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https://www.readbyqxmd.com/read/28057965/ultrasound-findings-of-the-physiological-changes-and-most-common-breast-diseases-during-pregnancy-and-lactation
#1
REVIEW
Antônio Arildo Reginaldo de Holanda, Ana Katherine da Silveira Gonçalves, Robinson Dias de Medeiros, António Manuel Gouveia de Oliveira, Técia Maria de Oliveira Maranhão
Because of the physiological changes that occur during pregnancy and lactation, diagnostic ultrasound of the breast during these periods is a challenge for physicians. Therefore, a comprehensive understanding of imaging, anatomy, and physiology of the breast is important to effectively diagnosing diseases that can arise in women who are pregnancy or lactating. The aim of this article was to review the physiological changes that occur in the breasts during pregnancy and lactation, as well as to describe the main features of the breast diseases that occur most frequently during these periods...
November 2016: Radiologia Brasileira
https://www.readbyqxmd.com/read/28048813/mo-fg-209-04-dbt-applications-of-feature-adaptive-visual-search-model-oberver
#2
M Das
: This symposium will review recent advances in the simulation methods for evaluation of novel breast imaging systems - the subject of AAPM Task Group TG234. Our focus will be on the various approaches to development and validation of software anthropomorphic phantoms and their use in the statistical assessment of novel imaging systems using such phantoms along with computational models for the x-ray image formation process. Due to the dynamic development and complex design of modern medical imaging systems, the simulation of anatomical structures, image acquisition modalities, and the image perception and analysis offers substantial benefits of reduced cost, duration, and radiation exposure, as well as the known ground-truth and wide variability in simulated anatomies...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048735/mo-fg-209-00-recent-advances-in-virtual-tools-for-validation-of-3d-4d-breast-imaging-systems-tg234
#3
Predrag Bakic, Kyle Myers
: This symposium will review recent advances in the simulation methods for evaluation of novel breast imaging systems - the subject of AAPM Task Group TG234. Our focus will be on the various approaches to development and validation of software anthropomorphic phantoms and their use in the statistical assessment of novel imaging systems using such phantoms along with computational models for the x-ray image formation process. Due to the dynamic development and complex design of modern medical imaging systems, the simulation of anatomical structures, image acquisition modalities, and the image perception and analysis offers substantial benefits of reduced cost, duration, and radiation exposure, as well as the known ground-truth and wide variability in simulated anatomies...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048684/su-f-t-115-uncertainty-in-the-esophagus-dose-in-retrospective-epidemiological-study-of-breast-cancer-radiotherapy-patients
#4
E Mosher, S Kim, C Lee, C Pelletier, J Jung, E Jones, C Lee
PURPOSE: Epidemiological studies of second cancer risks in breast cancer radiotherapy patients often use generic patient anatomy to reconstruct normal tissue doses when CT images of patients are not available. To evaluate the uncertainty involved in the dosimetry approach, we evaluated the esophagus dose in five sample patients by simulating breast cancer treatments. METHODS: We obtained the diagnostic CT images of five anonymized adult female patients in different Body Mass Index (BMI) categories (16- 36kg/m2) from National Institutes of Health Clinical Center...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048553/su-c-brb-03-cross-institutional-validation-of-an-ultrafast-automatic-planning-platform-for-breast-irradiation
#5
T Li, Y Sheng, V Lockamy, P Anne, N Simone, Q J Wu, Y Yu
PURPOSE: Recently an ultrafast automatic planning system for breast irradiation using tangential beams was developed by modeling relationships between patient anatomy and achieved dose distribution. This study evaluates the performance of this system when applied to a different patient population and dose calculation algorithm. METHODS: The system and its anatomy-to-dose models was developed at institution A based on 20 cases, which were planned using manual fluence painting technique and calculated WITH heterogeneity correction...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048320/su-g-iep2-08-investigation-on-signal-detectability-in-volumetric-cone-beam-ct-images-with-anatomical-background
#6
M Han, J Baek
PURPOSE: To investigate the slice direction dependent detectability in cone beam CT images with anatomical background. METHODS: We generated 3D anatomical background images using breast anatomy model. To generate 3D breast anatomy, we filtered 3D Gaussian noise with a square root of 1/f(3) , and then assigned the attenuation coefficient of glandular (0.8cm(-1) ) and adipose (0.46 cm(-1) ) tissues based on voxel values. Projections were acquired by forward projection, and quantum noise was added to the projection data...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048161/mo-fg-209-05-towards-a-feature-based-anthropomorphic-model-observer
#7
A Avanaki
: This symposium will review recent advances in the simulation methods for evaluation of novel breast imaging systems - the subject of AAPM Task Group TG234. Our focus will be on the various approaches to development and validation of software anthropomorphic phantoms and their use in the statistical assessment of novel imaging systems using such phantoms along with computational models for the x-ray image formation process. Due to the dynamic development and complex design of modern medical imaging systems, the simulation of anatomical structures, image acquisition modalities, and the image perception and analysis offers substantial benefits of reduced cost, duration, and radiation exposure, as well as the known ground-truth and wide variability in simulated anatomies...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048077/mo-fg-209-01-introduction
#8
K Myers
: This symposium will review recent advances in the simulation methods for evaluation of novel breast imaging systems - the subject of AAPM Task Group TG234. Our focus will be on the various approaches to development and validation of software anthropomorphic phantoms and their use in the statistical assessment of novel imaging systems using such phantoms along with computational models for the x-ray image formation process. Due to the dynamic development and complex design of modern medical imaging systems, the simulation of anatomical structures, image acquisition modalities, and the image perception and analysis offers substantial benefits of reduced cost, duration, and radiation exposure, as well as the known ground-truth and wide variability in simulated anatomies...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048034/tu-ab-209-03-identifying-useful-features-for-visual-search-model-observers
#9
H Gifford
Digital breast tomosynthesis (DBT), a limited-angle tomographic technique by its nature has multiple optimal system configurations, which can lead to many potential changes to the existing and new DBT systems entering the US market. With the availability of computational tools such as for modeling imaging physics, it is becoming increasingly important to conduct virtual trials for a rigorous, preclinical and task-based assessment of DBT. For such virtual assessment to be successful, it is critical to: (1) develop model-observer approaches that can account for patient data statistics stemming from realistic or real breast backgrounds as well as lesion characteristics, thereby performing given tasks effectively and (2) validate the model-observer approaches and their performance trends/levels with physical measurements from a prototype or real DBT system and a physical phantom ensemble...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047981/tu-ab-209-00-model-observer-design-and-its-validation-for-task-based-evaluation-of-digital-breast-tomosynthesis
#10
Stephen Glick
Digital breast tomosynthesis (DBT), a limited-angle tomographic technique by its nature has multiple optimal system configurations, which can lead to many potential changes to the existing and new DBT systems entering the US market. With the availability of computational tools such as for modeling imaging physics, it is becoming increasingly important to conduct virtual trials for a rigorous, preclinical and task-based assessment of DBT. For such virtual assessment to be successful, it is critical to: (1) develop model-observer approaches that can account for patient data statistics stemming from realistic or real breast backgrounds as well as lesion characteristics, thereby performing given tasks effectively and (2) validate the model-observer approaches and their performance trends/levels with physical measurements from a prototype or real DBT system and a physical phantom ensemble...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047419/mo-fg-209-02-development-of-a-virtual-breast-phantom-from-a-multi-modality-perspective
#11
C Graff
: This symposium will review recent advances in the simulation methods for evaluation of novel breast imaging systems - the subject of AAPM Task Group TG234. Our focus will be on the various approaches to development and validation of software anthropomorphic phantoms and their use in the statistical assessment of novel imaging systems using such phantoms along with computational models for the x-ray image formation process. Due to the dynamic development and complex design of modern medical imaging systems, the simulation of anatomical structures, image acquisition modalities, and the image perception and analysis offers substantial benefits of reduced cost, duration, and radiation exposure, as well as the known ground-truth and wide variability in simulated anatomies...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047368/tu-ab-209-04-practical-examples-of-model-observer-applications-in-digital-breast-tomosynthesis
#12
H Bosmans
Digital breast tomosynthesis (DBT), a limited-angle tomographic technique by its nature has multiple optimal system configurations, which can lead to many potential changes to the existing and new DBT systems entering the US market. With the availability of computational tools such as for modeling imaging physics, it is becoming increasingly important to conduct virtual trials for a rigorous, preclinical and task-based assessment of DBT. For such virtual assessment to be successful, it is critical to: (1) develop model-observer approaches that can account for patient data statistics stemming from realistic or real breast backgrounds as well as lesion characteristics, thereby performing given tasks effectively and (2) validate the model-observer approaches and their performance trends/levels with physical measurements from a prototype or real DBT system and a physical phantom ensemble...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047311/tu-ab-209-01-virtual-and-physical-breast-phantoms-that-mimic-patients
#13
J Lo
Digital breast tomosynthesis (DBT), a limited-angle tomographic technique by its nature has multiple optimal system configurations, which can lead to many potential changes to the existing and new DBT systems entering the US market. With the availability of computational tools such as for modeling imaging physics, it is becoming increasingly important to conduct virtual trials for a rigorous, preclinical and task-based assessment of DBT. For such virtual assessment to be successful, it is critical to: (1) develop model-observer approaches that can account for patient data statistics stemming from realistic or real breast backgrounds as well as lesion characteristics, thereby performing given tasks effectively and (2) validate the model-observer approaches and their performance trends/levels with physical measurements from a prototype or real DBT system and a physical phantom ensemble...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046754/mo-fg-209-03-simulation-of-breast-anatomy-at-the-cellular-scale
#14
P Bakic
: This symposium will review recent advances in the simulation methods for evaluation of novel breast imaging systems - the subject of AAPM Task Group TG234. Our focus will be on the various approaches to development and validation of software anthropomorphic phantoms and their use in the statistical assessment of novel imaging systems using such phantoms along with computational models for the x-ray image formation process. Due to the dynamic development and complex design of modern medical imaging systems, the simulation of anatomical structures, image acquisition modalities, and the image perception and analysis offers substantial benefits of reduced cost, duration, and radiation exposure, as well as the known ground-truth and wide variability in simulated anatomies...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046640/tu-ab-209-02-designing-model-observers-for-signal-known-exactly-tasks-in-digital-breast-tomosynthesis
#15
S Park
Digital breast tomosynthesis (DBT), a limited-angle tomographic technique by its nature has multiple optimal system configurations, which can lead to many potential changes to the existing and new DBT systems entering the US market. With the availability of computational tools such as for modeling imaging physics, it is becoming increasingly important to conduct virtual trials for a rigorous, preclinical and task-based assessment of DBT. For such virtual assessment to be successful, it is critical to: (1) develop model-observer approaches that can account for patient data statistics stemming from realistic or real breast backgrounds as well as lesion characteristics, thereby performing given tasks effectively and (2) validate the model-observer approaches and their performance trends/levels with physical measurements from a prototype or real DBT system and a physical phantom ensemble...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046518/tu-h-campus-iep2-04-efficient-binary-tree-description-of-high-resolution-breast-models-for-in-silico-imaging
#16
A Badal, C Graff, R Zeng, F Samuelson, A Badano
PURPOSE: We introduce a new geometric model for Monte Carlo (MC) simulation of breast tomosynthesis and mammography images with very high resolution digital breast phantoms voxelized at resolutions down to 50 microns or less. This fine sampling of the anatomy is required to reproduce the spiculated lesions and microcalcifications visible in clinical mammograms with pixel sizes under 100 microns. Phantoms voxelized at this resolution require such a large amount of computer memory that it might not be possible to execute the simulation in regular computers or in Graphics Processing Units (GPU), limiting the realism that can be achieved in virtual clinical trials...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046484/we-ab-209-05-development-of-an-ultra-fast-high-quality-whole-breast-radiotherapy-treatment-planning-system
#17
Y Sheng, T Li, S Yoo, F Yin, R Blitzblau, J Horton, M Palta, C Hahn, Y Ge, Q Wu
PURPOSE: To enable near-real-time (<20sec) and interactive planning without compromising quality for whole breast RT treatment planning using tangential fields. METHODS: Whole breast RT plans from 20 patients treated with single energy (SE, 6MV, 10 patients) or mixed energy (ME, 6/15MV, 10 patients) were randomly selected for model training. Additional 20 cases were used as validation cohort. The planning process for a new case consists of three fully automated steps:1...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28042819/retroareolar-carcinomas-in-breast-ultrasound-pearls-and-pitfalls
#18
REVIEW
Romuald Ferré, Martine Paré, Lisa Smith, Mélanie Thériault, Ann Aldis, Ellen Kao, Benoit Mesurolle
Breast Ultrasound (US) is an important tool for both screening and diagnostic examinations. Although breast US has benefitted from significant recent technical improvements, its use for the retroareolar region is known to be more challenging than for other locations. The retroareolar location was defined by Giess et al. in 1998 as the region where any lesion is situated at less than two cm from the nipple and/or involves the nipple-areolar complex on mammogram. Understanding of the complex anatomy and physiology of the nipple-areolar region is important to avoid misinterpretation and misdiagnosis...
December 30, 2016: Cancers
https://www.readbyqxmd.com/read/27991695/application-of-extended-bi-pedicle-anterolateral-thigh-free-flaps-for-reconstruction-of-large-defects-a-case-series
#19
Michele Maruccia, Georgios Orfaniotis, Pedro Ciudad, Fabio Nicoli, Emanuele Cigna, Giuseppe Giudice, Kidakorn Kiranantawat, Diego Ribuffo, Hung-Chi Chen
BACKGROUND: The anterolateral thigh flap is a workforce flap in reconstructive surgery, however, variations in it is vascular anatomy are not uncommon. These variations may affect flap design and survival, especially when large flaps are required. In some anatomical variants the anterolateral thigh flap is supplied by two separate dominant pedicles, and in these cases a bi-pedicle modification may be necessary to ensure complete flap viability. The aim of this report is to evaluate the outcomes, and present our approach in using bi-pedicle anterolateral thigh flaps as a method to reduce the risk of partial flap necrosis when reconstructing sizeable soft tissue defects...
December 19, 2016: Microsurgery
https://www.readbyqxmd.com/read/27975023/complication-rates-with-human-acellular-dermal-matrices-retrospective-review-of-211-consecutive-breast-reconstructions
#20
Robert H Schnarrs, Claire M Carman, Chase Tobin, Serena A Chase, Kerri A Rossmeier
BACKGROUND: Human acellular dermal matrix (HADM) is commonly used to provide coverage and support for breast reconstruction. The primary purpose of this study was to evaluate the complication rates associated with breast reconstruction procedures when performed in conjunction with multiple types of HADM in a consecutive series. METHODS: After receiving institutional review board approval, medical records from a single surgeon were retrospectively reviewed for 126 consecutive patients (170 breasts and 211 procedures) who received a breast reconstruction or revision with implantation of HADM between 2012 and 2014...
November 2016: Plastic and Reconstructive Surgery. Global Open
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