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https://www.readbyqxmd.com/read/28343304/geometry-calibration-between-x-ray-source-and-detector-for-tomosynthesis-with-a-portable-x-ray-system
#1
Kohei Sato, Takashi Ohnishi, Masashi Sekine, Hideaki Haneishi
PURPOSE: Tomosynthesis is attracting attention as a low-dose tomography technology compared with X-ray CT. However, conventional tomosynthesis imaging devices are large and stationary. Furthermore, there is a limitation in the working range of the X-ray source during image acquisition. We have previously proposed the use of a portable X-ray device for tomosynthesis that can be used for ward rounds and emergency medicine. The weight of this device can be reduced by using a flat panel detector (FPD), and flexibility is realized by the free placement of the X-ray source and FPD...
March 25, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28340518/prevalence-and-distribution-of-sesamoid-bones-in-the-hand-determined-using-digital-tomosynthesis
#2
Bon San Koo, Yoonah Song, Yoon-Kyoung Sung, Seunghun Lee, Jae-Bum Jun
The aim of this study was to identify the prevalence and distribution of sesamoid bones in the hand using digital tomosynthesis (DTS) in comparison to previous studies. Using conventional radiography (CR) and DTS, hand images (81 left and 100 right) taken at a tertiary hospital were retrospectively reviewed. The sesamoid bones were identified in the interphalangeal (IP) and metacarpophalangeal (MCP) joints of the thumb (I), and in the distal interphalangeal (DIP) and metacarpophalangeal (MCP) of index (II), middle (III), ring (IV), and little (V) fingers...
March 24, 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/28331239/evaluation-of-a-marker-clip-system-in-sonographically-guided-core-needle-biopsy-for-breast-cancer-localization-before-and-after-neoadjuvant-chemotherapy
#3
R Schulz-Wendtland, P Dankerl, M R Bani, P A Fasching, K Heusinger, M P Lux, S M Jud, C Rauh, C M Bayer, M G Schrauder, M W Beckmann, M Uder, B Brehm, C R Loehberg
Introduction The placement of intramammary marker clips has proven to be helpful for tumor localization in patients undergoing neoadjuvant chemotherapy and breast-conserving surgery. The purpose of our study was to investigate the feasibility of using a clip marker system for breast cancer localization and its influence on the imaging assessment of treatment responses after neoadjuvant chemotherapy. Patients and Methods Between March and June 2015, a total of 25 patients (n = 25), with a suspicion of invasive breast cancer with diameters of at least 2 cm (cT2), underwent preoperative sonographically guided core needle biopsy using a single-use breast biopsy system (HistoCore™) and intramammary clip marking using a directly adapted clip system based on the established O-Twist Marker™, before their scheduled preoperative neoadjuvant chemotherapy...
February 2017: Geburtshilfe und Frauenheilkunde
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
#4
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
#5
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/28298592/full-field-digital-mammography-and-digital-breast-tomosynthesis
#6
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
#7
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/28287917/does-reader-performance-with-digital-breast-tomosynthesis-vary-according-to-experience-with-two-dimensional-mammography
#8
Lorraine Tucker, Fiona J Gilbert, Susan M Astley, Amanda Dibden, Archana Seth, Juliet Morel, Sara Bundred, Janet Litherland, Herman Klassen, Gerald Lip, Hema Purushothaman, Hilary M Dobson, Linda McClure, Philippa Skippage, Katherine Stoner, Caroline Kissin, Ursula Beetles, Yit Yoong Lim, Emma Hurley, Jane Goligher, Rumana Rahim, Tanja J Gagliardi, Tamara Suaris, Stephen W Duffy
Purpose To assess whether individual reader performance with digital breast tomosynthesis (DBT) and two-dimensional (2D) mammography varies with number of years of experience or volume of 2D mammograms read. Materials and Methods After written informed consent was obtained, 8869 women (age range, 29-85 years; mean age, 56 years) were recruited into the TOMMY trial (A Comparison of Tomosynthesis with Digital Mammography in the UK National Health Service Breast Screening Program), an ethically approved, multicenter, multireader, retrospective reading study, between July 2011 and March 2013...
March 13, 2017: Radiology
https://www.readbyqxmd.com/read/28268510/simplified-computer-aided-detection-scheme-of-microcalcification-clusters-in-digital-breast-tomosynthesis-images
#9
Ji-Wook Jeong, Seung-Hoon Chae, Eun Young Chae, Hak Hee Kim, Young Wook Choi, Sooyeul Lee
A computer-aided detection (CADe) algorithm for clustered microcalcifications (MCs) in reconstructed digital breast tomosynthesis (DBT) images is suggested. The MC-like objects were enhanced by a Hessian-based 3D calcification response function, and a signal-to-noise ratio (SNR) enhanced image was also generated to screen the MC clustering seed objects. A connected component segmentation method was used to detect the cluster seed objects, which were considered as potential clustering centers of MCs. Bounding cubes for the accepted clustering seed candidate were generated and the overlapping cubes were combined and examined...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28252233/with-the-advent-of-tomosynthesis-in-the-workup-of-mammographic-abnormality-is-spot-compression-mammography-now-obsolete-an-initial-clinical-experience
#10
Neasa Ni Mhuircheartaigh, Louise Coffey, Hannah Fleming, Ann O' Doherty, Sorcha McNally
To determine if the routine use of spot compression mammography is now obsolete in the assessment of screen detected masses, asymmetries and architectural distortion since the availability of digital breast tomosynthesis. We introduced breast tomosynthesis in the workup of screen detected abnormalities in our screening center in January 2015. During an initial learning period with tomosynthesis standard spot compression views were also performed. Three consultant breast radiologists retrospectively reviewed all screening mammograms recalled for assessment over the first 6-month period...
March 2, 2017: Breast Journal
https://www.readbyqxmd.com/read/28244109/improvements-of-an-objective-model-of-compressed-breasts-undergoing-mammography-generation-and-characterization-of-breast-shapes
#11
Alejandro Rodríguez-Ruiz, Steve Si Jia Feng, Jan van Zelst, Suzan Vreemann, Jessica Rice Mann, Carl Joseph D'Orsi, Ioannis Sechopoulos
PURPOSE: To develop a set of accurate 2D models of compressed breasts undergoing mammography or breast tomosynthesis, based on objective analysis, to accurately characterize mammograms with few linearly independent parameters, and to generate novel clinically realistic paired cranio-caudal (CC) and medio-lateral oblique (MLO) views of the breast. METHODS: We seek to improve on an existing model of compressed breasts by overcoming detector size bias, removing the nipple and non-mammary tissue, pairing the CC and MLO views from a single breast, and incorporating the pectoralis major muscle contour into the model...
February 28, 2017: Medical Physics
https://www.readbyqxmd.com/read/28236032/erratum-to-diagnostic-performance-of-tomosynthesis-and-breast-ultrasonography-in-women-with-dense-breasts-a-prospective-comparison-study
#12
Won Hwa Kim, Jung Min Chang, Joongyub Lee, A Jung Chu, Mirinae Seo, Hye Mi Gweon, Hye Ryoung Koo, Su Hyun Lee, Nariya Cho, Min Sun Bae, Sung Ui Shin, Sung Eun Song, Woo Kyung Moon
No abstract text is available yet for this article.
February 24, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28226684/simplified-computer-aided-detection-scheme-of-microcalcification-clusters-in-digital-breast-tomosynthesis-images
#13
Ji-Wook Jeong, Seung-Hoon Chae, Eun Young Chae, Hak Hee Kim, Young Wook Choi, Sooyeul Lee, Ji-Wook Jeong, Seung-Hoon Chae, Eun Young Chae, Hak Hee Kim, Young Wook Choi, Sooyeul Lee, Sooyeul Lee, Ji-Wook Jeong, Hak Hee Kim, Eun Young Chae, Young Wook Choi, Seung-Hoon Chae
A computer-aided detection (CADe) algorithm for clustered microcalcifications (MCs) in reconstructed digital breast tomosynthesis (DBT) images is suggested. The MC-like objects were enhanced by a Hessian-based 3D calcification response function, and a signal-to-noise ratio (SNR) enhanced image was also generated to screen the MC clustering seed objects. A connected component segmentation method was used to detect the cluster seed objects, which were considered as potential clustering centers of MCs. Bounding cubes for the accepted clustering seed candidate were generated and the overlapping cubes were combined and examined...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28221238/additional-magnetic-resonance-imaging-detected-suspicious-lesions-in-known-patients-with-breast-cancer-comparison-of-second-look-digital-tomosynthesis-and-ultrasonography
#14
Jieun Koh, Eun-Kyung Kim, Min Jung Kim, Jung Hyun Yoon, Hee Jung Moon
PURPOSE: The aim of the study was to compare the performances of second-look digital breast tomosynthesis (DBT) and ultrasonography (US) for additional magnetic resonance imaging (MRI)-detected suspicious lesions in patients referred for breast cancer. METHODS: Fifty-five patients (52.5 [9.3] years) with breast cancers newly diagnosed at a referring hospital underwent MRI and afterward DBT and US in our institution. The frequency for detecting additional MRI-detected suspicious lesions on DBT and US and performances of DBT and US were compared...
February 18, 2017: Ultrasound Quarterly
https://www.readbyqxmd.com/read/28221096/clinical-performance-of-synthesized-two-dimensional-mammography-combined-with-tomosynthesis-in-a-large-screening-population
#15
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...
April 2017: Radiology
https://www.readbyqxmd.com/read/28214227/automated-breast-density-computation-in-digital-mammography-and-digital-breast-tomosynthesis-influence-on-mean-glandular-dose-and-birads-density-categorization
#16
Maria Castillo-García, Margarita Chevalier, Julia Garayoa, Alejandro Rodriguez-Ruiz, Diego García-Pinto, Julio Valverde
RATIONALE AND OBJECTIVES: The study aimed to compare the breast density estimates from two algorithms on full-field digital mammography (FFDM) and digital breast tomosynthesis (DBT) and to analyze the clinical implications. MATERIALS AND METHODS: We selected 561 FFDM and DBT examinations from patients without breast pathologies. Two versions of a commercial software (Quantra 2D and Quantra 3D) calculated the volumetric breast density automatically in FFDM and DBT, respectively...
February 14, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28211806/digital-breast-tomosynthesis-plus-mammography-magnetic-resonance-imaging-plus-mammography-and-mammography-alone-a-comparison-of-diagnostic-performance-in-symptomatic-women
#17
Wei Tang, Fei-Xiang Hu, Hui Zhu, Qi-Feng Wang, Ya-Jia Gu, Wei-Jun Peng
PURPOSE: To compare the diagnostic efficiency of digital breast tomosynthesis (DBT) plus digital mammography (DM) and magnetic resonance imaging (MRI) plus DM in symptomatic women. MATERIALS AND METHODS: The protocol used in our study was accepted by the ethics committee at our hospital, and informed consent was obtained from all patients. Between June and December 2014, 197 patients with 238 histologically proven lesions all underwent DM, DBT and MRI. Two radiologists were responsible for interpreting all images according to the Breast Imaging Reporting and Data System (BI-RADS)...
February 17, 2017: Clinical Hemorheology and Microcirculation
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
#18
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/28188043/digital-breast-tomosynthesis-practice-patterns-following-2011-fda-approval-a-survey-of-breast-imaging-radiologists
#19
Yiming Gao, James S Babb, Hildegard K Toth, Linda Moy, Samantha L Heller
RATIONALE AND OBJECTIVES: To evaluate uptake, patterns of use, and perception of digital breast tomosynthesis (DBT) among practicing breast radiologists. MATERIALS AND METHODS: Institutional Review Board exemption was obtained for this Health Insurance Portability and Accountability Act-compliant electronic survey, sent to 7023 breast radiologists identified via the Radiological Society of North America database. Respondents were asked of their geographic location and practice type...
February 7, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28177646/digital-breast-tomosynthesis-cost-effectiveness-of-using-private-and-medicare-insurance-in-community-based-health-care-facilities
#20
Sara A Hunter, Colleen Morris, Karl Nelson, Brandon J Snyder, Thomas B Poulton
OBJECTIVE: The purpose of this study was to determine whether digital breast tomosynthesis (DBT) is a cost-effective alternative to full-field digital mammography (FFDM) for both Medicare and privately insured patients undergoing screening mammography. MATERIALS AND METHODS: A retrospective data analysis was performed between July 15, 2013, and July 14, 2014, with data on women presenting for screening mammography that included any additional radiologic workup (n = 6319)...
February 8, 2017: AJR. American Journal of Roentgenology
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