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https://www.readbyqxmd.com/read/29047034/quantitative-volumetric-k-means-cluster-segmentation-of-fibroglandular-tissue-and-skin-in-breast-mri
#1
Anton Niukkanen, Otso Arponen, Aki Nykänen, Amro Masarwah, Anna Sutela, Timo Liimatainen, Ritva Vanninen, Mazen Sudah
Mammographic breast density (MBD) is the most commonly used method to assess the volume of fibroglandular tissue (FGT). However, MRI could provide a clinically feasible and more accurate alternative. There were three aims in this study: (1) to evaluate a clinically feasible method to quantify FGT with MRI, (2) to assess the inter-rater agreement of MRI-based volumetric measurements and (3) to compare them to measurements acquired using digital mammography and 3D tomosynthesis. This retrospective study examined 72 women (mean age 52...
October 18, 2017: Journal of Digital Imaging: the Official Journal of the Society for Computer Applications in Radiology
https://www.readbyqxmd.com/read/29036067/analyzing-visual-search-observers-using-eye-tracking-data-for-digital-breast-tomosynthesis-images
#2
Zhengqiang Jiang, Mini Das, Howard C Gifford
Visual-search (VS) model observers have the potential to provide reliable predictions of human-observer performance in detection-localization tasks. The purpose of this work was to examine some characteristics of human gaze on breast images with the goal of informing the design of our VS observers. Using a helmet-mounted eye-tracking system, we recorded the movement of gaze from human observers as they searched for masses in sets of 2D digital breast tomosynthesis (DBT) images. The masses in this study were of a single profile...
June 1, 2017: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
https://www.readbyqxmd.com/read/28994663/system-geometry-optimization-for-molecular-breast-tomosynthesis-with-focusing-multi-pinhole-collimators
#3
Jarno van Roosmalen, Freek J Beekman, Marlies C Goorden
Imaging of Tc-99m labelled tracers is gaining popularity for detecting breast tumours. Recently, we proposed a novel design for molecular breast tomosynthesis (MBT) based on two sliding focusing multi-pinhole collimators that scan a modestly compressed breast. Simulation studies indicate that MBT has the potential to improve the tumour-to-background contrast-to-noise ratio significantly over state-of-the-art planar molecular breast imaging. The aim of the present paper is to optimize the collimator-detector geometry of MBT...
October 10, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28991557/screening-for-breast-cancer
#4
REVIEW
Bethany L Niell, Phoebe E Freer, Robert Jared Weinfurtner, Elizabeth Kagan Arleo, Jennifer S Drukteinis
The goal of screening is to detect breast cancers when still curable to decrease breast cancer-specific mortality. Breast cancer screening in the United States is routinely performed with mammography, supplemental digital breast tomosynthesis, ultrasound, and/or MR imaging. This article aims to review the most commonly used breast imaging modalities for screening, discuss how often and when to begin screening with specific imaging modalities, and examine the pros and cons of screening. By the article's end, the reader will be better equipped to have informed discussions with patients and medical professionals regarding the benefits and disadvantages of breast cancer screening...
November 2017: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/28973699/screening-mammography-and-digital-breast-tomosynthesis-controversies
#5
REVIEW
Kimberly Funaro, Jennifer Drukteinis, Shannon Falcon
Breast cancer screening with mammography reduces breast cancer mortality; however, diverging recommendations regarding screening have caused controversy. The emerging technology of digital breast tomosynthesis (DBT) may soon become the mainstay of breast cancer screening. We present recommendations for breast cancer screening based on guidelines. A PubMed literature review was performed and the results from five large clinical studies comparing the efficacy of digital mammography alone versus digital mammography with DBT are examined...
October 2017: Southern Medical Journal
https://www.readbyqxmd.com/read/28961568/mri-in-the-assessment-of-bi-rads%C3%A2-4-lesions
#6
Doris Leithner, Georg Wengert, Thomas Helbich, Elizabeth Morris, Katja Pinker
The American College of Radiology (ACR) Breast Imaging-Reporting and Data System (BI-RADS) lexicon, which is used ubiquitously to standardize reporting of breast magnetic resonance imaging (MRI), provides 7 BI-RADS assessment categories to indicate the level of suspicion of malignancy and guide further management. A BI-RADS category 4 assessment is assigned when an imaging abnormality does not fulfill the typical criteria for malignancy, but is suspicious enough to warrant a recommendation for biopsy. The BI-RADS category 4 assessment covers a wide range of probability of malignancy, from >2 to <95%...
October 2017: Topics in Magnetic Resonance Imaging: TMRI
https://www.readbyqxmd.com/read/28956298/diagnostic-performance-of-digital-breast-tomosynthesis-and-full-field-digital-mammography-with-new-reconstruction-and-new-processing-for-dose-reduction
#7
Tokiko Endo, Takako Morita, Mikinao Oiwa, Namiko Suda, Yasuyuki Sato, Shu Ichihara, Misaki Shiraiwa, Kazuaki Yoshikawa, Takao Horiba, Hirotoshi Ogawa, Yukie Hayashi, Tomonari Sendai, Takahisa Arai
BACKGROUND: The main barrier to adoption of digital breast tomosynthesis (DBT) plus full-field digital mammography (FFDM) is radiation exposure dose. The purpose of this study was to evaluate the diagnostic performance of DBT plus FFDM, both with newly developed technology (nd), at a dose comparable to that of the conventional FFDM alone. METHODS: Nine hundred and thirteen participants were recruited from May 2014 to January 2016 consecutively. For each subject, the exposure setting for DBT(nd) + FFDM(nd) was also used for the conventional FFDM alone...
September 27, 2017: Breast Cancer: the Journal of the Japanese Breast Cancer Society
https://www.readbyqxmd.com/read/28948195/three-dimensional-segmentation-of-breast-masses-from-digital-breast-tomosynthesis-images
#8
Stefanie T L Pöhlmann, Yit Y Lim, Elaine Harkness, Susan Pritchard, Christopher J Taylor, Susan M Astley
Assessment of three-dimensional (3-D) morphology and volume of breast masses is important for cancer diagnosis, staging, and treatment but cannot be derived from conventional mammography. Digital breast tomosynthesis (DBT) provides data from which 3-D mass segmentation could be obtained. Our method combined Gaussian mixture models based on intensity and a texture measure indicative of in-focus structure, gray-level variance. Thresholding these voxel probabilities, weighted by distance to the estimated mass center, gave the final 3-D segmentation...
July 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28947267/variable-appearances-of-ductal-carcinoma-in-situ-calcifications-on-digital-mammography-synthesized-mammography-and-tomosynthesis-a-pictorial-essay
#9
REVIEW
Esther Hwang, Janet Szabo, Emily B Sonnenblick, Laurie R Margolies
This pictorial essay demonstrates the variable appearances of ductal carcinoma in situ on full-field digital mammography, synthesized mammography, and digital breast tomosynthesis. The spectrum of intercase and intracase variability suggests further refinement of reconstruction algorithms for synthesized mammography may be necessary to maximize early detection of ductal carcinoma in situ.
September 22, 2017: Canadian Association of Radiologists Journal, Journal L'Association Canadienne des Radiologistes
https://www.readbyqxmd.com/read/28946997/image-reconstruction-in-region-of-interest-or-interior-digital-tomosynthesis-dts-based-on-compressed-sensing-cs
#10
Soyoung Park, Guna Kim, Hyosung Cho, Uikyu Je, Chulkyu Park, Kyuseok Kim, Hyunwoo Lim, Dongyeon Lee, Hunwoo Lee, Seokyoon Kang, Jeongeun Park, Taeho Woo, Minsik Lee
BACKGROUND AND OBJECTIVE: Digital tomosynthesis (DTS) based on filtered-backprojection (FBP) reconstruction requires a full field-of-view (FOV) scan and relatively dense projections, which results in high doses for medical imaging purposes. To overcome these difficulties, we investigated region-of-interest (ROI) or interior DTS reconstruction where the x-ray beam span covers only a small ROI containing a target area. METHODS: An iterative method based on compressed-sensing (CS) scheme was compared with the FBP-based algorithm for ROI-DTS reconstruction...
November 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28943698/4d-dsa-reconstruction-using-tomosynthesis-projections
#11
Marc Buehler, Jordan M Slagowski, Charles A Mistretta, Charles M Strother, Michael A Speidel
We investigate the use of tomosynthesis in 4D DSA to improve the accuracy of reconstructed vessel time-attenuation curves (TACs). It is hypothesized that a narrow-angle tomosynthesis dataset for each time point can be exploited to reduce artifacts caused by vessel overlap in individual projections. 4D DSA reconstructs time-resolved 3D angiographic volumes from a typical 3D DSA scan consisting of mask and iodine-enhanced C-arm rotations. Tomosynthesis projections are obtained either from a conventional C-arm rotation, or from an inverse geometry scanning-beam digital x-ray (SBDX) system...
February 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/28943697/localization-of-cardiac-volume-and-patient-features-in-inverse-geometry-x-ray-fluoroscopy
#12
Michael A Speidel, Jordan M Slagowski, David A P Dunkerley, Martin Wagner, Tobias Funk, Amish N Raval
The scanning-beam digital x-ray (SBDX) system is an inverse geometry x-ray fluoroscopy technology that performs real-time tomosynthesis at planes perpendicular to the source-detector axis. The live display is a composite image which portrays sharp features (e.g. coronary arteries) extracted from a 16 cm thick reconstruction volume. We present a method for automatically determining the position of the cardiac volume prior to acquisition of a coronary angiogram. In the algorithm, a single non-contrast frame is reconstructed over a 44 cm thickness using shift-and-add digital tomosynthesis...
February 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/28943696/automated-3d-coronary-sinus-catheter-detection-using-a-scanning-beam-digital-x-ray-system
#13
David A P Dunkerley, Jordan M Slagowski, Lindsay E Bodart, Michael A Speidel
Scanning-beam digital x-ray (SBDX) is an inverse geometry x-ray fluoroscopy system capable of tomosynthesis-based 3D tracking of catheter electrodes concurrent with fluoroscopic display. To facilitate respiratory motion-compensated 3D catheter tracking, an automated coronary sinus (CS) catheter detection algorithm for SBDX was developed. The technique uses the 3D localization capability of SBDX and prior knowledge of the catheter shape. Candidate groups of points representing the CS catheter are obtained from a 3D shape-constrained search...
February 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/28943165/characterization-of-invisible-breast-cancers-in-digital-mammography-and-tomosynthesis-radio-pathological-correlation
#14
P M Aguilar Angulo, C Romero Castellano, J Ruiz Martín, M P Sánchez-Camacho González-Carrato, L M Cruz Hernández
OBJECTIVE: To review the radio-pathologic features of symptomatic breast cancers not detected at digital mammography (DM) and digital breast tomosynthesis (DBT). MATERIAL AND METHODS: Retrospective analysis of 169 lesions from symptomatic patients with breast cancer that were studied with DM, DBT, ultrasound (US) and magnetic resonance (MR). We identified occult lesions (true false negatives) in DM and DBT. Clinical data, density, US and MR findings were analyzed as well as histopathological results...
September 21, 2017: Radiología
https://www.readbyqxmd.com/read/28942947/identification-and-avoidance-of-vessels-during-imaging-guided-biopsies-an-additional-role-of-breast-tomosynthesis
#15
Benoît Mesurolle, Fabienne Brun, Mona El Khoury, Agnès Pétrou, Christine Bagard, Camille Monghal, Armelle Travade
No abstract text is available yet for this article.
September 21, 2017: Canadian Association of Radiologists Journal, Journal L'Association Canadienne des Radiologistes
https://www.readbyqxmd.com/read/28937263/imaging-features-of-breast-cancers-on-digital-breast-tomosynthesis-according-to-molecular-subtype-association-with-breast-cancer-detection
#16
Su Hyun Lee, Jung Min Chang, Sung Ui Shin, A Jung Chu, Ann Yi, Nariya Cho, Woo Kyung Moon
OBJECTIVE: To evaluate imaging features of breast cancers on digital breast tomosynthesis (DBT) according to molecular subtype and to determine whether the molecular subtype affects breast cancer detection on DBT. METHODS: This was an institutional review board--approved study with a waiver of informed consent. DBT findings of 288 invasive breast cancers were reviewed according to Breast Imaging Reporting and Data System lexicon. Detectability of breast cancer was quantified by the number of readers (0-3) who correctly detected the cancer in an independent blinded review...
October 9, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28932361/imaging-of-the-treated-breast-post-breast-conservation-surgery-oncoplasty-pictorial-review
#17
REVIEW
Subhash K Ramani, Ashita Rastogi, Abhishek Mahajan, Nita Nair, Tanuja Shet, Meenakshi H Thakur
Mammographic appearance of the normal breast is altered in the post-operative setting. It is essential to be aware of the normal findings as well as to identify features of recurrent disease with particular emphasis on radiological-pathological concordance. Digital breast tomosynthesis and volumetric breast density add incremental value in this clinical setting. We present a pictorial review of various cases to illustrate normal post-operative findings as well as mammographic features suspicious for recurrent disease...
August 28, 2017: World Journal of Radiology
https://www.readbyqxmd.com/read/28929809/can-breast-compression-be-reduced-in-digital-mammography-and-breast-tomosynthesis
#18
Greeshma A Agasthya, Ellen D'Orsi, Yoon-Jin Kim, Priyanka Handa, Christopher P Ho, Carl J D'Orsi, Ioannis Sechopoulos
OBJECTIVE: The objective of this study was to investigate the impact of decreasing breast compression during digital mammography and breast tomosynthesis (DBT) on perceived pain and image quality. MATERIALS AND METHODS: In this two-part study, two groups of women with prior mammograms were recruited. In part 1, subjects were positioned for craniocaudal (CC) and mediolateral oblique (MLO) views, and four levels of compression force were applied to evaluate changes in breast thickness, perceived pain, and relative tissue coverage...
September 20, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28929783/use-of-single-view-digital-breast-tomosynthesis-dbt-and-ultrasound-vs-additional-views-and-ultrasound-for-the-assessment-of-screen-detected-abnormalities-german-multi-reader-study
#19
Sylvia H Heywang-Köbrunner, Astrid Hacker, Alexander Jänsch, Ronald Kates, Sabina Wulz-Horber
Background Data on the value of digital breast tomosynthesis (DBT) for further assessment of screen-detected lesions are still limited. Purpose To compare screening mammography, single-view DBT and ultrasound-information (TS) vs. screening mammography, additional views and ultrasound-information (AV) for assessment of screen-detected abnormalities. Material and Methods The use of wide-angle DBT for screen-detected, soft-tissue abnormalities requiring additional views was investigated: 241 cases (206 benign and 35 malignant lesions), verified by histology or two-year follow-up, were read by ten readers as TS and as AV sets, yielding 2410 diagnoses for each set...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28914745/is-digital-tomosynthesis-on-par-with-computed-tomography-for-the-detection-and-measurement-of-pulmonary-nodules
#20
Xiang Wen Lee, Henry M Marshall, Steven C Leong, Rachael L O'Rourke, Karin Steinke, Negar Mirjalili, Rayleen V Bowman, Ian A Yang, Kwun M Fong
Chest digital tomosynthesis (DT) has potential advantages compared to computed tomography (CT) such as radiation dose reduction. However, the role of DT in pulmonary nodule management remains investigative. We compared DT against CT for pulmonary nodule detection and size measurement. A clinical population comprising 54 nodules from 30 patients and a screening population comprising 42 nodules from 52 patients were included. Scans were independently read by two radiologists. Agreement in nodule measurements between readers and between modalities was assessed by Bland-Altman analysis using a 95% level of significance...
September 13, 2017: Journal of Thoracic Imaging
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