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https://www.readbyqxmd.com/read/28543761/experimental-characterization-of-a-direct-conversion-amorphous-selenium-detector-with-thicker-conversion-layer-for-dual-energy-contrast-enhanced-breast-imaging
#1
David A Scadutom, Olivier Tousignant, Wei Zhao
PURPOSE: Dual-energy contrast-enhanced imaging is being investigated as a tool to identify and localize angiogenesis in the breast, a possible indicator of malignant tumors. This imaging technique requires that x-ray images are acquired at energies above the k-shell binding energy of an appropriate radiocontrast agent. Iodinated contrast agents are commonly used for vascular imaging, and require x-ray energies greater than 33 keV. Conventional direct conversion amorphous selenium (a-Se) flat panel imagers for digital mammography show suboptimal absorption efficiencies at these higher energies...
May 21, 2017: Medical Physics
https://www.readbyqxmd.com/read/28540564/digital-breast-tomosynthesis-dbt-recommendations-from-the-italian-college-of-breast-radiologists-icbr-by-the-italian-society-of-medical-radiology-sirm-and-the-italian-group-for-mammography-screening-gisma
#2
Daniela Bernardi, Paolo Belli, Eva Benelli, Beniamino Brancato, Lauro Bucchi, Massimo Calabrese, Luca A Carbonaro, Francesca Caumo, Beatrice Cavallo-Marincola, Paola Clauser, Chiara Fedato, Alfonso Frigerio, Vania Galli, Livia Giordano, Paolo Giorgi Rossi, Paola Golinelli, Doralba Morrone, Giovanna Mariscotti, Laura Martincich, Stefania Montemezzi, Carlo Naldoni, Adriana Paduos, Pietro Panizza, Federica Pediconi, Fiammetta Querci, Antonio Rizzo, Gianni Saguatti, Alberto Tagliafico, Rubina M Trimboli, Marco Zappa, Chiara Zuiani, Francesco Sardanelli
This position paper, issued by ICBR/SIRM and GISMa, summarizes the evidence on DBT and provides recommendations for its use. In the screening setting, DBT in adjunct to digital mammography (DM) increased detection rate by 0.5-2.7‰ and decreased false positives by 0.8-3.6% compared to DM alone in observational and double-testing experimental studies. The reduction in recall rate could be less prominent in those screening programs which already have low recall rates with DM. The increase in radiation exposure associated with DM/DBT protocols has been solved by the introduction of synthetic mammograms (sDM) reconstructed from DBT datasets...
May 25, 2017: La Radiologia Medica
https://www.readbyqxmd.com/read/28535623/-the-breast-cancer-diagnosis-accuracy-of-the-digital-breast-tomosynthesis-technique
#3
H W Zhang, J T Li, M H Lü, L Qin, L F Li, S D Cui, H Liu
Objective: To explore the Digital breast tomosynthesis technique (DBT) in breast cancer diagnosis accuracy. Methods: Choose 263 cases of patients with breast lesions, using DBT combined FFDM (Full field digital mammography) independent FFDM, evaluate the diagnostic accuracy of breast cancer. Results: The ROC curve area (AUC) of two kinds of breast cancer diagnosis methods (DBT combined FFDM and independent FFDM) were 0.954±0.014 and 0.907±0.019, with significant difference (P=0.000 3). In premenopausal patients and breast density ACR3-4 cases, DBT combined FFDM diagnosis accuracy is higher than FFDM alone group, with significant difference (P<0...
May 16, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28530138/review-and-management-of-breast-lesions-detected-with-breast-tomosynthesis-but-not-visible-on-mammography-and-ultrasonography
#4
Fusun Taskin, Yasemin Durum, Aykut Soyder, Alparslan Unsal
Background Breast tomosynthesis is more sensitive than mammography and can detect lesions that are not always visible with conventional methods such as digital mammography (MG) and ultrasonography (US). No standardized approach is available for the management of lesions that are detectable with tomosynthesis but are not visible on MG or US. Purpose To review suspicious breast lesions detected with tomosynthesis but not visible on two-dimensional (2D) MG or US and to determine the management options for these lesions...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28526511/looking-for-a-needle-in-a-haystack-the-importance-of-having-optimal-display-luminance-level-for-breast-cancer-detection-on-digital-breast-tomosynthesis
#5
EDITORIAL
Sophie Paquerault, Renée M Howell
No abstract text is available yet for this article.
May 16, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28523569/effect-of-age-on-breast-cancer-screening-using-tomosynthesis-in-combination-with-digital-mammography
#6
Elizabeth A Rafferty, Stephen L Rose, Dave P Miller, Melissa A Durand, Emily F Conant, Debra S Copit, Sarah M Friedewald, Donna M Plecha, Ingrid L Ott, Mary K Hayes, Kara L Carlson, Thomas M Cink, Lora D Barke, Linda N Greer, Loren T Niklason
PURPOSE: To determine the effect of tomosynthesis imaging as a function of age for breast cancer screening. METHODS: Screening performance metrics from 13 institutions were examined for 12 months prior to introduction of tomosynthesis (period 1) and compared to those after introduction of tomosynthesis (period 2, range 3-22 months). Screening metrics for women ages 40-49, 50-59, 60-69, and 70+ , included rates per 1000 screens for recalls, biopsies, cancers, and invasive cancers detected...
May 18, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28516226/benefit-of-adding-digital-breast-tomosynthesis-to-digital-mammography-for-breast-cancer-screening-focused-on-cancer-characteristics-a-meta-analysis
#7
REVIEW
Seong Jong Yun, Chang-Woo Ryu, Sun Jung Rhee, Jung Kyu Ryu, Ji Young Oh
PURPOSE: We evaluated the benefit of adding digital breast tomosynthesis (DBT) to full-field digital mammography (FFDM) compared to FFDM alone for breast cancer detection, focusing on cancer characteristics. METHODS: We searched electronic databases and relevant references for published studies comparing DBT plus FFDM to FFDM alone for breast cancer screening. Pooled risk ratios (RRs) for various pathologic findings were determined using random effects models. RESULTS: Eleven eligible studies were included...
May 18, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28504593/comparison-between-digital-and-synthetic-2d-mammograms-in-breast-density-interpretation
#8
Taghreed I Alshafeiy, Antoine Wadih, Brandi T Nicholson, Carrie M Rochman, Heather R Peppard, James T Patrie, Jennifer A Harvey
OBJECTIVE: The purpose of this study was to compare assessments of breast density on synthetic 2D images as compared with digital 2D mammograms. MATERIALS AND METHODS: This retrospective study included consecutive women undergoing screening with digital 2D mammography and tomosynthesis during May 2015 with a negative or benign outcome. In separate reading sessions, three radiologists with 5-25 years of clinical experience and 1 year of experience with synthetic 2D mammography read digital 2D and synthetic 2D images and assigned breast density categories according to the 5th edition of BI-RADS...
May 15, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28483356/evaluation-of-a-breast-software-model-for-2d-and-3d-x-ray-imaging-studies-of-the-breast
#9
Yanka Baneva, Kristina Bliznakova, Lesley Cockmartin, Stoyko Marinov, Ivan Buliev, Giovanni Mettivier, Hilde Bosmans, Paolo Russo, Nicholas Marshall, Zhivko Bliznakov
INTRODUCTION: In X-ray imaging, test objects reproducing breast anatomy characteristics are realized to optimize issues such as image processing or reconstruction, lesion detection performance, image quality and radiation induced detriment. Recently, a physical phantom with a structured background has been introduced for both 2D mammography and breast tomosynthesis. A software version of this phantom and a few related versions are now available and a comparison between these 3D software phantoms and the physical phantom will be presented...
May 5, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28473081/acr-appropriateness-criteria-%C3%A2-breast%C3%A2-pain
#10
Peter M Jokich, Lisa Bailey, Carl D'Orsi, Edward D Green, Anna I Holbrook, Su-Ju Lee, Ana P Lourenco, Martha B Mainiero, Linda Moy, Karla A Sepulveda, Priscilla J Slanetz, Sunita Trikha, Monica M Yepes, Mary S Newell
Breast pain (or tenderness) is a common symptom, experienced by up to 80% of women at some point in their lives. Fortunately, it is rarely associated with breast cancer. However, breast pain remains a common cause of referral for diagnostic breast imaging evaluation. Appropriate workup depends on the nature and focality of the pain, as well as the age of the patient. Imaging evaluation is usually not indicated if the pain is cyclic or nonfocal. For focal, noncyclic pain, imaging may be appropriate, mainly for reassurance and to identify treatable causes...
May 2017: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/28473070/acr-appropriateness-criteria-%C3%A2-evaluation-of-nipple-discharge
#11
Su-Ju Lee, Sunita Trikha, Linda Moy, Paul Baron, Roberta M diFlorio, Edward D Green, Samantha L Heller, Anna I Holbrook, Alana A Lewin, Ana P Lourenco, Bethany L Niell, Priscilla J Slanetz, Ashley R Stuckey, Nina S Vincoff, Susan P Weinstein, Monica M Yepes, Mary S Newell
Appropriate imaging evaluation of nipple discharge depends the nature of the discharge. Imaging is not indicated for women with physiologic nipple discharge. For evaluation of pathologic nipple discharge, multiple breast imaging modalities are rated for evidence-based appropriateness under various scenarios. For women age 40 or older, mammography or digital breast tomosynthesis (DBT) should be the initial examination. Ultrasound is usually added as a complementary examination, with some exceptions. For women age 30 to 39, either mammogram or ultrasound may be used as the initial examination on the basis of institutional preference...
May 2017: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/28469438/visualization-of-breast-microcalcifications-on-digital-breast-tomosynthesis-and-2-dimensional-digital-mammography-using-specimens
#12
Jieun Byun, Jee Eun Lee, Eun Suk Cha, Jin Chung, Jeoung Hyun Kim
PURPOSE: The purpose of this study is to compare the visibility of microcalcifications of digital breast tomosynthesis (DBT) and full-field digital mammography (FFDM) using breast specimens. MATERIALS AND METHODS: Thirty-one specimens' DBT and FFDM were retrospectively reviewed by four readers. RESULTS: The image quality of microcalcifications of DBT was rated as superior or equivalent in 71.0% by reader 1, 67.8% by reader 2, 64.5% by reader 3, and 80...
2017: Breast Cancer: Basic and Clinical Research
https://www.readbyqxmd.com/read/28463546/imaging-with-synthesized-2d-mammography-differences-advantages-and-pitfalls-compared-with-digital-mammography
#13
Samantha P Zuckerman, Andrew D A Maidment, Susan P Weinstein, Elizabeth S McDonald, Emily F Conant
OBJECTIVE: Synthesized 2D (s2D) mammography is rapidly replacing digital mammography in breast imaging with digital breast tomosynthesis (DBT) to reduce radiation dose and maintain screening outcomes. We illustrate variations in the appearance of s2D and digital mammograms to aid in implementation of this technology. CONCLUSION: Despite subjective differences in the appearance of s2D and digital mammograms, early outcomes of screening using s2D mammography and DBT are not inferior to those achieved with digital mammography and DBT...
May 2, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28454640/the-advantage-of-digital-tomosynthesis-for-pulmonary-nodule-detection-concerning-influence-of-nodule-location-and-size-a-phantom-study
#14
E Y Kim, A B Bista, T Kim, S Y Park, K J Park, D K Kang, J S Sun
AIM: To investigate the advantage of digital tomosynthesis (DTS) over chest radiography (CXR) and dual-energy subtraction radiography (DES) for pulmonary nodule detection according to the location and size of solid simulated pulmonary nodules (SPNs). MATERIALS AND METHODS: Ninety-six SPNs of variable sizes were inserted into eight different regions of a lung phantom. These regions were further classified into two groups of danger and non-danger zones based on anatomical location influencing the detection of pulmonary nodules...
April 25, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28449625/clinical-study-of-orthogonal-view-phase-matched-digital-tomosynthesis-for-lung-tumor-localization
#15
You Zhang, Lei Ren, Irina Vergalasova, Fang-Fang Yin
BACKGROUND AND PURPOSE: Compared to cone-beam computed tomography, digital tomosynthesis imaging has the benefits of shorter scanning time, less imaging dose, and better mechanical clearance for tumor localization in radiation therapy. However, for lung tumors, the localization accuracy of the conventional digital tomosynthesis technique is affected by the lack of depth information and the existence of lung tumor motion. This study investigates the clinical feasibility of using an orthogonal-view phase-matched digital tomosynthesis technique to improve the accuracy of lung tumor localization...
January 1, 2017: Technology in Cancer Research & Treatment
https://www.readbyqxmd.com/read/28447102/multimodal-breast-cancer-imaging-using-coregistered-dynamic-diffuse-optical-tomography-and-digital-breast-tomosynthesis
#16
Bernhard B Zimmermann, Bin Deng, Bhawana Singh, Mark Martino, Juliette Selb, Qianqian Fang, Amir Y Sajjadi, Jayne Cormier, Richard H Moore, Daniel B Kopans, David A Boas, Mansi A Saksena, Stefan A Carp
No abstract text is available yet for this article.
April 1, 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/28441367/imaging-management-of-breast-density-a-controversial-risk-factor-for-breast-cancer
#17
Shannon Falcon, Angela Williams, Jared Weinfurtner, Jennifer S Drukteinis
BACKGROUND: Breast density is well recognized as an independent risk factor for the development of breast cancer. However, the magnitude of risk is controversial. As the public becomes increasingly aware of breast density as a risk factor, legislation and notification laws in relation to breast density have become common throughout the United States. Awareness of breast density as a risk factor for breast cancer presents new challenges for the clinician in the approach to the management and screening of women with dense breasts...
April 2017: Cancer Control: Journal of the Moffitt Cancer Center
https://www.readbyqxmd.com/read/28439521/dynamic-electronic-collimation-method-for-3-d-catheter-tracking-on-a-scanning-beam-digital-x-ray-system
#18
David A P Dunkerley, Jordan M Slagowski, Tobias Funk, Michael A Speidel
Scanning-beam digital x-ray (SBDX) is an inverse geometry x-ray fluoroscopy system capable of tomosynthesis-based 3-D catheter tracking. This work proposes a method of dose-reduced 3-D catheter tracking using dynamic electronic collimation (DEC) of the SBDX scanning x-ray tube. This is achieved through the selective deactivation of focal spot positions not needed for the catheter tracking task. The technique was retrospectively evaluated with SBDX detector data recorded during a phantom study. DEC imaging of a catheter tip at isocenter required 340 active focal spots per frame versus 4473 spots in full field-of-view (FOV) mode...
April 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28436856/task-based-modeling-of-an-5k-ultra-high-resolution-medical-imaging-system-for-digital-breast-tomosynthesis
#19
Chumin Zhao, Jerzy Kanicki
High-resolution, low noise x-ray detectors based on CMOS active pixel sensor (APS) technology have demonstrated superior imaging performance for digital breast tomosynthesis (DBT). This paper presents a task-based model for a high resolution medical imaging system to evaluate its ability to detect simulated microcalcifications and masses as lesions for breast cancer. Three-dimensional (3D) cascaded system analysis for a 50 μm pixel pitch CMOS APS x-ray detector was integrated with an object task function, a medical imaging display model, and the human eye contrast sensitivity function to calculate the detectability index and area under the ROC curve (AUC)...
April 19, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28429205/comparison-of-digital-tomosynthesis-and-computed-tomography-for-lung-nodule-detection-in-sos-screening-program
#20
Maurizio Grosso, Roberto Priotto, Donatella Ghirardo, Alberto Talenti, Emanuele Roberto, Luca Bertolaccini, Alberto Terzi, Stéphane Chauvie
PURPOSE: To compare the lung nodules' detection of digital tomosynthesis (DTS) and computed tomography (CT) in the context of the SOS (Studio OSservazionale) prospective screening program for lung cancer detection. MATERIALS AND METHODS: One hundred and thirty-two of the 1843 subjects enrolled in the SOS study underwent CT because non-calcified nodules with diameters larger than 5 mm and/or multiple nodules were present in DTS. Two expert radiologists reviewed the exams classifying the nodules based on their radiological appearance and their dimension...
April 20, 2017: La Radiologia Medica
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