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3D Tomosynthesis

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https://www.readbyqxmd.com/read/29880984/galactography-with-tomosynthesis-technique-galactomosynthesis-renaissance-of-a-method
#1
Rüdiger Schulz-Wendtland, Caroline Preuss, Peter A Fasching, Christian R Loehberg, Michael P Lux, Julius Emons, Matthias W Beckmann, Michael Uder, Markus Mueller-Schimpfle
Introduction: For decades, conventional galactography was the only imaging technique capable of showing the mammary ducts. Today, diagnosis is based on a multimodal concept which combines high-resolution ultrasound with magnetic resonance (MR) mammography and ductoscopy/galactoscopy and has a sensitivity and specificity of up to 95%. This study used tomosynthesis in galactography for the first time and compared the synthetic digital 2D full-field mammograms generated with this technique with the images created using the established method of ductal sonography...
May 2018: Geburtshilfe und Frauenheilkunde
https://www.readbyqxmd.com/read/29847744/digital-breast-tomosynthesis-3d-mammography-for-breast-cancer-screening-and-for-assessment-of-screen-recalled-findings-review-of-the-evidence
#2
Tong Li, Michael Luke Marinovich, Nehmat Houssami
Digital breast tomosynthesis (DBT) addresses some of the limitations of digital mammography (DM) by reducing the effect of overlapping tissue. Emerging data have shown that DBT increases breast cancer (BC) detection and reduces recall in BC screening programs. Studies have also suggested that DBT improves assessment of screen-recalled findings. Areas covered: Studies of DBT for population BC screening and those for assessment of screen-detected findings were reviewed to provide an up-to-date summary of the evidence on DBT in the screening setting...
May 30, 2018: Expert Review of Anticancer Therapy
https://www.readbyqxmd.com/read/29740752/tomosynthesis-implementation-with-adaptive-online-calibration-on-clinical-c-arm-systems
#3
Khanlian Chung, Lothar R Schad, Frank G Zöllner
PURPOSE: Cone beam computed tomography (CBCT) systems offer physicians crucial 3D and 2D imaging capabilities during interventions. However, certain medical applications only require very specific information from the CBCTs (e.g., determination of the position of high-contrast objects). In diagnostics, tomosynthesis techniques can be used in these cases to minimize dose exposure. Therefore, integrating such techniques on CBCT systems could also be beneficial for interventions. In this paper, we investigate the performance of our implementation of circular tomosynthesis on a CBCT device...
May 8, 2018: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/29714710/markerless-positional-verification-using-template-matching-and-triangulation-of-kv-images-acquired-during-irradiation-for-lung-tumors-treated-in-breath-hold
#4
Colien Hazelaar, Max Dahele, Hassan Mostafavi, Lineke van der Weide, Ben J Slotman, Wilko F A R Verbakel
Lung tumors treated in breath-hold are subject to inter- and intra-breath-hold variations, which makes tumor position monitoring during each breath-hold important. A markerless technique is desirable, but limited tumor visibility on kV images makes this challenging. We evaluated if template matching+triangulation of kV projection images acquired during breath-hold stereotactic treatments could determine 3D tumor position. Band-pass filtering and/or digital tomosynthesis (DTS) were used as image pre-filtering/enhancement techniques...
May 1, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29504549/an-iterative-reconstruction-algorithm-for-digital-breast-tomosynthesis-imaging-using-real-data-at-three-radiation-doses
#5
Adem Polat, Isa Yildirim
BACKGROUND: Iterative image reconstruction in Digital Breast Tomosynthesis (DBT) is a developing modality that produces three-dimensional (3D) reconstructed images of a breast to detect suspicious lesions. Algebraic reconstruction technique (ART), one of the iterative image reconstruction methods, was applied to reconstruct 3D data of breast and is becoming as one alternative method for the conventional image reconstruction techniques such as filtered back projection (FBP) in DBT imaging...
February 27, 2018: Journal of X-ray Science and Technology
https://www.readbyqxmd.com/read/29376838/model-observer-for-assessing-digital-breast-tomosynthesis-for-multi-lesion-detection-in-the-presence-of-anatomical-noise
#6
Gezheng Wen, Mia K Markey, Tamara Miner Haygood, Subok Park
Model observers are widely used in task-based assessments of medical image quality. The presence of multiple abnormalities in a single set of images, such as in multifocal multicentric breast cancer (MFMC), has an immense clinical impact on treatment planning and survival outcomes. Detecting multiple breast tumors is challenging as MFMC is relatively uncommon, and human observers do not know the number or locations of tumors a priori. Digital breast tomosynthesis (DBT), in which an x-ray beam sweeps over a limited angular range across the breast, has the potential to improve the detection of multiple tumors...
February 16, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29370106/preliminary-results-of-a-new-auxiliary-mechatronic-near-field-radar-system-to-3d-mammography-for-early-detection-of-breast-cancer
#7
Ashkan Ghanbarzadeh Dagheyan, Ali Molaei, Richard Obermeier, Andrew Westwood, Aida Martinez, Jose Angel Martinez Lorenzo
Accurate and early detection of breast cancer is of high importance, as it is directly associated with the patients' overall well-being during treatment and their chances of survival. Uncertainties in current breast imaging methods can potentially cause two main problems: (1) missing newly formed or small tumors; and (2) false alarms, which could be a source of stress for patients. A recent study at the Massachusetts General Hospital (MGH) indicates that using Digital Breast Tomosynthesis (DBT) can reduce the number of false alarms, when compared to conventional mammography...
January 25, 2018: Sensors
https://www.readbyqxmd.com/read/29336877/sin-quadratic-model-for-chest-tomosynthesis-respiratory-signal-analysis-and-its-application-in-four-dimensional-chest-tomosynthesis-reconstruction
#8
Xi Tao, Hua Zhang, Genggeng Qin, Jianhua Ma, Qianjin Feng, Wufan Chen
Chest tomosynthesis (CTS) is a newly developed imaging technique which provides pseudo-3D volume anatomical information of thorax from limited-angle projections and contains much less of superimposed anatomy than the chest X-ray radiography. One of the relatively common problems in CTS is the patient respiratory motion during image acquisition, which negatively impacts the detectability. In this work, we propose a sin-quadratic model to analyze the respiratory motion during CTS scan, which is a real time method where the respiratory signal is generated by extracting the motion of diaphragm from projection radiographs...
February 2018: Medical Engineering & Physics
https://www.readbyqxmd.com/read/29328943/interval-breast-cancers-in-the-screening-with-tomosynthesis-or-standard-mammography-storm-population-based-trial
#9
Nehmat Houssami, Daniela Bernardi, Francesca Caumo, Silvia Brunelli, Carmine Fantò, Marvi Valentini, Giovanna Romanucci, Maria A Gentilini, Manuel Zorzi, Petra Macaskill
BACKGROUND & METHODS: The prospective 'screening with tomosynthesis or standard mammography' (STORM) trial recruited women participating in biennial breast screening in Italy (2011-2012), and compared sequential screen-readings based on 2D-mammography alone or based on tomosynthesis (integrated 2D/3D-mammography). The STORM trial showed that tomosynthesis screen-reading significantly increased breast cancer detection compared to 2D-mammography alone. The present study completes reporting of the trial by examining interval breast cancers ascertained at two year follow-up...
April 2018: Breast: Official Journal of the European Society of Mastology
https://www.readbyqxmd.com/read/29302784/initial-results-of-the-fusion-x-us-prototype-combining-3d-automated-breast-ultrasound-and-digital-breast-tomosynthesis
#10
Benedikt Schaefgen, Joerg Heil, Richard G Barr, Marcus Radicke, Aba Harcos, Christina Gomez, Anne Stieber, André Hennigs, Alexandra von Au, Julia Spratte, Geraldine Rauch, Joachim Rom, Florian Schütz, Christof Sohn, Michael Golatta
PURPOSE: To determine the feasibility of a prototype device combining 3D-automated breast ultrasound (ABVS) and digital breast tomosynthesis in a single device to detect and characterize breast lesions. METHODS: In this prospective feasibility study, the FUSION-X-US prototype was used to perform digital breast tomosynthesis and ABVS in 23 patients with an indication for tomosynthesis based on current guidelines after clinical examination and standard imaging. The ABVS and tomosynthesis images of the prototype were interpreted separately by two blinded experts...
January 4, 2018: European Radiology
https://www.readbyqxmd.com/read/29176921/foveated-model-observers-to-predict-human-performance-in-3d-images
#11
Miguel A Lago, Craig K Abbey, Miguel P Eckstein
We evaluate 3D search requires model observers that take into account the peripheral human visual processing (foveated models) to predict human observer performance. We show that two different 3D tasks, free search and location-known detection, influence the relative human visual detectability of two signals of different sizes in synthetic backgrounds mimicking the noise found in 3D digital breast tomosynthesis. One of the signals resembled a microcalcification (a small and bright sphere), while the other one was designed to look like a mass (a larger Gaussian blob)...
February 11, 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/29066138/evidence-on-synthesized-two-dimensional-mammography-versus-digital-mammography-when-using-tomosynthesis-three-dimensional-mammography-for-population-breast-cancer-screening
#12
REVIEW
Nehmat Houssami
One limitation of using digital breast tomosynthesis (3-dimensional [3D] mammography) technology with conventional (2-dimensional [2D]) mammography for breast cancer (BC) screening is the increased radiation dose from dual acquisitions. To resolve this problem, synthesized 2D (s2D) reconstruction images similar to 2D mammography were developed using tomosynthesis acquisitions. The present review summarizes the evidence for s2D versus digital mammography (2D) when using tomosynthesis (3D) for BC screening to address whether using s2D instead of 2D (alongside 3D) will yield similar detection measures...
September 28, 2017: Clinical Breast Cancer
https://www.readbyqxmd.com/read/29047034/quantitative-volumetric-k-means-cluster-segmentation-of-fibroglandular-tissue-and-skin-in-breast-mri
#13
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/28943698/4d-dsa-reconstruction-using-tomosynthesis-projections
#14
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/28943696/automated-3d-coronary-sinus-catheter-detection-using-a-scanning-beam-digital-x-ray-system
#15
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/28901614/investigating-simulation-based-metrics-for-characterizing-linear-iterative-reconstruction-in-digital-breast-tomosynthesis
#16
Sean D Rose, Adrian A Sanchez, Emil Y Sidky, Xiaochuan Pan
PURPOSE: Simulation-based image quality metrics are adapted and investigated for characterizing the parameter dependences of linear iterative image reconstruction for DBT. METHODS: Three metrics based on a 2D DBT simulation are investigated: (1) a root-mean-square-error (RMSE) between the test phantom and reconstructed image, (2) a gradient RMSE where the comparison is made after taking a spatial gradient of both image and phantom, and (3) a region-of-interest (ROI) Hotelling observer (HO) for signal-known-exactly/background-known-exactly (SKE/BKE) and signal-known-exactly/background-known-statistically (SKE/BKS) detection tasks...
September 2017: Medical Physics
https://www.readbyqxmd.com/read/28713173/a-standard-mammography-unit-standard-3d-ultrasound-probe-fusion-prototype-first-results
#17
Rüdiger Schulz-Wendtland, Sebastian M Jud, Peter A Fasching, Arndt Hartmann, Marcus Radicke, Claudia Rauh, Michael Uder, Marius Wunderle, Paul Gass, Hanna Langemann, Matthias W Beckmann, Julius Emons
AIM: The combination of different imaging modalities through the use of fusion devices promises significant diagnostic improvement for breast pathology. The aim of this study was to evaluate image quality and clinical feasibility of a prototype fusion device (fusion prototype) constructed from a standard tomosynthesis mammography unit and a standard 3D ultrasound probe using a new method of breast compression. MATERIALS AND METHODS: Imaging was performed on 5 mastectomy specimens from patients with confirmed DCIS or invasive carcinoma (BI-RADS (™) 6)...
June 2017: Geburtshilfe und Frauenheilkunde
https://www.readbyqxmd.com/read/28665291/the-compressed-breast-during-mammography-and-breast-tomosynthesis-in-vivo-shape-characterization-and-modeling
#18
Alejandro Rodríguez-Ruiz, Greeshma A Agasthya, Ioannis Sechopoulos
To characterize and develop a patient-based 3D model of the compressed breast undergoing mammography and breast tomosynthesis. During this IRB-approved, HIPAA-compliant study, 50 women were recruited to undergo 3D breast surface imaging with structured light (SL) during breast compression, along with simultaneous acquisition of a tomosynthesis image. A pair of SL systems were used to acquire 3D surface images by projecting 24 different patterns onto the compressed breast and capturing their reflection off the breast surface in approximately 12-16 s...
August 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28483356/evaluation-of-a-breast-software-model-for-2d-and-3d-x-ray-imaging-studies-of-the-breast
#19
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...
September 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28436856/task-based-modeling-of-a-5k-ultra-high-resolution-medical-imaging-system-for-digital-breast-tomosynthesis
#20
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. A 3-D cascaded system analysis for a 50- [Formula: see text] 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)...
September 2017: IEEE Transactions on Medical Imaging
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