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https://www.readbyqxmd.com/read/28230532/optimization-of-volumetric-breast-density-estimation-in-digital-mammograms
#1
Katharina Holland, Albert Gubern-Merida, Ritse Mann, Nico Karssemeijer
Fibroglandular tissue volume and percent density can be estimated in unprocessed mammograms using a physics-based method, which relies on an internal reference value representing the projection of fat only. However, pixels representing fat only may not be present in dense breasts, causing an underestimation of density measurements. In this work, we investigate alternative approaches for obtaining a tissue reference value to improve density estimations, particularly in dense breasts. Two of three investigated reference values (F1, F2) are percentiles of the pixel value distribution in the breast interior (the contact area of breast and compression paddle)...
February 23, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28227382/a-new-approach-for-the-detection-of-architectural-distortions-using-textural-analysis-of-surrounding-tissue
#2
Imad Zyout, Roberto Togneri, Imad Zyout, Roberto Togneri, Roberto Togneri, Imad Zyout
Aiming at improving the performance of computer-aided detection of architectural distortion (AD) in mammograms, this paper investigates whether textural patterns of AD surrounding tissue (ST) have the potential to detect AD signatures. More specifically, for characterizing the presence of AD; we investigated the application of textural analysis for discriminating between AD surrounding tissue and normal breast parenchyma. We evaluated the underlying hypothesis using a dataset of 2544 regions of interest (ROI) obtained from the Digital Database for Screening Mammography (DDSM)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226399/wavelet-based-scaling-indices-for-breast-cancer-diagnostics
#3
T Roberts, M Newell, W Auffermann, B Vidakovic
Mammography is routinely used to screen for breast cancer. However, the radiological interpretation of mammogram images is complicated by the heterogeneous nature of normal breast tissue and the fact that cancers are often of the same radiographic density as normal tissue. In this work, we use wavelets to quantify spectral slopes of breast cancer cases and controls and demonstrate their value in classifying images. In addition, we propose asymmetry statistics to be used in forming features, which improve the classification result...
February 22, 2017: Statistics in Medicine
https://www.readbyqxmd.com/read/28225643/screening-mammography-patient-perceptions-and-preferences-regarding-communication-of-estimated-breast-cancer-risk
#4
Nita Amornsiripanitch, Mark Mangano, Bethany L Niell
OBJECTIVE: Many models exist to estimate a woman's risk of development of breast cancer. At screening mammography, many imaging centers collect data required for these models to identify women who may benefit from supplemental screening and referral for cancer risk assessment. The purpose of this study was to discern perceptions and preferences of screening mammography patients regarding communication of estimated breast cancer risk. SUBJECTS AND METHODS: An anonymous survey was distributed to screening and surveillance mammography patients between April and June 2015...
February 22, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28221096/clinical-performance-of-synthesized-two-dimensional-mammography-combined-with-tomosynthesis-in-a-large-screening-population
#5
Mireille P Aujero, Sara C Gavenonis, Ron Benjamin, Zugui Zhang, Jacqueline S Holt
Purpose To compare the clinical performance of synthesized two-dimensional (s2D) mammography combined with digital breast tomosynthesis (DBT) with that of full-field digital mammography (FFDM) alone and FFDM combined with DBT in a large community-based screening population by analyzing recall rate, positive predictive value, and cancer detection rate. Materials and Methods This was a retrospective study approved by the institutional review board and was HIPAA compliant with waiver of informed consent. A total of 78 810 screening mammograms from October 11, 2011, to June 30, 2016, were retrospectively collected...
February 21, 2017: Radiology
https://www.readbyqxmd.com/read/28220929/increasing-the-efficiency-on-producing-radiology-reports-for-breast-cancer-diagnosis-by-means-of-structured-reports-a-comparative-study
#6
J Damian Segrelles, Rosana Medina, Ignacio Blanquer, Luis Martí-Bonmatí
BACKGROUND: Radiology reports are commonly written on free-text using voice recognition devices. Structured reports (SR) have a high potential but they are usually considered more difficult to fill-in so their adoption in clinical practice leads to a lower efficiency. However, some studies have demonstrated that in some cases, producing SRs may require shorter time than plain-text ones. This work focuses on the definition and demonstration of a methodology to evaluate the productivity of software tools for producing radiology reports...
February 21, 2017: Methods of Information in Medicine
https://www.readbyqxmd.com/read/28214249/perceived-neighborhood-social-cohesion-and-preventive-healthcare-use
#7
Eric S Kim, Ichiro Kawachi
INTRODUCTION: Neighborhood social cohesion has been linked with better health and health behaviors, but its association with patterns of preventive healthcare use remains understudied. The hypothesis was that people with higher perceived neighborhood social cohesion would display increased use of preventive healthcare services. METHODS: Participants (N=7,168) were drawn from the 2006 wave of the Health and Retirement Study-a prospective and nationally representative panel study of American adults aged >50 years-and tracked for one wave (2 years)...
February 14, 2017: American Journal of Preventive Medicine
https://www.readbyqxmd.com/read/28199152/can-radiologists-predict-the-presence-of-ductal-carcinoma-in-situ-and-invasive-breast-cancer
#8
Shadi Aminololama-Shakeri, Chris I Flowers, Christine E McLaren, Dorota J Wisner, Jade de Guzman, Joan E Campbell, Lawrence W Bassett, Haydee Ojeda-Fournier, Karen Gerlach, Jonathan Hargreaves, Sarah L Elson, Hanna Retallack, Bonnie N Joe, Stephen A Feig, Colin J Wells
OBJECTIVE: We hypothesize that radiologists' estimated percentage likelihood assessments for the presence of ductal carcinoma in situ (DCIS) and invasive cancer may predict histologic outcomes. MATERIALS AND METHODS: Two hundred fifty cases categorized as BI-RADS category 4 or 5 at four University of California Medical Centers were retrospectively reviewed by 10 academic radiologists with a range of 1-39 years in practice. Readers assigned BI-RADS category (1, 2, 3, 4a, 4b, 4c, or 5), estimated percentage likelihood of DCIS or invasive cancer (0-100%), and confidence rating (1 = low, 5 = high) after reviewing screening and diagnostic mammograms and ultrasound images...
February 15, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28192742/breast-cancer-detection-using-single-reading-of-breast-tomosynthesis-3d-mammography-compared-to-double-reading-of-2d-mammography-evidence-from-a-population-based-trial
#9
Nehmat Houssami, Daniela Bernardi, Marco Pellegrini, Marvi Valentini, Carmine Fantò, Livio Ostillio, Paolina Tuttobene, Andrea Luparia, Petra Macaskill
BACKGROUND: Most population breast cancer (BC) screening programs use double-reading of 2D-mammography. We recently reported the screening with tomosynthesis or standard mammography-2 (STORM-2) trial, showing that double-read tomosynthesis (pseudo-3D-mammography) detected more BC than double-read 2D-mammography. In this study, we compare screen-detection measures for single-reading of 3D-mammography with those for double-reading of 2D-mammography, to inform screening practice. METHODS: This is a secondary analysis based on STORM-2 which prospectively compared 3D-mammography and 2D-mammography in sequential screen-readings...
February 10, 2017: Cancer Epidemiology
https://www.readbyqxmd.com/read/28191461/three-class-mammogram-classification-based-on-descriptive-cnn-features
#10
M Mohsin Jadoon, Qianni Zhang, Ihsan Ul Haq, Sharjeel Butt, Adeel Jadoon
In this paper, a novel classification technique for large data set of mammograms using a deep learning method is proposed. The proposed model targets a three-class classification study (normal, malignant, and benign cases). In our model we have presented two methods, namely, convolutional neural network-discrete wavelet (CNN-DW) and convolutional neural network-curvelet transform (CNN-CT). An augmented data set is generated by using mammogram patches. To enhance the contrast of mammogram images, the data set is filtered by contrast limited adaptive histogram equalization (CLAHE)...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28191357/metastatic-invasive-lobular-breast-cancer-presenting-clinically-with-esophageal-dysphagia
#11
Lilit Karapetyan, Heather Laird-Fick, Reuben Cuison
Background. Intra-abdominal metastases of invasive lobular breast cancer (ILBC) may be insidious. We report a case of metastatic ILBC that presented with dysphagia within weeks of a negative mammogram and before the development of intra-abdominal symptoms. Case. A 70-year-old female developed esophageal dysphagia. She underwent EGD which showed a short segment of stricture of the distal esophagus without significant mucosal changes. Biopsy was unremarkable and patient underwent lower esophageal sphincter (LES) dilation...
2017: Case Reports in Oncological Medicine
https://www.readbyqxmd.com/read/28187373/impact-of-selective-use-of-breast-mri-on-surgical-decision-making-in-women-with-newly-diagnosed-operable-breast-cancer
#12
Meagan E Brennan, Merran McKessar, Kylie Snook, Ian Burgess, Andrew J Spillane
BACKGROUND: This study evaluated the impact of breast MRI on surgical planning in selected cases of breast malignancy (invasive cancer or DCIS). MRI was used when there was ambiguity on clinical and/or conventional imaging assessment. METHODS: Consecutive women with breast malignancy undergoing breast MRI were included. Clinical, mammogram and ultrasound findings and surgical plan before and after MRI were recorded. MRI findings and histopathology results were documented and the impact of MRI on treatment planning was evaluated...
February 7, 2017: Breast: Official Journal of the European Society of Mastology
https://www.readbyqxmd.com/read/28185408/full-field-digital-mammography-is-the-apparent-increased-detection-of-microcalcification-leading-to-over-investigation-and-over-diagnosis
#13
Alan J Porter, Elizabeth B Evans, Lisa M Erzetich
INTRODUCTION: Modern full-field digital mammography (FFDM) appears to have increased the detection of breast microcalcification. This retrospective study aimed to assess whether this is associated with over-investigation and possible over-diagnosis of breast pathology of lesser significance. METHODS: Three 2-year periods were studied, in which different mammographic technologies were used exclusively viz., classical screen-film mammography (SFM) in 2003-04, computed radiography (CR) in 2009-10 and FFDM in 2012-13...
February 9, 2017: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/28183826/impact-of-a-false-positive-screening-mammogram-on-subsequent-screening-behavior-and-stage-at-breast-cancer-diagnosis
#14
Firas M Dabbous, Therese A Dolecek, Michael L Berbaum, Sarah M Friedewald, Wm Thomas Summerfelt, Kent Hoskins, Garth H Rauscher
Background: Experiencing a false positive (FP) screening mammogram is economically, physically, and emotionally burdensome, which may affect future screening behavior by delaying the next scheduled mammogram or by avoiding screening altogether. We sought to examine the impact of a FP screening mammogram on the subsequent screening mammography behavior.Methods: Delay in obtaining subsequent screening was defined as any mammogram performed more than 12 months from index mammogram. The Kaplan-Meier (product limit) estimator and Cox proportional hazards model were used to estimate the unadjusted delay and the hazard ratio (HR) of delay of the subsequent screening mammogram within the next 36 months from the index mammogram date...
February 9, 2017: Cancer Epidemiology, Biomarkers & Prevention
https://www.readbyqxmd.com/read/28177856/change-in-breast-cancer-screening-intervals-since-the-2009-uspstf-guideline
#15
Karen J Wernli, Robert F Arao, Rebecca A Hubbard, Brian L Sprague, Jennifer Alford-Teaster, Jennifer S Haas, Louise Henderson, Deidre Hill, Christoph I Lee, Anna N A Tosteson, Tracy Onega
BACKGROUND: In 2009, the U.S. Preventive Services Task Force (USPSTF) recommended biennial mammography for women aged 50-74 years and shared decision-making for women aged 40-49 years for breast cancer screening. We evaluated changes in mammography screening interval after the 2009 recommendations. MATERIALS AND METHODS: We conducted a prospective cohort study of women aged 40-74 years who received 821,052 screening mammograms between 2006 and 2012 using data from the Breast Cancer Surveillance Consortium...
February 8, 2017: Journal of Women's Health
https://www.readbyqxmd.com/read/28176430/managing-uncertainty-in-the-clinical-prediction-of-risk-of-harm-bringing-a-bayesian-approach-to-forensic-mental-health
#16
Conor Duggan, Roland Jones
Predicting the likelihood of harm posed by mentally disordered offenders remains controversial. It is proposed that a Bayesian approach may help quantify the uncertainty surrounding such prediction. An example of this approach quantifying the risk of breast cancer in the event of a positive mammogram is provided. Copyright © 2017 John Wiley & Sons, Ltd.
February 2017: Criminal Behaviour and Mental Health: CBMH
https://www.readbyqxmd.com/read/28171807/a-deep-learning-approach-for-the-analysis-of-masses-in-mammograms-with-minimal-user-intervention
#17
Neeraj Dhungel, Gustavo Carneiro, Andrew P Bradley
We present an integrated methodology for detecting, segmenting and classifying breast masses from mammograms with minimal user intervention. This is a long standing problem due to low signal-to-noise ratio in the visualisation of breast masses, combined with their large variability in terms of shape, size, appearance and location. We break the problem down into three stages: mass detection, mass segmentation, and mass classification. For the detection, we propose a cascade of deep learning methods to select hypotheses that are refined based on Bayesian optimisation...
January 28, 2017: Medical Image Analysis
https://www.readbyqxmd.com/read/28170371/imaging-tests-in-staging-and-surveillance-of-non-metastatic-breast-cancer-changes-in-routine-clinical-practice-and-cost-implications
#18
S De Placido, C De Angelis, M Giuliano, C Pizzi, R Ruocco, V Perrone, D Bruzzese, G Tommasielli, M De Laurentiis, S Cammarota, G Arpino, G Arpino
BACKGROUND: Although guidelines do not recommend computerised tomography (CT), positron emission tomography (PET) or magnetic resonance imaging (MRI) for the staging or follow-up of asymptomatic patients with non-metastatic breast cancer, they are often requested in routine clinical practice. The aim of this study was to determine the staging and follow-up patterns, and relative costs in a large population of breast cancer patients living and treated in a Southern Italian region. METHODS: We analysed the clinical computerised information recorded by 567 primary-care physicians assisting about 650 000 inhabitants in the Campania region...
February 7, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28161786/quantification-of-masking-risk-in-screening-mammography-with-volumetric-breast-density-maps
#19
Katharina Holland, Carla H van Gils, Ritse M Mann, Nico Karssemeijer
PURPOSE: Fibroglandular tissue may mask breast cancers, thereby reducing the sensitivity of mammography. Here, we investigate methods for identification of women at high risk of a masked tumor, who could benefit from additional imaging. METHODS: The last negative screening mammograms of 111 women with interval cancer (IC) within 12 months after the examination and 1110 selected normal screening exams from women without cancer were used. From the mammograms, volumetric breast density maps were computed, which provide the dense tissue thickness for each pixel location...
February 4, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28160525/automatic-intensity-windowing-of-mammographic-images-based-on-a-perceptual-metric
#20
Alberto Albiol, Alberto Corbi, Francisco Albiol
PURPOSE: Initial auto-adjustment of the window level WL and width WW applied to mammo-graphic images. The proposed intensity windowing (IW) method is based on the maximization of the mutual information (MI) between a perceptual decomposition of the original 12-bit sources and their screen displayed 8-bit version. Besides zoom, color inversion and panning operations, IW is the most commonly performed task in daily screening and has a direct impact on diagnosis and the time involved in the process...
February 4, 2017: Medical Physics
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