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3D Tomosynthesis

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https://www.readbyqxmd.com/read/28072573/design-and-application-of-a-structured-phantom-for-detection-performance-comparison-between-breast-tomosynthesis-and-digital-mammography
#1
L Cockmartin, N W Marshall, G Zhang, K Lemmens, E Shaheen, C Van Ongeval, E Fredenberg, D R Dance, E Salvagnini, K Michielsen, H Bosmans
This paper introduces and applies a structured phantom with inserted target objects for the comparison of detection performance of digital breast tomosynthesis (DBT) against 2D full field digital mammography (FFDM). The phantom consists of a 48 mm thick breast-shaped polymethyl methacrylate (PMMA) container filled with water and PMMA spheres of different diameters. Three-dimensionally (3D) printed spiculated masses (diameter range: 3.8-9.7 mm) and non-spiculated masses (1.6-6.2 mm) along with microcalcifications (90-250 µm) were inserted as targets...
January 10, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28072394/three-dimensional-cascaded-system-analysis-of-a-50-%C3%A2%C2%B5m-pixel-pitch-wafer-scale-cmos-active-pixel-sensor-x-ray-detector-for-digital-breast-tomosynthesis
#2
Chumin Zhao, Nikita Vassiljev, Anastasios Konstantinidis, Robert Speller, Jerzy Kanicki
High-resolution, low-noise x-ray detectors based on the complementary metal-oxide-semiconductor (CMOS) active pixel sensor (APS) technology have been developed and proposed for digital breast tomosynthesis (DBT). In this study, we evaluated the three-dimensional (3D) imaging performance of a 50 ��m pixel pitch CMOS APS x-ray detector named DynAMITe (Dynamic Range Adjustable for Medical Imaging Technology). The two-dimensional (2D) angle-dependent modulation transfer function (MTF), normalized noise power spectrum (NNPS), and detective quantum efficiency (DQE) were experimentally characterized and modeled using the cascaded system analysis at oblique incident angles up to 30��...
January 10, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28048364/we-fg-207a-01-introduction-to-dedicated-breast-ct-early-studies
#3
S Vedantham
: Mammography-based screening has been a valuable imaging tool for the early detection of non-palpable lesions and has contributed to significant reduction in breast cancer associated mortality. However, the breast imaging community recognizes that mammography is not ideal, and in particular is inferior for women with dense breasts. Also, the 2-D projection of a 3-D organ results in tissue superposition contributing to false-positives. The sensitivity of mammography is breast-density dependent...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048270/su-g-jep3-06-lower-kv-image-dose-are-expected-from-a-limited-angle-intra-fractional-verification-live-system-for-sbrt-treatments
#4
G Ding, F Yin, L Ren
PURPOSE: In order to track the tumor movement for patient positioning verification during arc treatment delivery or in between 3D/IMRT beams for stereotactic body radiation therapy (SBRT), the limited-angle kV projections acquisition simultaneously during arc treatment delivery or in-between static treatment beams as the gantry moves to the next beam angle was proposed. The purpose of this study is to estimate additional imaging dose resulting from multiple tomosynthesis acquisitions in-between static treatment beams and to compare with that of a conventional kV-CBCT acquisition...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047813/su-d-209-07-measure-the-average-glandular-dose-of-a-2d-3d-breast-imaging-protocol-using-ge-senoclaire-breast-tomosynthesis-system
#5
Y Liang, A Dutta
PURPOSE: To measure the average glandular dose (AGD) of a 2D+3D breast imaging protocol using GE SenoClaire breast tomosynthesis system. METHODS: This study used a GE SenoClaire breast tomosynthesis unit, a Gammex ACR mammography accreditation phantom, 5 cm thick PMMA phantom, an Unfors RaySafe X2 mammography detector. The breast imaging protocol includes a regular 2D CC view and a 3D MLO view at 45 degree, using AUTO mode. Both ACR phantom and PMMA phantom were scanned under AUTO mode with 10 daN compression to obtain the techniques of 2D CC view, 3D MLO view, and 3D CC view...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047717/we-fg-207a-02-why-we-need-breast-ct-clinical-perspective
#6
A O'Connell
: Mammography-based screening has been a valuable imaging tool for the early detection of non-palpable lesions and has contributed to significant reduction in breast cancer associated mortality. However, the breast imaging community recognizes that mammography is not ideal, and in particular is inferior for women with dense breasts. Also, the 2-D projection of a 3-D organ results in tissue superposition contributing to false-positives. The sensitivity of mammography is breast-density dependent...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047520/we-fg-207a-05-dedicated-breast-ct-as-a-diagnostic-imaging-tool-physics-and-clinical-feasibility
#7
A Karellas
: Mammography-based screening has been a valuable imaging tool for the early detection of non-palpable lesions and has contributed to significant reduction in breast cancer associated mortality. However, the breast imaging community recognizes that mammography is not ideal, and in particular is inferior for women with dense breasts. Also, the 2-D projection of a 3-D organ results in tissue superposition contributing to false-positives. The sensitivity of mammography is breast-density dependent...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047068/we-fg-207a-03-low-dose-cone-beam-breast-ct-physics-and-technology-development
#8
J Boone
: Mammography-based screening has been a valuable imaging tool for the early detection of non-palpable lesions and has contributed to significant reduction in breast cancer associated mortality. However, the breast imaging community recognizes that mammography is not ideal, and in particular is inferior for women with dense breasts. Also, the 2-D projection of a 3-D organ results in tissue superposition contributing to false-positives. The sensitivity of mammography is breast-density dependent...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047066/we-ab-bra-11-improved-imaging-of-permanent-prostate-brachytherapy-seed-implants-by-combining-an-endorectal-x-ray-sensor-with-a-ct-scanner
#9
J Steiner, K Matthews, G Jia
PURPOSE: To test feasibility of the use of a digital endorectal x-ray sensor for improved image resolution of permanent brachytherapy seed implants compared to conventional CT. METHODS: Two phantoms simulating the male pelvic region were used to test the capabilities of a digital endorectal x-ray sensor for imaging permanent brachytherapy seed implants. Phantom 1 was constructed from acrylic plastic with cavities milled in the locations of the prostate and the rectum...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046408/we-fg-207a-04-performance-characteristics-of-photon-counting-breast-ct
#10
W Kalender
: Mammography-based screening has been a valuable imaging tool for the early detection of non-palpable lesions and has contributed to significant reduction in breast cancer associated mortality. However, the breast imaging community recognizes that mammography is not ideal, and in particular is inferior for women with dense breasts. Also, the 2-D projection of a 3-D organ results in tissue superposition contributing to false-positives. The sensitivity of mammography is breast-density dependent...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046291/we-fg-207a-00-advances-in-dedicated-breast-ct
#11
Srinivasan Vedantham, Sabee Molloi
: Mammography-based screening has been a valuable imaging tool for the early detection of non-palpable lesions and has contributed to significant reduction in breast cancer associated mortality. However, the breast imaging community recognizes that mammography is not ideal, and in particular is inferior for women with dense breasts. Also, the 2-D projection of a 3-D organ results in tissue superposition contributing to false-positives. The sensitivity of mammography is breast-density dependent...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28044312/optimization-of-contrast-enhanced-breast-imaging-analysis-using-a-cascaded-linear-system-model
#12
Yue-Houng Hu, David A Scaduto, Wei Zhao
PURPOSE: Contrast-enhanced (CE) breast imaging involves the injection contrast agents (i.e., iodine) to increase conspicuity of malignant lesions. CE imaging may be used in conjunction with digital mammography (DM) or digital breast tomosynthesis (DBT) and has shown promise in improving diagnostic specificity. Both CE-DM and CE-DBT techniques require optimization as clinical diagnostic tools. Physical factors including x-ray spectra, subtraction technique, and the signal from iodine contrast, must be considered to provide the greatest object detectability and image quality...
November 21, 2016: Medical Physics
https://www.readbyqxmd.com/read/27992059/a-novel-physical-anthropomorphic-breast-phantom-for-2d-and-3d-x-ray-imaging
#13
Lynda C Ikejimba, Christian G Graff, Shani Rosenthal, Andreu Badal, Bahaa Ghammraoui, Joseph Y Lo, Stephen J Glick
PURPOSE: Physical phantoms are central to the evaluation of 2D and 3D breast imaging systems. Currently available physical phantoms have limitations including unrealistic uniform background structure, large expense, or excessive fabrication time. The purpose of this work is to outline a method for rapidly creating realistic, inexpensive physical anthropomorphic phantoms for use in full field digital mammography (FFDM) and digital breast tomosynthesis (DBT). METHODS: The phantom was first modeled using analytical expressions and then discretized into voxels of a specified size...
December 19, 2016: Medical Physics
https://www.readbyqxmd.com/read/27977412/design-and-application-of-a-structured-phantom-for-detection-performance-comparison-between-breast-tomosynthesis-and-digital-mammography
#14
Lesley Cockmartin, Nicholas Marshall, Guozhi Zhang, Kim Lemmens, Eman Shaheen, Chantal Van Ongeval, Erik Fredenberg, David Dance, Elena Salvagnini, Koen Michielsen, Hilde Bosmans
This paper introduces and applies a structured phantom with target objects for the comparison of detection performance of digital breast tomosynthesis (DBT) against full field digital mammography (FFDM). The phantom consists of a 48 mm thick breast-shaped polymethyl methacrylate (PMMA) container filled with water and PMMA spheres of different diameters. Three-dimensionally (3D) printed spiculated masses (diameter range: 3.8-9.7 mm) and non-spiculated masses (1.6-6.2 mm) along with microcalcifications (90-250 µm) were inserted as targets...
December 15, 2016: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27966220/semi-automated-delineation-of-breast-cancer-tumors-and-subsequent-materialization-using-three-dimensional-printing-rapid-prototyping
#15
Rüdiger Schulz-Wendtland, Markus Harz, Martina Meier-Meitinger, Barbara Brehm, Till Wacker, Horst K Hahn, Florian Wagner, Thomas Wittenberg, Matthias W Beckmann, Michael Uder, Peter A Fasching, Julius Emons
OBJECTIVE: Three-dimensional (3D) printing has become widely available, and a few cases of its use in clinical practice have been described. The aim of this study was to explore facilities for the semi-automated delineation of breast cancer tumors and to assess the feasibility of 3D printing of breast cancer tumors. METHODS: In a case series of five patients, different 3D imaging methods-magnetic resonance imaging (MRI), digital breast tomosynthesis (DBT), and 3D ultrasound-were used to capture 3D data for breast cancer tumors...
December 14, 2016: Journal of Surgical Oncology
https://www.readbyqxmd.com/read/27908154/mass-detection-in-digital-breast-tomosynthesis-deep-convolutional-neural-network-with-transfer-learning-from-mammography
#16
Ravi K Samala, Heang-Ping Chan, Lubomir Hadjiiski, Mark A Helvie, Jun Wei, Kenny Cha
PURPOSE: Develop a computer-aided detection (CAD) system for masses in digital breast tomosynthesis (DBT) volume using a deep convolutional neural network (DCNN) with transfer learning from mammograms. METHODS: A data set containing 2282 digitized film and digital mammograms and 324 DBT volumes were collected with IRB approval. The mass of interest on the images was marked by an experienced breast radiologist as reference standard. The data set was partitioned into a training set (2282 mammograms with 2461 masses and 230 DBT views with 228 masses) and an independent test set (94 DBT views with 89 masses)...
December 2016: Medical Physics
https://www.readbyqxmd.com/read/27721194/rapid-review-estimates-of-incremental-breast-cancer-detection-from-tomosynthesis-3d-mammography-screening-in-women-with-dense-breasts
#17
REVIEW
Nehmat Houssami, Robin M Turner
High breast tissue density increases breast cancer (BC) risk, and the risk of an interval BC in mammography screening. Density-tailored screening has mostly used adjunct imaging to screen women with dense breasts, however, the emergence of tomosynthesis (3D-mammography) provides an opportunity to steer density-tailored screening in new directions potentially obviating the need for adjunct imaging. A rapid review (a streamlined evidence synthesis) was performed to summarise data on tomosynthesis screening in women with heterogeneously dense or extremely dense breasts, with the aim of estimating incremental (additional) BC detection attributed to tomosynthesis in comparison with standard 2D-mammography...
December 2016: Breast: Official Journal of the European Society of Mastology
https://www.readbyqxmd.com/read/27533028/increased-cancer-detection-rate-and-variations-in-the-recall-rate-resulting-from-implementation-of-3d-digital-breast-tomosynthesis-into-a-population-based-screening-program
#18
Richard E Sharpe, Shambavi Venkataraman, Jordana Phillips, Vandana Dialani, Valerie J Fein-Zachary, Seema Prakash, Priscilla J Slanetz, Tejas S Mehta
No abstract text is available yet for this article.
September 2016: Radiology
https://www.readbyqxmd.com/read/27384301/molecular-breast-tomosynthesis-with-scanning-focus-multi-pinhole-cameras
#19
Jarno van Roosmalen, Marlies C Goorden, Freek J Beekman
Planar molecular breast imaging (MBI) is rapidly gaining in popularity in diagnostic oncology. To add 3D capabilities, we introduce a novel molecular breast tomosynthesis (MBT) scanner concept based on multi-pinhole collimation. In our design, the patient lies prone with the pendant breast lightly compressed between transparent plates. Integrated webcams view the breast through these plates and allow the operator to designate the scan volume (e.g. a whole breast or a suspected region). The breast is then scanned by translating focusing multi-pinhole plates and NaI(Tl) gamma detectors together in a sequence that optimizes count yield from the volume-of-interest...
August 7, 2016: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27375314/method-for-dose-reduced-3d-catheter-tracking-on-a-scanning-beam-digital-x-ray-system-using-dynamic-electronic-collimation
#20
David A P Dunkerley, Tobias Funk, Michael A Speidel
Scanning-beam digital x-ray (SBDX) is an inverse geometry x-ray fluoroscopy system capable of tomosynthesis-based 3D catheter tracking. This work proposes a method of dose-reduced 3D tracking using dynamic electronic collimation (DEC) of the SBDX scanning x-ray tube. Positions in the 2D focal spot array are selectively activated to create a region-of-interest (ROI) x-ray field around the tracked catheter. The ROI position is updated for each frame based on a motion vector calculated from the two most recent 3D tracking results...
February 27, 2016: Proceedings of SPIE
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