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Digital mammography

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https://www.readbyqxmd.com/read/28420325/usefulness-of-grayscale-inverted-images-in-addition-to-standard-images-in-digital-mammography
#1
Ayşegül Altunkeser, M Kazım Körez
BACKGROUND: Mammography is essential for early diagnosis of breast cancer, which is the most common type of cancer in females that is associated with a high mortality rate. We investigated whether evaluation of the grayscale inverted images of mammograms would aid in increasing the diagnostic sensitivity of the mammographic imaging technique. METHODS: Our study included 636 mammograms of 159 women who had undergone digital mammography. Standard, grayscale inverted, and standard plus grayscale inverted images were sequentially examined three times, at 15-day intervals, for the presence or assessment of pathological changes in the skin, calcification, asymmetric density, mass lesions, structural distortions, and intramammary and axillary lymph nodes...
April 18, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28419125/mammographic-compression-in-asian-women
#2
Susie Lau, Yang Faridah Abdul Aziz, Kwan Hoong Ng
OBJECTIVES: To investigate: (1) the variability of mammographic compression parameters amongst Asian women; and (2) the effects of reducing compression force on image quality and mean glandular dose (MGD) in Asian women based on phantom study. METHODS: We retrospectively collected 15818 raw digital mammograms from 3772 Asian women aged 35-80 years who underwent screening or diagnostic mammography between Jan 2012 and Dec 2014 at our center. The mammograms were processed using a volumetric breast density (VBD) measurement software (Volpara) to assess compression force, compression pressure, compressed breast thickness (CBT), breast volume, VBD and MGD against breast contact area...
2017: PloS One
https://www.readbyqxmd.com/read/28411676/synthesized-digital-mammography-imaging
#3
REVIEW
Phoebe E Freer, Nicole Winkler
Synthesized mammography (SM) is a new imaging technique similar to digital mammography constructed from an acquired digital breast tomosynthesis (DBT) examination. SM allows for widespread screening using DBT, maintaining the benefits of DBT while decreasing the radiation of DBT by nearly half. This article reviews studies evaluating SM, most of which suggest that SM may be appropriate to use clinically to replace an actual acquired conventional 2-dimensional full-field digital mammogram (FFDM) when using DBT for breast cancer screening...
May 2017: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/28411675/breast-tomosynthesis-practical-considerations
#4
REVIEW
Sarah M Friedewald
Digital breast tomosynthesis (DBT) is rapidly becoming the new standard of care for breast cancer screening. DBT has improved on the limitations of traditional digital mammography by increasing cancer detection and decreasing false-positive examinations. Interpretation of DBT is slightly different than digital mammography and therefore experience with the technology is paramount to achieve best performance. Examples of malignancies that should be recalled and benign findings that are safely called as benign are provided in this article...
May 2017: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/28410616/breast-masses-in-mammography-classification-with-local-contour-features
#5
Haixia Li, Xianjing Meng, Tingwen Wang, Yuchun Tang, Yilong Yin
BACKGROUND: Mammography is one of the most popular tools for early detection of breast cancer. Contour of breast mass in mammography is very important information to distinguish benign and malignant mass. Contour of benign mass is smooth and round or oval, while malignant mass has irregular shape and spiculated contour. Several studies have shown that 1D signature translated from 2D contour can describe the contour features well. METHODS: In this paper, we propose a new method to translate 2D contour of breast mass in mammography into 1D signature...
April 14, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28398001/an-update-on-carbon-nanotube-enabled-x-ray-sources-for-biomedical-imaging
#6
REVIEW
Connor Puett, Christina Inscoe, Allison Hartman, Jabari Calliste, Dora K Franceschi, Jianping Lu, Otto Zhou, Yueh Z Lee
A new imaging technology has emerged that uses carbon nanotubes (CNT) as the electron emitter (cathode) for the X-ray tube. Since the performance of the CNT cathode is controlled by simple voltage manipulation, CNT-enabled X-ray sources are ideal for the repetitive imaging steps needed to capture three-dimensional information. As such, they have allowed the development of a gated micro-computed tomography (CT) scanner for small animal research as well as stationary tomosynthesis, an experimental technology for large field-of-view human imaging...
April 11, 2017: Wiley Interdisciplinary Reviews. Nanomedicine and Nanobiotechnology
https://www.readbyqxmd.com/read/28391726/determinants-of-percent-mammographic-density-in-women-with-premature-ovarian-insufficiency
#7
F R Torelli, M F Brancalion, D A Yela, C L Benetti-Pinto
OBJECTIVE: To evaluate the determinants of breast density in women with premature ovarian insufficiency (POI). METHODS: In a cross-sectional study of 163 women with POI undergoing mammography, percent mammographic density (PMD) was evaluated by digitizing the image. PMD was correlated with age, age at menarche, age at POI, time since POI, body mass index (BMI), gestational history and hormone therapy (HT) use (duration, dose, regimen). RESULTS: POI was diagnosed at a mean age of 32...
April 9, 2017: Climacteric: the Journal of the International Menopause Society
https://www.readbyqxmd.com/read/28379734/potential-cost-savings-of-contrast-enhanced-digital-mammography
#8
Bhavika K Patel, Richard J Gray, Barbara A Pockaj
OBJECTIVE: The purpose of this article is to discuss whether the sensitivity and specificity of contrast-enhanced digital mammography (CEDM) render it a viable diagnostic alternative to breast MRI. CONCLUSION: That CEDM couples low-energy images (comparable to the diagnostic quality of standard mammography) and subtracted contrast-enhanced mammograms makes it a cost-effective modality for routine screening. CEDM may serve as a realistic substitute for the more costly breast MRI...
April 5, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28378409/diffusion-of-digital-breast-tomosynthesis-among-women-in-primary-care-associations-with-insurance-type
#9
Cheryl R Clark, Tor D Tosteson, Anna N A Tosteson, Tracy Onega, Julie E Weiss, Kimberly A Harris, Jennifer S Haas
Digital breast tomosynthesis (DBT) has shown potential to improve breast cancer screening and diagnosis compared to digital mammography (DM). The FDA approved DBT use in conjunction with conventional DM in 2011, but coverage was approved by CMS recently in 2015. Given changes in coverage policies, it is important to monitor diffusion of DBT by insurance type. This study examined DBT trends and estimated associations with insurance type. From June 2011 to September 2014, DBT use in 22 primary care centers in the Dartmouth -Brigham and Women's Hospital Population-based Research Optimizing Screening through Personalized Regimens research center (PROSPR) was examined among women aged 40-89...
April 4, 2017: Cancer Medicine
https://www.readbyqxmd.com/read/28374502/the-role-of-digital-breast-tomosynthesis-in-the-breast-assessment-clinic-a-review
#10
REVIEW
Suneeta Mall, Sarah Lewis, Patrick Brennan, Jennie Noakes, Claudia Mello-Thoms
Mammography has long been considered as the primary technique in breast cancer detection and assessment. Despite low specificity, mammography has been preferred over other contemporary techniques such as magnetic resonance imaging (MRI), computed tomography (CT) and ultrasonography (US) due to superior sensitivity and significant health economic benefits. The development of a new technique, a limited angle cone beam pseudo-three-dimensional tomosynthesis, digital breast tomosynthesis (DBT), has gained momentum...
April 4, 2017: Journal of Medical Radiation Sciences
https://www.readbyqxmd.com/read/28368663/imaging-features-and-conspicuity-of-invasive-lobular-carcinomas-on-digital-breast-tomosynthesis
#11
Foucauld Chamming's, Ellen Kao, Ann Aldis, Romuald Ferré, Atilla Omeroglu, Caroline Reinhold, Benoit Mesurolle
OBJECTIVES: To review the imaging features of invasive lobular carcinoma (ILC) seen on Digital breast tomosynthesis (DBT) in comparison with invasive ductal carcinoma (IDC), and to evaluate whether DBT could improve conspicuity and tumor size assessment of ILC in comparison with digital mammography (DM). METHODS: Institutional review board with waiver of informed consent was obtained for this retrospective study. Patients with ILC or IDC who underwent DBT and DM at the time of diagnosis were included...
April 3, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28338934/alternative-figures-of-merit-in-digital-mammography
#12
M Borg, A Konstantinidis
The aim of this study is to explore the use of a quality (Q) factor in digital mammography as a figure-of-merit. Q factors take a reference value into account and can be compared to a theoretical value. They are also intended to summarise the performance of any unit based on a number. The mean glandular dose (MGD)-normalised Q factors were also introduced based on the relationship of the Q factors with MGD. Interestingly, the automatic exposure control exposures did not render the maximum normalised Q factor values as expected, which could indicate the need for further optimisation...
March 14, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28338846/patient-exposure-during-plain-radiography-and-mammography-in-japan-in-1974-2014
#13
Yuta Matsunaga, Ai Kawaguchi, Kenichi Kobayashi, Masanao Kobayashi, Yasuki Asada, Kazuyuki Minami, Shoichi Suzuki, Koichi Chida
We investigated changes in the entrance skin dose (ESD) and the mean glandular dose (MGD) during plain radiography or mammography in Japan from 1974 to 2014. Surveys regarding the conditions used for plain radiography and mammography were performed throughout Japan in 1974, 1979, 1989, 1993, 1997, 2001, 2003, 2007, 2011 and 2014. The anatomical regions considered were categorised as follows: skull anteroposterior (AP), lumbar AP, lumbar lateral (LAT), pelvis (AP), ankle, chest posteroanterior (PA), Guthmann (lateral pelviography for pregnant women), infant hip joint and mammography...
March 1, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28335472/detecting-breast-cancer-with-a-dual-modality-device
#14
Kamila Padia, Tania S Douglas, Lydia L Cairncross, Roland V Baasch, Christopher L Vaughan
Although mammography has been the gold standard for the early detection of breast cancer, if a woman has dense breast tissue, a false negative diagnosis may occur. Breast ultrasound, whether hand-held or automated, is a useful adjunct to mammography but adds extra time and cost. The primary aim was to demonstrate that our second-generation Aceso system, which combines full-field digital mammography (FFDM) and automated breast ultrasound (ABUS) in a single platform, is able to produce improved quality images that provide clinically meaningful results...
March 18, 2017: Diagnostics
https://www.readbyqxmd.com/read/28318506/assessment-of-disease-extent-on-contrast-enhanced-mri-in-breast-cancer-detected%C3%A2-at-digital-breast-tomosynthesis-versus%C3%A2-digital-mammography-alone
#15
A V Chudgar, E F Conant, S P Weinstein, B M Keller, M Synnestvedt, P Yamartino, E S McDonald
AIM: To compare the utility of breast magnetic resonance imaging (MRI) in determining the extent of disease in patients with newly diagnosed breast cancer detected on combination digital breast tomosynthesis (DBT) versus digital screening mammography (DM). MATERIALS AND METHODS: Review of 24,563 DBT-screened patients and 10,751 DM-screened patients was performed. Two hundred and thirty-five DBT patients underwent subsequent MRI examinations; 82 to determine extent of disease after newly diagnosed breast cancer...
March 16, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28303582/generation-and-analysis-of-clinically-relevant-breast-imaging-x-ray-spectra
#16
Andrew M Hernandez, J Anthony Seibert, Anita Nosratieh, John M Boone
PURPOSE: The purpose of this work was to develop and make available x-ray spectra for some of the most widely used digital mammography (DM), breast tomosynthesis (BT), and breast CT (bCT) systems in North America. METHODS: The Monte Carlo code MCNP6 was used to simulate minimally-filtered (only beryllium) x-ray spectra at 8 tube potentials from 20 to 49 kV for DM/BT, and 9 tube potentials from 35 to 70 kV for bCT. Vendor-specific anode compositions, effective anode angles, focal spot sizes, source-to-detector distances, and beryllium filtration were simulated...
March 17, 2017: Medical Physics
https://www.readbyqxmd.com/read/28303553/overview-of-the-radiographers-practice-in-65-healthcare-centers-using-digital-mammography-systems-in-portugal
#17
Cláudia Sá Dos Reis, Ana Pascoal, Lucian Radu, Mário Fartaria de Oliveira, João Alves
PURPOSE: To assess current practices in digital mammography (DM) in Portuguese healthcare providers using digital systems. To investigate compliance with European standards regarding mean glandular dose and quality control practice and to identify optimisation needs. METHODS: Two questionnaires, targeted at breast radiographers and chief radiographers, were designed and applied in 65 imaging departments offering DM. Questions fielded were focused on the staff profile and technical/clinical practice...
March 16, 2017: Insights Into Imaging
https://www.readbyqxmd.com/read/28298592/full-field-digital-mammography-and-digital-breast-tomosynthesis
#18
Marlene M Johnson
Innovation in breast imaging techniques is leading to better breast cancer detection. Concurrently, breast cancer screening recommendations are changing, and breast density is becoming a more significant factor in breast cancer screening. Digital mammography has become the preferred screening method, with more breast imaging centers including the use of digital breast tomosynthesis (DBT). The technology's role in breast imaging has not been clarified fully, and several clinical trials are addressing DBT. This article presents research findings on digital mammography and DBT and explores the future role of 3-D breast imaging...
January 2017: Radiologic Technology
https://www.readbyqxmd.com/read/28291738/design-and-validation-of-realistic-breast-models-for-use-in-multiple-alternative-forced-choice-virtual-clinical-trials
#19
Premkumar Elangovan, Alistair Mackenzie, David R Dance, Kenneth C Young, Victoria Cooke, Louise Wilkinson, Rosalind M Given-Wilson, Matthew G Wallis, Kevin Wells
A novel method has been developed for generating quasi-realistic voxel phantoms which simulate the compressed breast in mammography and digital breast tomosynthesis (DBT). The models are suitable for use in virtual clinical trials requiring realistic anatomy which use the multiple alternative forced choice (AFC) paradigm and patches from the complete breast image. The breast models are produced by extracting features of breast tissue components from DBT clinical images including skin, adipose and fibro-glandular tissue, blood vessels and Cooper's ligaments...
April 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28290336/mammographic-image-reject-rate-analysis-and-cause-a-national-maltese-study
#20
N Mercieca, J L Portelli, H Jadva-Patel
Mammography is used as a first-line investigation in the detection of breast cancer and imaging is required to be of optimal quality and achieved without adverse effects on the health of individuals. Repeated images come at a cost in terms of radiation dose, discomfort to clients and unnecessary financial burdens. No studies investigating mammography quality in Malta had been previously undertaken. Hence, this research aimed to investigate whether mammography is being performed at an acceptable level, through the investigation of reject rates...
February 2017: Radiography
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