitalizada em relação ao mamograma original. Em função dessas respostas, foi desenvolvido um procedimento para compensar o deslocamento da curva de cada digitalizador em relação à curva característica do filme. Em s
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16

Góis, Renata de Freitas. "Investigações sobre digitalização de imagens mamográficas: padronização da qualidade da imagem e seu efeito no desempenho de esquemas de processamento." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/18/18152/tde-25032011-092835/.

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Este trabalho trata, inicialmente, de uma extensa investigação acerca do efeito que o processo de digitalização da imagem exerce num esquema de processamento de imagens em mamografia. Como todas as etapas de processamento tomam por base a imagem original digitalizada, os diferentes equipamentos, tecnologias, softwares de aquisição e características do processo contribuem para produzir diferentes aspectos na digitalização de um mesmo filme mamográfico. Por conseguinte, as etapas envolvidas do pré-processamento à classificação, passando principalmente pela segmentação dessas imagens, poderão pro
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Rodrigues, Pâmela Serra. "Ferramentas de interação e gerenciamento do BancoWeb: uma base de imagens para auxílio a pesquisas na área de mamografia digital." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/18/18152/tde-04022019-114720/.

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O BancoWeb é uma base de imagens para auxilio a pesquisa na área de mamografia digital. Oferece o gerenciamento da base de dados com um conjunto amplo de imagens mamográficas de qualidade apropriada ao processamento digital e, principalmente, comparação entre diferentes esquemas. O sistema de busca da base de dados/imagens mamográficas está disponível desde 2010, sendo on-line e gratuito. Com os avanços em pesquisas durante todos estes anos, a necessidade e demanda de melhorias, mudanças e incrementos no sistema de gerenciamento e buscas foram surgindo. Por isso, os objetivos deste trabalho es
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18

Lagoeiro, Fábio Gomes. "Interface e integração de esquemas de processamento de imagens para avaliação automática de mamogramas digitalizados." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/18/18133/tde-16052005-111528/.

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Nos últimos anos, a avaliação automática de mamogramas digitalizados tem sido muito estudada. Através da integração de pacotes de programas semi-automáticos de pré-processamento e processamento para auxílio ao diagnóstico precoce do câncer de mama, foi desenvolvido um esquema CAD (Computer-Aided Diagnosis) para mamografia, com o objetivo de otimizar o tempo de processamento da região de interesse e automatizar os processos sem a necessidade de intervenção do usuário durante a execução. Com a automatização criou-se uma interface de fácil operação. Os pacotes de processamento foram devidamente d
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19

Escarpinati, Mauricio Cunha. "Desenvolvimento de um sistema computacional para utilização em procedimentos de controle de qualidade em equipamentos mamográficos." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/18/18133/tde-27082007-213453/.

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O presente trabalho consiste na elaboração de uma metodologia envolvendo técnicas computacionais para proporcionar informações provenientes de avaliação de qualidade de equipamentos mamográficos. A investigação conduzida levou em conta, além da necessária determinação de parâmetros operacionais - como tensão de pico (kVp), corrente de tubo, ponto focal, dose, tempo de exposição, camada semi-redutora -, a influência das características do digitalizador usado no processo de digitalização das imagens a ser avaliadas pelo esquema computacional, seja esse um sistema de aquisição digital direta ou i
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20

Matheus, Bruno Roberto Nepomuceno. "BancoWeb: base de imagens mamográficas para auxílio em avaliações de esquemas CAD." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/18/18152/tde-24062010-155737/.

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Este trabalho teve como objetivo desenvolver uma base de imagens mamográficas online com acesso público para desenvolvimento, testes e avaliação comparativa de esquemas computadorizados de auxilio ao diagnóstico (CADs). A base contem imagens de vários hospitais, com grande variedade de laudos, também disponíveis na base assim como informações sobre dados clínicos (não confidenciais) dos pacientes. Uma interface detalhada foi criada para permitir o fácil acesso público, permitindo o uso de ferramentas de busca, recorte, analise estatística e inserção remota de imagens, entre outras. Testes comp
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Rodrigues, Silvia Cristina Martini. "Organização automática de bancos de mamografias no padrão de densidade BI-RADS." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/18/18133/tde-11112015-152323/.

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Este trabalho apresenta um método computacional que classifica as mamografias no padrão de densidade BI-RADS, visando auxiliar a detecção precoce do câncer de mama, seja essa realizada por análise visual ou por auxílio computadorizado. A classificação das mamografias em bancos padronizados objetiva eliminar conflitos entre laudos mamográficos de diferentes profissionais, bem como quanto à conduta médica a ser seguida. Entretanto, o estabelecimento de bancos feito visualmente e principalmente em períodos diferentes dificulta sua uniformização, proporcionando uma classificação muito subjetiva e
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Senhorini, Kathy Camila Cardozo Osinski. "Simulação computacional de sistemas de registro de imagens mamográficas." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/18/18133/tde-30062016-140609/.

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Neste projeto foi desenvolvido um método computacional para verificação da melhor combinação tela intensificadora - filme para exames mamográficos através do estudo de suas características sensitométricas. O software, desenvolvido em ambiente Delphi para windows, apresenta na tela do microcomputador a imagem a ser obtida para cada tipo de combinação tela intensificadora - filme, utilizando imagens de \"Phantoms\" e de mamas reais. Em razão da ampla quantidade de fatores que influenciam a imagem mamográfica final, tais como magnificação, característica dos filmes e telas intensificadoras e cond
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Marti, Robert. "Multi-modality mammography." Thesis, University of East Anglia, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251724.

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Finn, Jane Rebecca. "Digital image processing for mammography." Thesis, Imperial College London, 1997. http://hdl.handle.net/10044/1/8888.

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Tang, Mengxing. "Image reconstruction in electrical impedance mammography." Thesis, De Montfort University, 2003. http://hdl.handle.net/2086/6260.

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Breast cancer continues to be a leading cause of death in Western countries. One of the most important approaches to reduce this mortality is to detect the cancer as early as possible. Although current diagnostic imaging modalities are able to give useful information for diagnosis, development of new imaging technique is highly desirable in order to detect breast cancer in an earlier stage. This is the motive of the present study of Electrical Impedance Mammography (ElM), which applies Electrical Impedance Tomography (EIT) to image human breasts. The overall aim of the whole project is to deve
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Olsén, Christina. "Towards Automatic Image Analysis for Computerised Mammography." Doctoral thesis, Umeå University, Computing Science, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1657.

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<p>Mammographic screening is an effective way to detect breast cancer. Early detection of breast cancer depends to a high degree on the adequacy of the mammogram from which the diagnosis is made. Today, most of the analysis of the mammogram is performed by radiologists. Computer-aided diagnosis (CAD) systems have been proposed as an aid to increase the efficiency and effectiveness of the screening procedure by automatically indicating abnormalities in the mammograms. However, in order for a CAD system to be stable and efficient, the input images need to be adequate. Criteria for adequacy inclu
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Olsén, Christina. "Towards Automatic Image Analysis for Computerised Mammography /." Umeå : Department of Computing Science, Umeå University, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1657.

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Yip, Mary. "Image simulation framework for digital mammography systems." Thesis, University of Surrey, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.531394.

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CABON, JEAN-PIERRE. "Elaboration des images malignes en mammographie." Nantes, 1988. http://www.theses.fr/1988NANT010M.

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Brown, Wendy L. "Emotional and pain responses to screening mammography /." [St. Lucia, Qld.], 2002. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16300.pdf.

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Shen, Liang. "Region-based adaptive image processing techniques for mammography." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0011/NQ34701.pdf.

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Hong, Byung-Woo. "Image segmentation, shape and registration : application to mammography." Thesis, University of Oxford, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.413508.

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Petroudi, Styliani. "Texture in mammographic image analysis." Thesis, University of Oxford, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.422668.

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McGarry, Gregory John. "Model-based mammographic image analysis." Thesis, Queensland University of Technology, 2002.

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Alcântara, Marcela Costa. "Avaliação dos critérios de qualidade de imagem e estudo das doses em um departamento de mamografia." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/85/85131/tde-23092011-160708/.

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Os critérios de qualidade de imagem mamógrafica publicados pela European Commission foram implementados em três mamógrafos de um mesmo departamento de radiologia de um hospital na cidade de São Paulo. Dentre os mamógrafos dois apresentam o sistema tela-filme e um deles apresenta o sistema digital indireto. Durante o período de coleta de dados, foi observada a necessidade de realizar um estudo sobre índice de rejeição de imagem em cada mamógrafo. Portanto, este estudo foi realizado e, em seguida, foram feitas comparações, entre os mamógrafos, do índice de rejeição de imagem e da porcentagem de
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Che, Ferdinand Ndifor. "A study of image analysis tools for digital mammography." Thesis, University of Kent, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242902.

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Björklund, Tomas. "Automatic evaluation of breast density in mammographic images." Thesis, KTH, Skolan för teknik och hälsa (STH), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-103788.

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The goal of this master thesis is to develop a computerized method for automatic estimation of the mammographic density of mammographic images from 5 different types of mammography units.   Mammographic density is a measurement of the amount of fibroglandular tissue in a breast. This is the single most attributable risk factor for breast cancer; an accurate measurement of the mammographic density can increase the accuracy of cancer prediction in mammography. Today it is commonly estimated through visual inspection by a radiologist, which is subjective and results in inter-reader variation.   T
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Feudjio, Kougoum Cyrille Désiré. "Segmentation of mammographic images for computer aided diagnosis." Thesis, Lille 1, 2016. http://www.theses.fr/2016LIL10152/document.

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Les outils d’aide au diagnostic sont de nos jours au cœur de plusieurs protocoles cliniques car ils améliorent la qualité du diagnostic posé et des soins médicaux. Ce travail de recherche met en avant une architecture hiérarchique pour la conception d'un outil d'aide à la détection du cancer du sein robuste et performant. Il s’intéresse à la réduction des fausses alarmes en identifiant les régions potentiellement cancérogènes. La gamme dynamique des niveaux de gris des zones sombres est étirée pour améliorer le contraste entre la région du sein et l'arrière plan et permettre une meilleure extr
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GENTILLE, ALLOUCHE JOCELYNE. "Semiologie des images stellaires benignes a la mammographie." Amiens, 1992. http://www.theses.fr/1992AMIEM079.

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Linguraru, Marius George. "Feature detection in mammographic image analysis." Thesis, University of Oxford, 2004. http://ora.ox.ac.uk/objects/uuid:b92185f0-c7bf-40e1-bc17-bf71065f001f.

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In modern society, cancer has become one of the most terrifying diseases because of its high and increasing death rate. The disease's deep impact demands extensive research to detect and eradicate it in all its forms. Breast cancer is one of the most common forms of cancer, and approximately one in nine women in the Western world will develop it over the course of their lives. Screening programmes have been shown to reduce the mortality rate, but they introduce an enormous amount of information that must be processed by radiologists on a daily basis. Computer Aided Diagnosis (CAD) systems aim
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Suryanarayanan, Sankararaman. "Design, development, and characterization of a prototype digtal mammography system." Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-03142006-173132/.

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Thesis (Ph. D.)--Biomedical Engineering, Georgia Institute of Technology, 2006.<br>Andrew Karellas, Ph.D., Committee Chair ; Ernest V. Garcia, Ph.D., Committee Member ; Xiaoping P. Hu, Ph.D., Committee Member ; John N. Oshinski, Committee Member.
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Mackenzie, Alistair. "The effect of image quality on cancer detection in mammography." Thesis, University of Surrey, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.658828.

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Breast screening is now undertaken using digital mammography rather than screen film mammography systems. However, there is a wide range in image qualities associated with the use of the different digital detectors available and there is evidence of reduced cancer detection rates with powder phosphor computed radiography (CR) systems. Further work is required to investigate the link between clinical implications and measured image quality. However, clinical studies can be expensive and time-consuming and suffer from various confounding factors. Studies using simulation can be faster and reduce
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Morrison, Steven. "Model based parameter estimation for image analysis." Thesis, Heriot-Watt University, 1999. http://hdl.handle.net/10399/561.

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Yakoubian, Jeffrey Scott. "Adaptive histogram equalization for mammographic image processing." Thesis, Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/16387.

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Kulkarni, Pradnya. "Pixel N-grams for Mammographic Image Classification." Thesis, Federation University Australia, 2017. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/160424.

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X-ray screening for breast cancer is an important public health initiative in the management of a leading cause of death for women. However, screening is expensive if mammograms are required to be manually assessed by radiologists. Moreover, manual screening is subject to perception and interpretation errors. Computer aided detection/diagnosis (CAD) systems can help radiologists as computer algorithms are good at performing image analysis consistently and repetitively. However, image features that enhance CAD classification accuracies are necessary for CAD systems to be deployed. Many CAD syst
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XAVIER, Aline Carvalho da Silva. "Dosimetria e qualidade de imagem em mamografia digital." Universidade Federal de Pernambuco, 2015. https://repositorio.ufpe.br/handle/123456789/16624.

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Submitted by Fabio Sobreira Campos da Costa (fabio.sobreira@ufpe.br) on 2016-04-15T15:22:54Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) DISSERTAÇÃO Aline Carvalho da Silva Xavier.pdf: 7741739 bytes, checksum: a144ef1082bc63af0c0c529b5b83b059 (MD5)<br>Made available in DSpace on 2016-04-15T15:22:54Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) DISSERTAÇÃO Aline Carvalho da Silva Xavier.pdf: 7741739 bytes, checksum: a144ef1082bc63af0c0c529b5b83b059 (MD5) Previous issue date: 2015-
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47

ROCOURT, NATHALIE. "La qualite de l'image en mammographie." Lille 2, 1991. http://www.theses.fr/1991LIL2M366.

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48

Perez-Ponce, Hector. "Corrélation entre les performances physiques mesurées des détecteurs et la qualité diagnostique de l'image en mammographie numérique." Electronic Thesis or Diss., Vandoeuvre-les-Nancy, INPL, 2009. http://www.theses.fr/2009INPL024N.

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En mammographie numérique, il existe deux approches pour évaluer la qualité de l’image. Dans la première approche, une méthode visuelle basée sur un observateur humain permet la détectabilité des lésions en radiographie mammographique. Malheureusement, cette approche subjective de qualité nécessite d’importantes ressources humaines et du temps lors de son implémentation. Dans une deuxième approche, des paramètres objectifs et indépendants de l’observateur humain, présentant une relation avec la résolution et le contraste de l’image (MTF et NPS), sont utilisés pour une évaluation de la performa
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49

Perez-Ponce, Hector. "Corrélation entre les performances physiques mesurées des détecteurs et la qualité diagnostique de l'image en mammographie numérique." Phd thesis, Institut National Polytechnique de Lorraine - INPL, 2009. http://tel.archives-ouvertes.fr/tel-00402161.

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En mammographie numérique, il existe deux approches pour évaluer la qualité de l'image. Dans la première approche, une méthode visuelle basée sur un observateur humain permet la détectabilité des lésions en radiographie mammographique. Malheureusement, cette approche de qualité nécessite d'importantes ressources humaines et du temps lors de son implémentation, et elle est affectée par la variabilité inter-évaluateurs. Dans une deuxième approche, des paramètres objectifs et indépendants de l'observateur humain, présentant une relation avec la résolution et le contraste de l'image (MTF et NPS),
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50

Suryanarayanan, Sankararaman. "Design, Development, and Characterization of a Prototype Digital Mammography System." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14515.

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Breast cancer is a major health concern in the United States. Mammography is the gold standard for screening breast cancer and screen-film technology is still widely used in the screening for breast cancer. However, screen-film systems have limited dynamic range and contrasts compared to digital systems, and do not offer integrated image processing capabilities. Recently, digital mammography has seen an upsurge in clinical adoption but current digital mammography systems are limited in terms of their spatial resolution. Therefore, high-resolution digital mammography systems with superior s
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