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Digital mammography

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https://www.readbyqxmd.com/read/27908154/mass-detection-in-digital-breast-tomosynthesis-deep-convolutional-neural-network-with-transfer-learning-from-mammography
#1
Ravi K Samala, Heang-Ping Chan, Lubomir Hadjiiski, Mark A Helvie, Jun Wei, Kenny Cha
PURPOSE: Develop a computer-aided detection (CAD) system for masses in digital breast tomosynthesis (DBT) volume using a deep convolutional neural network (DCNN) with transfer learning from mammograms. METHODS: A data set containing 2282 digitized film and digital mammograms and 324 DBT volumes were collected with IRB approval. The mass of interest on the images was marked by an experienced breast radiologist as reference standard. The data set was partitioned into a training set (2282 mammograms with 2461 masses and 230 DBT views with 228 masses) and an independent test set (94 DBT views with 89 masses)...
December 2016: Medical Physics
https://www.readbyqxmd.com/read/27896749/computer-aided-breast-cancer-diagnosis-with-optimal-feature-sets-reduction-rules-and-optimization-techniques
#2
Luke Mathieson, Alexandre Mendes, John Marsden, Jeffrey Pond, Pablo Moscato
This chapter introduces a new method for knowledge extraction from databases for the purpose of finding a discriminative set of features that is also a robust set for within-class classification. Our method is generic and we introduce it here in the field of breast cancer diagnosis from digital mammography data. The mathematical formalism is based on a generalization of the k-Feature Set problem called (α, β)-k-Feature Set problem, introduced by Cotta and Moscato (J Comput Syst Sci 67(4):686-690, 2003). This method proceeds in two steps: first, an optimal (α, β)-k-feature set of minimum cardinality is identified and then, a set of classification rules using these features is obtained...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27896471/contrast-enhanced-spectral-mammography-vs-mammography-and-mri-clinical-performance-in-a-multi-reader-evaluation
#3
Eva M Fallenberg, Florian F Schmitzberger, Heba Amer, Barbara Ingold-Heppner, Corinne Balleyguier, Felix Diekmann, Florian Engelken, Ritse M Mann, Diane M Renz, Ulrich Bick, Bernd Hamm, Clarisse Dromain
OBJECTIVES: To compare the diagnostic performance of contrast-enhanced spectral mammography (CESM) to digital mammography (MG) and magnetic resonance imaging (MRI) in a prospective two-centre, multi-reader study. METHODS: One hundred seventy-eight women (mean age 53 years) with invasive breast cancer and/or DCIS were included after ethics board approval. MG, CESM and CESM + MG were evaluated by three blinded radiologists based on amended ACR BI-RADS criteria...
November 28, 2016: European Radiology
https://www.readbyqxmd.com/read/27896452/optimization-of-image-quality-and-dose-in-digital-mammography
#4
Agnes M F Fausto, M C Lopes, M C de Sousa, Tânia A C Furquim, Anderson W Mol, Fermin G Velasco
Nowadays, the optimization in digital mammography is one of the most important challenges in diagnostic radiology. The new digital technology has introduced additional elements to be considered in this scenario. A major goal of mammography is related to the detection of structures on the order of micrometers (μm) and the need to distinguish the different types of tissues, with very close density values. The diagnosis in mammography faces the difficulty that the breast tissues and pathological findings have very close linear attenuation coefficients within the energy range used in mammography...
November 28, 2016: Journal of Digital Imaging: the Official Journal of the Society for Computer Applications in Radiology
https://www.readbyqxmd.com/read/27895876/assessment-of-mean-glandular-dose-in-mammography-system-with-different-anode-filter-combinations-using-mcnp-code
#5
Lida Gholamkar, Ali Asghar Mowlavi, Mahdi Sadeghi, Mitra Athari
BACKGROUND: X-ray mammography is one of the general methods for early detection of breast cancer. Since glandular tissue in the breast is sensitive to radiation and it increases the risk of cancer, the given dose to the patient is very important in mammography. OBJECTIVES: The aim of this study was to determine the average absorbed dose of X-ray radiation in the glandular tissue of the breast during mammography examinations as well as investigating factors that influence the mean glandular dose (MGD)...
October 2016: Iranian Journal of Radiology: a Quarterly Journal Published By the Iranian Radiological Society
https://www.readbyqxmd.com/read/27888024/performance-of-photon-counting-breast-computed-tomography-digital-mammography-and-digital-breast-tomosynthesis-in-evaluating-breast-specimens
#6
Ann-Christin Rößler, Willi Kalender, Daniel Kolditz, Christian Steiding, Veikko Ruth, Caroline Preuss, Sandra Christina Peter, Barbara Brehm, Matthias Hammon, Rüdiger Schulz-Wendtland, Evelyn Wenkel
RATIONALE AND OBJECTIVES: This study compared a novel photon-counting breast computed tomography (pcBCT) system with digital mammography (DM) and digital breast tomosynthesis (DBT) systems. For this reason, surgical specimens were examined with all three techniques and rated by three observers. MATERIALS AND METHODS: A total of 30 surgical specimens were investigated with DM, DBT, and pcBCT; the associated images were shown to three experienced radiologists. Findings (22 microcalcifications and 23 mass lesions) were recorded and compared to the results of the pathological examination...
November 22, 2016: Academic Radiology
https://www.readbyqxmd.com/read/27886719/a-dual-stage-adaptive-thresholding-dusat-for-automatic-mass-detection-in-mammograms
#7
J Anitha, J Dinesh Peter, S Immanuel Alex Pandian
BACKGROUND AND OBJECTIVE: Early detection and diagnosis of breast cancer through mammography screening reduces breast cancer mortality by around 20%. However it is often a complex process to differentiate abnormalities due to the ill-defined margins and subtle appearances. METHOD: This paper investigates a new computer aided approach to detect the abnormalities in the digital mammograms using a Dual Stage Adaptive Thresholding (DuSAT). The suspicious mass region is identified using global histogram and local window thresholding method...
January 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/27870337/breast-cancers-found-with-digital-breast-tomosynthesis-a-comparison-of-pathology-and-histologic-grade
#8
Wei-Shin Wang, Lara Hardesty, James Borgstede, Jayme Takahashi, Sharon Sams
To compare the pathology and histologic grading of breast cancers detected with digital breast tomosynthesis to those found with conventional digital mammography. The institutional review board approved this study. A database search for all breast cancers diagnosed from June 2012 through December 2013 was performed. Imaging records for these cancers were reviewed and patients who had screening mammography with tomosynthesis as their initial examination were selected. Five dedicated breast imaging radiologists reviewed each of these screening mammograms to determine whether the cancer was visible on conventional digital mammography or whether tomosynthesis was needed to identify the cancer...
November 2016: Breast Journal
https://www.readbyqxmd.com/read/27861206/comparison-of-the-detection-rate-of-simulated-microcalcifications-in-full-field-digital-mammography-digital-breast-tomosynthesis-and-synthetically-reconstructed-2-dimensional-images-performed-with-2-different-digital-x-ray-mammography-systems
#9
Sabine Peters, Martin Hellmich, Alexander Stork, Jörn Kemper, Olga Grinstein, Michael Püsken, Leandra Stahlhut, Sonja Kinner, David Maintz, Kathrin Barbara Krug
OBJECTIVE: The aim of this study was to compare the microcalcification detectability in an anthropomorphic phantom model regarding number, size, and shape in full-field digital mammography (FFDM), synthetically reconstructed 2-dimensional (Synthetic-2D) images, and digital breast tomosynthesis (DBT) performed with 2 different x-ray mammography systems. MATERIALS AND METHODS: Simulated microcalcifications of different numbers (0 to >39), sizes (diameter, 100-800 μm), and shapes (round vs heterogeneous) were scattered by random distribution on 50 film phantoms each divided in 4 quadrants...
November 17, 2016: Investigative Radiology
https://www.readbyqxmd.com/read/27854006/mammography-an-update-of-the-eusobi-recommendations-on-information-for-women
#10
Francesco Sardanelli, Eva M Fallenberg, Paola Clauser, Rubina M Trimboli, Julia Camps-Herrero, Thomas H Helbich, Gabor Forrai
: This article summarises the information to be offered to women about mammography. After a delineation of the aim of early diagnosis of breast cancer, the difference between screening mammography and diagnostic mammography is explained. The need to bring images and reports from the previous mammogram (and from other recent breast imaging examinations) is highlighted. Mammography technique and procedure are described with particular attention to discomfort and pain experienced by a small number of women who undergo the test...
November 16, 2016: Insights Into Imaging
https://www.readbyqxmd.com/read/27853496/a-case-of-a-concurrent-and-co-located-invasive-carcinoma-and-a-fibroadenoma-to-illustrate-the-potential-of-dual-energy-contrast-enhanced-digital-mammography-on-the-diagnosis-of-complex-breast-lesions
#11
Maria Del Mar Travieso Aja, Purificacion Munoz, Mario Rodriguez Rodriguez, Victor Vega Benitez, Octavio P Luzardo
Up to 19% of breast malignancies may be missed by conventional imaging techniques, especially when they are concurrent or co-located with other benign lesions. However, more sensitive techniques, such as magnetic resonance imaging (MRI), are often too expensive for routine use in developing countries. Contrast-enhanced, dual-energy digital mammography (CESM) is a recently introduced imaging modality whose performance has been reported to be similar to that of MRI. Being much cheaper, CESM may constitute a good alternative for improving diagnostic sensitivity in these countries...
July 2016: Iranian Journal of Radiology: a Quarterly Journal Published By the Iranian Radiological Society
https://www.readbyqxmd.com/read/27844218/microcalcification-segmentation-from-mammograms-a-morphological-approach
#12
Marcin Ciecholewski
This publication presents a computer method for segmenting microcalcifications in mammograms. It makes use of morphological transformations and is composed of two parts. The first part detects microcalcifications morphologically, thus allowing the approximate area of their occurrence to be determined, the contrast to be improved, and noise to be reduced in the mammograms. In the second part, a watershed segmentation of microcalcifications is carried out. This study was carried out on a test set containing 200 ROIs 512 × 512 pixels in size, taken from mammograms from the Digital Database for Screening Mammography (DDSM), including 100 cases showing malignant lesions and 100 cases showing benign ones...
November 14, 2016: Journal of Digital Imaging: the Official Journal of the Society for Computer Applications in Radiology
https://www.readbyqxmd.com/read/27842661/diagnostic-performance-of-digital-breast-tomosynthesis-with-a-wide-scan-angle-compared-to-full-field-digital-mammography-for-the-detection-and-characterization-of-microcalcifications
#13
Paola Clauser, Georg Nagl, Thomas H Helbich, Katja Pinker-Domenig, Michael Weber, Panagiotis Kapetas, Maria Bernathova, Pascal A T Baltzer
OBJECTIVES: To assess the diagnostic performance of digital breast tomosynthesis (DBT), with a wide scan-angle, compared to full-field digital mammography (FFDM), for the detection and characterization of microcalcifications. METHODS: IRB approval was obtained for this retrospective study. We selected 150 FFDM and DBT (50 benign and 50 malignant histologically verified microcalcifications, 50 cases classified as BI-RADS 1). Four radiologists evaluated, in separate sessions and blinded to patients' history and histology, the presence of microcalcifications...
December 2016: European Journal of Radiology
https://www.readbyqxmd.com/read/27837442/non-calcified-ductal-carcinoma-in-situ-of-the-breast-comparison-of-diagnostic-accuracy-of-digital-breast-tomosynthesis-digital-mammography-and-ultrasonography
#14
Xiaohui Su, Qing Lin, Chunxiao Cui, Wenjian Xu, Zhimin Wei, Jie Fei, Lili Li
BACKGROUND: To retrospectively compare the diagnostic accuracy of digital breast tomosynthesis (DBT), digital mammography (DM), and ultrasonography (US) in non-calcified ductal carcinoma in situ (DCIS, include DCIS with micro-invasion). PATIENTS AND METHODS: Ninety-eight patients with non-calcified DCIS (include DCIS with micro-invasion) were enrolled in our study. Breast carcinoma in situ was confirmed by surgical pathologic evaluation. Our Institutional Review Board granted approval and the participating women provided written informed consent...
November 11, 2016: Breast Cancer: the Journal of the Japanese Breast Cancer Society
https://www.readbyqxmd.com/read/27832519/automatic-estimation-of-volumetric-breast-density-using-artificial-neural-network-based-calibration-of-full-field-digital-mammography-feasibility-on-japanese-women-with-and-without-breast-cancer
#15
Jeff Wang, Fumi Kato, Hiroko Yamashita, Motoi Baba, Yi Cui, Ruijiang Li, Noriko Oyama-Manabe, Hiroki Shirato
Breast cancer is the most common invasive cancer among women and its incidence is increasing. Risk assessment is valuable and recent methods are incorporating novel biomarkers such as mammographic density. Artificial neural networks (ANN) are adaptive algorithms capable of performing pattern-to-pattern learning and are well suited for medical applications. They are potentially useful for calibrating full-field digital mammography (FFDM) for quantitative analysis. This study uses ANN modeling to estimate volumetric breast density (VBD) from FFDM on Japanese women with and without breast cancer...
November 10, 2016: Journal of Digital Imaging: the Official Journal of the Society for Computer Applications in Radiology
https://www.readbyqxmd.com/read/27822617/digital-mammography-screening-sensitivity-of-the-programme-dependent-on-breast-density
#16
Stefanie Weigel, W Heindel, J Heidrich, H-W Hense, O Heidinger
OBJECTIVES: To analyse the impact of breast density on the sensitivity of a population-based digital mammography screening programme (SP) as key evaluation parameter. METHODS: 25,576 examinations were prospectively stratified from ACR category 1 to 4 for increments of 25 % density during independent double reading. SP was calculated as number of screen-detected cancers divided by the sum of screen-detected plus interval cancers (24-months period) per ACR category, related to the first reading (a), second reading (b) and highest stratification if discrepant (c)...
November 7, 2016: European Radiology
https://www.readbyqxmd.com/read/27814818/digital-breast-tomosynthesis-utilization-in-the-united-states-a-survey-of-physician-members-of-the-society-of-breast-imaging
#17
Lara A Hardesty, Sarah M Kreidler, Deborah H Glueck
PURPOSE: To assess utilization of digital breast tomosynthesis (DBT) and examine criteria for offering DBT to patients. METHODS: We created an online survey for physician members of the Society of Breast Imaging to assess their use of DBT. The questions covered availability of DBT at the participant's practice, whether DBT was used for clinical care or research, clinical decision rules guiding patient selection for DBT, costs associated with DBT, plans to obtain DBT, and breast imaging practice characteristics...
November 2016: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/27814817/digital-breast-tomosynthesis-and-the-challenges-of-implementing-an-emerging-breast-cancer-screening-technology-into-clinical-practice
#18
Christoph I Lee, Constance D Lehman
Emerging imaging technologies, including digital breast tomosynthesis, have the potential to transform breast cancer screening. However, the rapid adoption of these new technologies outpaces the evidence of their clinical and cost-effectiveness. The authors describe the forces driving the rapid diffusion of tomosynthesis into clinical practice, comparing it with the rapid diffusion of digital mammography shortly after its introduction. They outline the potential positive and negative effects that adoption can have on imaging workflow and describe the practice management challenges when incorporating tomosynthesis...
November 2016: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/27807699/position-paper-on-screening-for-breast-cancer-by-the-european-society-of-breast-imaging-eusobi-and-30-national-breast-radiology-bodies-from-austria-belgium-bosnia-and-herzegovina-bulgaria-croatia-czech-republic-denmark-estonia-finland-france-germany-greece
#19
Francesco Sardanelli, Hildegunn S Aase, Marina Álvarez, Edward Azavedo, Henk J Baarslag, Corinne Balleyguier, Pascal A Baltzer, Vanesa Beslagic, Ulrich Bick, Dragana Bogdanovic-Stojanovic, Ruta Briediene, Boris Brkljacic, Julia Camps Herrero, Catherine Colin, Eleanor Cornford, Jan Danes, Gérard de Geer, Gul Esen, Andrew Evans, Michael H Fuchsjaeger, Fiona J Gilbert, Oswald Graf, Gormlaith Hargaden, Thomas H Helbich, Sylvia H Heywang-Köbrunner, Valentin Ivanov, Ásbjörn Jónsson, Christiane K Kuhl, Eugenia C Lisencu, Elzbieta Luczynska, Ritse M Mann, Jose C Marques, Laura Martincich, Margarete Mortier, Markus Müller-Schimpfle, Katalin Ormandi, Pietro Panizza, Federica Pediconi, Ruud M Pijnappel, Katja Pinker, Tarja Rissanen, Natalia Rotaru, Gianni Saguatti, Tamar Sella, Jana Slobodníková, Maret Talk, Patrice Taourel, Rubina M Trimboli, Ilse Vejborg, Athina Vourtsis, Gabor Forrai
: EUSOBI and 30 national breast radiology bodies support mammography for population-based screening, demonstrated to reduce breast cancer (BC) mortality and treatment impact. According to the International Agency for Research on Cancer, the reduction in mortality is 40 % for women aged 50-69 years taking up the invitation while the probability of false-positive needle biopsy is <1 % per round and overdiagnosis is only 1-10 % for a 20-year screening. Mortality reduction was also observed for the age groups 40-49 years and 70-74 years, although with "limited evidence"...
November 2, 2016: European Radiology
https://www.readbyqxmd.com/read/27807331/-comparison-of-the-diagnostic-efficiency-between-digital-breast-tomosynthesis-and-full-field-digital-mammography
#20
Siqing Cai, Jianxiang Yan, Donglu Cai, Meiling Huang, Lisheng Yan
To explore the effect of digital breast tomosynthesis (DBT) on the classification of breast imaging-reporting and data system (BI-RADS) and its significance.
 Methods: A total of 832 patients with breast diseases, who came from Second Clinical College of Fujian Medical University from May 2013 to November 2013, were collected. The patients were examined by double position radiography (including craniocaudol and mediolateral oblique) and COMBO mode [including DBT and full-field digital mammography (FFDM)]...
October 28, 2016: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
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