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Breast ultrasound

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https://www.readbyqxmd.com/read/28109009/using-flow-characteristics-in-three-dimensional-power-doppler-ultrasound-imaging-to-predict-complete-responses-in-patients-undergoing-neoadjuvant-chemotherapy
#1
Wei-Chung Shia, Yu-Len Huang, Hwa-Koon Wu, Dar-Ren Chen
OBJECTIVES: Strategies are needed for the identification of a poor response to treatment and determination of appropriate chemotherapy strategies for patients in the early stages of neoadjuvant chemotherapy for breast cancer. We hypothesize that power Doppler ultrasound imaging can provide useful information on predicting response to neoadjuvant chemotherapy. METHODS: The solid directional flow of vessels in breast tumors was used as a marker of pathologic complete responses (pCR) in patients undergoing neoadjuvant chemotherapy...
January 21, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28108994/magnetic-resonance-imaging-directed-ultrasound-imaging-of-non-mass-enhancement-in-the-breast-outcomes-and-frequency-of-malignancy
#2
Adrienne R Newburg, Chloe M Chhor, Leng Leng Young Lin, Samantha L Heller, Jennifer Gillman, Hildegard K Toth, Linda Moy
OBJECTIVES: This study was performed to determine the frequency, predictors, and outcomes of ultrasound (US) correlates for non-mass enhancement. METHODS: From January 2005 to December 2011, a retrospective review of 5837 consecutive breast magnetic resonance imaging examinations at our institution identified 918 non-mass enhancing lesions for which follow-up or biopsy was recommended. Retrospective review of the images identified 879 of 918 lesions (96%) meeting criteria for non-mass enhancement...
January 21, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28106134/application-of-3d-and-2d-quantitative-shear-wave-elastography-swe-to-differentiate-between-benign-and-malignant-breast-masses
#3
Jie Tian, Qianqi Liu, Xi Wang, Ping Xing, Zhuowen Yang, Changjun Wu
As breast cancer tissues are stiffer than normal tissues, shear wave elastography (SWE) can locally quantify tissue stiffness and provide histological information. Moreover, tissue stiffness can be observed on three-dimensional (3D) colour-coded elasticity maps. Our objective was to evaluate the diagnostic performances of quantitative features in differentiating breast masses by two-dimensional (2D) and 3D SWE. Two hundred ten consecutive women with 210 breast masses were examined with B-mode ultrasound (US) and SWE...
January 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28106118/small-window-parametric-imaging-based-on-information-entropy-for-ultrasound-tissue-characterization
#4
Po-Hsiang Tsui, Chin-Kuo Chen, Wen-Hung Kuo, King-Jen Chang, Jui Fang, Hsiang-Yang Ma, Dean Chou
Constructing ultrasound statistical parametric images by using a sliding window is a widely adopted strategy for characterizing tissues. Deficiency in spatial resolution, the appearance of boundary artifacts, and the prerequisite data distribution limit the practicability of statistical parametric imaging. In this study, small-window entropy parametric imaging was proposed to overcome the above problems. Simulations and measurements of phantoms were executed to acquire backscattered radiofrequency (RF) signals, which were processed to explore the feasibility of small-window entropy imaging in detecting scatterer properties...
January 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28102955/compound-speckle-model-detects-anti-angiogenic-tumor-response-in-preclinical-nonlinear-contrast-enhanced-ultrasonography
#5
Matthew R Lowerison, Justin J Tse, M Nicole Hague, Ann F Chambers, David W Holdsworth, James C Lacefield
PURPOSE: This paper proposes a method for analyzing the first-order speckle statistics of nonlinear contrast-enhanced ultrasound images from tumors. METHODS: Contrast signal intensity is modeled as a compound distribution of exponential probability density functions with a gamma weighting function. The gamma probability weighting function serves as an approximation for log-normally distributed flow velocities in a vascular network. The model was applied to sub-harmonic bolus-injection images acquired from a mouse breast cancer xenograft model treated with murine version bevacizumab...
January 2017: Medical Physics
https://www.readbyqxmd.com/read/28102328/qualitative-and-quantitative-analysis-with-a-novel-shear-wave-speed-imaging-for-differential-diagnosis-of-breast-lesions
#6
Yu-Ping Yang, Xiao-Hong Xu, Le-Hang Guo, Ya-Ping He, Dan Wang, Bo-Ji Liu, Chong-Ke Zhao, Bao-Ding Chen, Hui-Xiong Xu
To evaluate the diagnostic performance of a new two-dimensional shear wave speed (SWS) imaging (i.e. Toshiba shear wave elastography, T-SWE) in differential diagnosis of breast lesions. 225 pathologically confirmed breast lesions in 218 patients were subject to conventional ultrasound and T-SWE examinations. The mean, standard deviation and ratio of SWS values (m/s) and elastic modulus (KPa) on T-SWE were computed. Besides, the 2D elastic images were classified into four color patterns. The area under the receiver operating characteristic (AUROC) curve analysis was performed to evaluate the diagnostic performance of T-SWE in differentiation of breast lesions...
January 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28098400/role-of-contrast-enhanced-sonography-in-the-evaluation-of-axillary-lymph-nodes-in-breast-carcinoma-a-monocentric-study
#7
Giacomo Agliata, Gianluca Valeri, Giulio Argalia, Elisa Tarabelli, Gian Marco Giuseppetti
OBJECTIVES: To evaluate the diagnostic performance of contrast-enhanced sonography for characterization of the lymph node status (metastatic or not) in patients with breast carcinomas by comparison with sentinel lymph node biopsy. METHODS: From January to August 2015, 50 female patients with a histologic diagnosis of invasive breast carcinoma were prospectively examined by ipsilateral axillary contrast-enhanced sonography. The test was performed by a single radiologist using an ultrasound system with a broadband 8-12-MHz, 38-mm high-resolution linear transducer...
January 18, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28097443/axillary-ultrasound-before-neoadjuvant-chemotherapy-for-breast-cancer-don-t-discount-the-benefits-yet
#8
EDITORIAL
Theresa L Schwartz, Julie A Margenthaler
No abstract text is available yet for this article.
January 17, 2017: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/28095866/improvement-of-displacement-estimation-of-breast-tissue-in-ultrasound-elastography-using-the-monogenic-signal
#9
Taher Slimi, Ines Marzouk Moussa, Tarek Kraiem, Halima Mahjoubi
BACKGROUND: In breast ultrasound elastography, tissues displacements estimation is obtained through a technique that follows the evolution of tissues under stress. However, during the acquisition of B-mode images, tissue displacements are often contaminated with multiplicative noise caused by changes in the speckle pattern in the tissue. Thus, the application of monogenic signal technique on the B-mode image in order to estimate displacement tissue, result in a presence of amplified noise in the deformation tissue image, which severely obscures the useful information...
January 17, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28094066/implementation-of-elastography-score-and-strain-ratio-in-combination-with-b-mode-ultrasound-avoids-unnecessary-biopsies-of-breast-lesions
#10
Kristina Bojanic, Natasa Katavic, Martina Smolic, Marija Peric, Kristina Kralik, Miroslav Sikora, Kristina Vidačić, Mirta Pacovski, Damir Stimac, Gordana Ivanac
The aim of this study was to evaluate whether the combination of B-mode ultrasound, elastography score (ES) and strain ratio (SR) improves diagnostic performance with respect to breast lesions. One hundred thirty lesions were prospectively evaluated by B-mode ultrasound and strain elastography, followed by fine-needle aspiration cytology/biopsy in 117 woman who were scheduled for regular breast BUS. The median ES (4.5 vs. 2.9, p < 0.001) and SR (4.9 vs. 2.3, p < 0.001) were significantly higher for malignant than for benign lesions...
January 13, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28091280/rotation-elastogram-estimation-using-synthetic-transmit-aperture-technique
#11
Lokesh B, Bhaskara Rao Chintada, Arun Kumar Thittai
It is well-documented in literature that benign breast lesions, such as fibroadenomas, are loosely bonded to their surrounding tissue and tend to slip under a small quasi-static compression, whereas malignant lesions being firmly bonded to their surrounding tissue do not slip. Recent developments in quasi-static ultrasound elastography have shown that an image of the axial-shear strain distribution can provide information about the bonding condition at the lesion-surrounding tissue boundary. Further studies analyzing the axial-shear strain elastograms revealed that nonzero axial-shear strain values appear inside the lesion, referred to as fill-in, only when a lesion is loosely bonded and asymmetrically oriented to the axis of compression...
January 1, 2017: Ultrasonic Imaging
https://www.readbyqxmd.com/read/28075622/imaging-surveillance-after-primary-breast-cancer-treatment
#12
Diana L Lam, Nehmat Houssami, Janie M Lee
OBJECTIVE: Current clinical guidelines are consistent in supporting annual mammography for women after treatment of primary breast cancer. Surveillance imaging beyond standard digital mammography, including digital breast tomosynthesis (DBT), breast ultrasound, and MRI, may improve outcomes. This article reviews the evidence on the performance and effectiveness of breast imaging modalities available for surveillance after treatment of sporadic unilateral primary breast cancer and identifies additional factors to be considered when selecting an imaging surveillance regimen...
January 11, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28075330/building-an-open-source-simulation-platform-of-acoustic-radiation-force-based-breast-elastography
#13
Yu Wang, Bo Peng, Jingfeng Jiang
Ultrasound-based elastography techniques including quasi-static strain elastography (SE), acoustic radiation force Impulse (ARFI) imaging, point shear wave elastography (pSWE) and supersonic shear imaging (SSI) have been used to differentiate breast tumors. The objective of this study is to extend a previously published virtual simulation platform of SE toward acoustic radiation force-based breast elastography. The proposed platform inherited four key components from the previously published virtual SE platform: an ultrasound simulator (Field II), a mesh generator (Tetgen), a finite element (FE) solver (FEBio) and a visualization and data processing package (VTK)...
January 11, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28072576/ultrasonic-computed-tomography-imaging-of-iron-oxide-nanoparticles
#14
Or Perlman, Haim Azhari
Iron oxide nanoparticles (IONPs) are becoming increasingly used and intensively investigated in the field of medical imaging. They are currently FDA approved for magnetic resonance imaging (MRI), and it would be highly desirable to visualize them by ultrasound as well. Previous reports using the conventional ultrasound B-scan (pulse-echo) imaging technique have shown very limited detectability of these particles. The aim of this study is to explore the feasibility of imaging IONPs using the through-transmission ultrasound methodology and demonstrate their detectability using ultrasonic computed tomography (UCT)...
February 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28070777/breast-ultrasound-image-segmentation-a-survey
#15
REVIEW
Qinghua Huang, Yaozhong Luo, Qiangzhi Zhang
PURPOSE: Breast cancer is the most common form of cancer among women worldwide. Ultrasound imaging is one of the most frequently used diagnostic tools to detect and classify abnormalities of the breast. Recently, computer-aided diagnosis (CAD) systems using ultrasound images have been developed to help radiologists to increase diagnosis accuracy. However, accurate ultrasound image segmentation remains a challenging problem due to various ultrasound artifacts. In this paper, we investigate approaches developed for breast ultrasound (BUS) image segmentation...
January 9, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28069201/pulsed-wave-low-dose-ultrasound-hyperthermia-selectively-enhances-nanodrug-delivery-and-improves-antitumor-efficacy-for-brain-metastasis-of-breast-cancer
#16
Sheng-Kai Wu, Chi-Feng Chiang, Yu-Hone Hsu, Houng-Chi Liou, Wen-Mei Fu, Win-Li Lin
The clinical application of chemotherapeutics for brain tumors remains a challenge due to limitation of blood-brain barrier/blood-tumor barrier (BBB/BTB). In this study, we investigated the effects of low-dose focused ultrasound hyperthermia (UH) on the delivery and therapeutic efficacy of pegylated liposomal doxorubicin (PLD) for brain metastasis of breast cancer. Murine breast cancer cells (4T1-luc2) expressing firefly luciferase were implanted into mouse striatum as a brain tumor model. The mice were intravenously injected with PLD with/without transcranial pulsed-wave/continuous-wave UH (pUH/cUH) treatment on day-6 after tumor implantation...
May 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28069161/the-value-of-routine-screening-mammography-in-women-aged-35-39-years-in-a-symptomatic-breast-unit
#17
A Buckley, N Healy, A Quinn, S A O'Keeffe
AIM: To determine the breast cancer detection rate at routine bilateral screening mammography in women aged 35-39 years attending a symptomatic breast clinic, in women of population-risk profile with a normal clinical examination. METHODS AND MATERIALS: A retrospective analysis of all mammograms performed on patients aged 35-39 years at St James's Hospital from 2011-2015 was carried out. Patients with moderate or high familial risk of breast cancer, personal breast cancer history or chest radiation, males, general practitioner (GP) and internal hospital referrals, and those with abnormal clinical examinations were excluded...
January 6, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28068382/the-impact-of-pre-operative-breast-mri-on-surgical-waiting-time
#18
Michelle Zhang, Simon Sun, Benoît Mesurolle
PURPOSE: To assess the impact of pre-operative breast MRI on surgical waiting time, and to identify factors contributing to the delay. MATERIALS AND METHODS: A retrospective cohort study involving 1274 patients was conducted after obtaining institutional ethics review. Surgical candidates for newly diagnosed breast cancer from 2007 to 2013 at a tertiary center were divided into 2 groups: those who had pre-operative MRI and those who did not. Linear regression using matched populations was used to compare the surgical waiting times, defined as time from the date of the first positive biopsy to the date of surgery...
2017: PloS One
https://www.readbyqxmd.com/read/28064296/the-follow-up-of-post-mastectomy-patients-should-the-ipsilateral-side-be-assessed-with-both-mammogram-and-ultrasound
#19
S Radhika, B Hartini, A Norlia, M P Suria-Hayati, M A Zulfiqar
AIM: This study aimed to determine findings of axillary view mammogram (MMG) and ultrasound (USG) of the ipsilateral side in post-mastectomy patients and to document difficulty level in performing the axillary view and patients' pain level during the procedure. METHODS: Post-mastectomy patients who had MMG and USG on follow-up during an 18-months period were included. The MMG and USG findings of 183 patients were reviewed and histology results were recorded when available...
October 2016: Medical Journal of Malaysia
https://www.readbyqxmd.com/read/28062964/mammotome-assisted-liposuction-a-novel-technique-for-accessory-breasts
#20
Xin Tang
INTRODUCTION: Due to its minimally invasive and highly precise nature, the mammotome, a vacuum-assisted breast biopsy device, has proven effective for the treatment of benign breast lesions. Taking advantage of both liposuction and the mammotome, we utilized the mammotome device for the excision of accessory breasts. METHODS: Between July 2010 and June 2014, 16 patients with accessory breasts received mammotome-assisted liposuction. After adipose was removed using this procedure, the mammotome system was used to excise the fibro-glandular tissue in accessory breasts under ultrasound monitoring...
January 7, 2017: Aesthetic Plastic Surgery
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