journal
MENU ▼
Read by QxMD icon Read
search

Ultrasound in Medicine & Biology

journal
https://www.readbyqxmd.com/read/29336851/clinical-utility-of-fetal-short-lag-spatial-coherence-imaging
#1
Will Long, Dongwoon Hyun, Kingshuk Roy Choudhury, David Bradway, Patricia McNally, Brita Boyd, Sarah Ellestad, Gregg E Trahey
In this study, we evaluate the clinical utility of fetal short-lag spatial coherence (SLSC) imaging. Previous work has documented significant improvements in image quality with fetal SLSC imaging as quantified by measurements of contrast and contrast-to-noise ratio (CNR). The objective of this study was to examine whether this improved technical efficacy is indicative of the clinical utility of SLSC imaging. Eighteen healthy volunteers in their first and second trimesters of pregnancy were scanned using a modified Siemens SC2000 clinical scanner...
January 11, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29336850/microvenous-reflux-in-the-skin-of-limbs-with-superficial-venous-incompetence
#2
Darshna Govind, Kate N Thomas, Brigid G Hill, Andre M van Rij
This study investigated whether microvenous reflux can be detected in limbs with chronic venous disease using superb microvascular imaging (SMI) and colour Doppler imaging. Participants with venous disease (limbs, n = 26) and without venous disease (limbs, n = 10) were studied. The skin in the medial gaiter region was imaged using both SMI and colour Doppler to identify reflux in the small vessels in response to distal augmentation. The diameters and depths of responsive vessels were measured. In limbs with venous disease, reflux in response to provocation was visualised with SMI in a greater number of vessels (12/26 versus 4/26) and smaller vessels than with colour Doppler...
January 11, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29331358/assessing-risk-category-of-breast-cancer-by-ultrasound-imaging-characteristics
#3
Qiang Guo, Lei Zhang, Zhixin Di, Chunping Ning, Zhiwu Dong, Ziyao Li, Dongmo Wang, Chong Liu, Ming Zhao, Jiawei Tian
The purpose of our study was to assess the potential clinical value of ultrasound imaging in predicting risk category in patients with breast cancer. Three hundred thirty-six patients were enrolled and divided into a high-risk group (99, 29.5%) and mid- to low-risk group (237, 70.5%) according to the St. Gallen risk criteria. All data were retrospectively collected to analyze correlations between ultrasound features and risk category. The results revealed that the ultrasound features of irregular shape (p= 0...
January 10, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29331357/differentiation-of-inflammatory-from-fibrotic-ileal-strictures-among-patients-with-crohn-s-disease-based-on-visual-analysis-feasibility-study-combining-conventional-b-mode-ultrasound-contrast-enhanced-ultrasound-and-strain-elastography
#4
Emilio Quaia, Antonio Giulio Gennari, Maria Assunta Cova, Edwin J R van Beek
The aim of this pilot study was to assess prospectively the feasibility of conventional B-mode ultrasound (US) and contrast-enhanced ultrasound (CEUS) combined with real-time strain elastography (SE) in the differentiation of inflammatory from fibrotic ileal strictures among patients with Crohn's disease (CD) based on visual analysis. Twenty non-consecutive patients (15 male and 5 female; mean age ± standard deviation, 40.2 ± 10.22 y) with CD and stricture of the terminal ileal loop were scanned by conventional B-mode US and CEUS and, subsequently, by real-time SE...
January 10, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29331356/assessment-of-diastolic-function-using-ultrasound-elastography
#5
Maryam Vejdani-Jahromi, Jenna Freedman, Young-Joong Kim, Gregg E Trahey, Patrick D Wolf
Shear wave elasticity imaging (SWEI) is a novel ultrasound elastography technique for assessing tissue stiffness. In this study, we investigate the potential of SWEI for providing diastolic functional assessment. In 11 isolated rabbit hearts, pressure-volume (PV) measurements were recorded simultaneously with SWEI recordings from the left ventricle free wall before and after induction of global ischemia. PV-based end diastolic stiffness increased by 100% after ischemia (p <0.05), and SWEI stiffness showed an increase of 103% (p <0...
January 10, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29329688/motorizing-and-optimizing-ultrasound-strain-elastography-for-detection-of-intrauterine-growth-restriction-pregnancies
#6
Shier Nee Saw, Jess Yi Ru Low, Citra Nurfarah Zaini Mattar, Arijit Biswas, Lujie Chen, Choon Hwai Yap
Intrauterine growth restriction is a prevalent disease in pregnancy in which placental insufficiency leads to 5 to 10 times higher mortality and lifelong morbidities. The current detection rate is poor, and recently, ultrasound strain elastography (USEL) was proposed as a new diagnostic technique. Currently, placental USEL uses maternal subcutaneous fat as the reference layer, but this is not ideal as fat tissue stiffness can vary widely between subjects. Current USEL also uses manual palpation, and under different compression depths and rates, viscoelastic tissues such as placenta can yield different stiffness results...
January 9, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29329687/bubble-induced-color-doppler-feedback-correlates-with-histotripsy-induced-destruction-of-structural-components-in-liver-tissue
#7
Jonathan J Macoskey, Xi Zhang, Timothy L Hall, Jiaqi Shi, Shahaboddin Alahyari Beig, Eric Johnsen, Fred T Lee, Charles A Cain, Zhen Xu
Bubble-induced color Doppler (BCD) is a histotripsy-therapy monitoring technique that uses Doppler ultrasound to track the motion of residual cavitation nuclei that persist after the collapse of the histotripsy bubble cloud. In this study, BCD is used to monitor tissue fractionation during histotripsy tissue therapy, and the BCD signal is correlated with the destruction of structural and non-structural components identified histologically to further understand how BCD monitors the extent of treatment. A 500-kHz, 112-element phased histotripsy array is used to generate approximately 6- × 6- × 7-mm lesions within ex vivo bovine liver tissue by scanning more than 219 locations with 30-1000 pulses per location...
January 9, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29311005/preliminary-clinical-experience-with-a-combined-automated-breast-ultrasound-and-digital-breast-tomosynthesis-system
#8
Eric D Larson, Won-Mean Lee, Marilyn A Roubidoux, Mitchell M Goodsitt, Chris Lashbrook, Cynthia E Davis, Oliver D Kripfgans, Paul L Carson
We analyzed the performance of a mammographically configured, automated breast ultrasound (McABUS) scanner combined with a digital breast tomosynthesis (DBT) system. The GE Invenia ultrasound system was modified for integration with GE DBT systems. Ultrasound and DBT imaging were performed in the same mammographic compression. Our small preliminary study included 13 cases, six of whom had contained invasive cancers. From analysis of these cases, current limitations and corresponding potential improvements of the system were determined...
January 5, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29307443/low-intensity-ultrasound-reduces-high-glucose-induced-nitric-oxide-generation-in-retinal-pigment-epithelial-cells
#9
Mrigendra Bir Karmacharya, Binika Hada, So Ra Park, Byung Hyune Choi
Diabetic retinopathy (DR) is a severe micro-vascular complication of diabetes. High glucose (HG)-evoked nitric oxide (NO) production mediated by increased oxidative stress is a key factor in DR pathogenesis. In this study, we examined whether low-intensity ultrasound (LIUS) stimulation can reduce HG-induced NO generation. We determined that LIUS stimulation decreased the HG-induced NO generation possibly via inhibition of reactive oxygen species (ROS) and subsequently diminished the associated pro-inflammatory pathway involving the induced expression of inducible nitric oxide synthase, cyclooxygenase-2 and vascular endothelial growth factor...
January 4, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29306590/new-definition-criteria-of-myocardial-dysfunction-in-patients-with-liver-cirrhosis-a-speckle-tracking-and-tissue-doppler-imaging-study
#10
Roxana Cristina Rimbaş, Sorina Mihăilă Baldea, Ruxandra Drăgoi Galrinho Antunes Guerra, Simona Ionela Visoiu, Mihai Rimbaş, Corina Silvia Pop, Dragoş Vinereanu
There are no clear recommendations regarding cirrhotic cardiomyopathy (CC) evaluation in patients with pre-transplant liver cirrhosis. The roles of new methods, tissue Doppler imaging (TDI) and speckle tracking echocardiography (STE) in the diagnosis and prognosis of cirrhotic cardiomyopathy remain controversial. We investigated the utility of TDI/STE parameters in cirrhotic cardiomyopathy diagnosis and also in predicting mortality in patients with liver cirrhosis. Left/right ventricular function was studied using conventional TDI (velocities) and STE (strain/strain rate)...
January 3, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29305124/combination-of-sonoelastography-and-tirads-for-the-diagnostic-assessment-of-thyroid-nodules
#11
Simone Schenke, Michael Zimny
To evaluate the diagnostic performance of elastography alone and combined with Thyroid Imaging Reporting And Data System (TIRADS) for the assessment of non-autonomous thyroid nodules. We included 244 thyroid nodules and analyzed the visual elasticity scores, strain value (SV) and TIRADS classification. Histologic examination revealed 38 malignant (16%) and 206 benign nodules. The SV was lower in malignant nodules than in benign with an optimal cutoff ≤0.225. The visual elasticity scores showed a better diagnostic performance than the SV measurement...
January 2, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29305123/automated-visualization-and-quantification-of-spiral-artery-blood-flow-entering-the-first-trimester-placenta-using-3-d-power-doppler-ultrasound
#12
Gordon N Stevenson, J Alison Noble, Alec W Welsh, Lawrence Impey, Sally L Collins
The goal of our research was to quantify the placental vascularity in 3-D at 11-13 + 6 wk of pregnancy at precise distances from the utero-placental interface (UPI) using 3-D power Doppler ultrasound. With this automated image analysis technique, differences in vascularity between normal and pathologic pregnancies may be observed. The algorithm was validated using a computer-generated image phantom and applied retrospectively in 143 patients. The following features from the PD data were recorded: The number of spiral artery jets into the inter-villous space, total geometric and PD area...
January 2, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29289433/comparison-between-several-ultrasound-hand-joint-scores-and-conventional-radiography-in-diagnosing-hand-osteoarthritis
#13
Priyanka Sivakumaran, Sidra Hussain, Coziana Ciurtin
This is the first study to investigate the usefulness of a standardized ultrasound (US) examination protocol in diagnosing hand osteoarthritis (OA). We conducted a cross-sectional study including 62 patients, ultimately diagnosed with hand OA based on imaging evidence of osteoarthritic changes with the particular distribution required for fulfilment of American College of Radiology diagnosis criteria. We compared a 32-joint US score (wrists, metacarpophalangeal [MCP], proximal interphalangeal [PIP] or distal interphalangeal [DIP] and carpometacarpal [CMC]-1 joints), with smaller, predefined joint scores, assessing 22 joints (wrists, MCPs and PIPs or PIPs, DIPs and CMC-1), 10 joints (MCP 2-3, PIP 2-3 and CMC-1 or PIP 2-3, DIP 2-3 and CMC-1) and 6 joints (DIP 2-3, CMC-1), respectively...
December 27, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29288000/quantitative-analysis-of-helical-flow-with-accuracy-using-ultrasound-speckle-image-velocimetry-in-vitro-and-in-vivo-feasibility-studies
#14
Sang Joon Lee, Jun Hong Park, Jeong Ju Kim, Eunseop Yeom
Venous valve dysfunction and induced secondary abnormal flows are closely associated with venous diseases. Thus, detailed analysis of venous valvular flow is invaluable from biological and medical perspectives. However, most of the previous studies on venous perivalvular flows were based on qualitative analysis. On the contrary, quantitative analysis of perivalvular flows has not been fully understood. In this study, we used the ultrasound speckle image velocimetry (SIV) technique, which utilizes the speckle patterns of red blood cells (RBCs) created by ultrasound waves to measure 3-D valvular flows quantitatively...
December 26, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29287999/the-dependence-of-glomerular-capillary-hemorrhage-induced-by-contrast-enhanced-diagnostic-ultrasound-on-microbubble-diameter
#15
Douglas L Miller, Xiaofang Lu, Chunyan Dou, Mario L Fabiilli, Charles C Church
A recently proposed two-criterion model for cavitational bioeffects in tissue with microbubbles (MBs) was tested. The glomerular capillary hemorrhage bioeffect was observed in rat kidney for contrast agent MB suspensions with mean diameters of 1.6, 3.1 and 5.5 µm. A diagnostic ultrasound machine was used at 3.6 MHz and 5.5 MHz for intermittent scans at power settings 2 dB apart. Petechial hemorrhage counts scored on the surface of the kidneys, and glomeruli were scored in histology. Thresholds for the petechial hemorrhage measurements were the same for the large and medium MB suspensions but substantially higher for the small MBs...
December 26, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29284557/inter-scan-reproducibility-of-carotid-plaque-volume-measurements-by-3-d-ultrasound
#16
Benjamin V Sandholt, Antoine Collet-Billon, Robert Entrekin, Henrik H Sillesen
We tested a novel 3-D matrix transducer with respect to inter-scan reproducibility of carotid maximum plaque thickness (MPT) and volume measurements. To improve reproducibility while focusing on the largest plaque/most diseased part of the carotid artery, we introduced a new partial plaque volume (PPV) measure centered on MPT. Total plaque volume (TPV), PPV from a 10-mm segment and MPT were measured using dedicated semi-automated software on 38 plaques from 26 patients. Inter-scan reproducibility was assessed using the t-test, Bland-Altman plots and Pearson's correlation coefficient...
December 25, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29284556/ultrasound-characterization-of-bone-demineralization-using-a-support-vector-machine
#17
Max Denis, Leighton Wan, Mostafa Fatemi, Azra Alizad
We propose an ultrasound-guided remote measurement technique, utilizing an acoustic radiation force beam as our excitation source and a receiving hydrophone, to assess non-invasively a bone's mechanical properties. Features, such as velocity, were extracted from the acoustic pressure received from the bone surface. The typical velocity of an intact bone (3540 m/s) was higher in comparison to that of a demineralized bone (2231 m/s). According to the receiver operating characteristic curve, the optimal velocity cutoff value of ≥3096 m/s yields 80% sensitivity and 82...
December 25, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29284555/investigation-of-optimized-treatment-conditions-for-acoustic-transfection-technique-for-intracellular-delivery-of-macromolecules
#18
Min Gon Kim, Sangpil Yoon, Chi Tat Chiu, K Kirk Shung
Manipulation of cellular functions and structures by introduction of genetic materials inside cells has been one of the most prominent research areas in biomedicine. High-frequency ultrasound acoustic-transfection has recently been developed and confirmed by intracellular delivery of small molecules into HeLa cells at the single-cell level with high cell viability. After we proved the concept underlying the acoustic-transfection technique, treatment conditions for different human cancer cell lines have been intensively investigated to further develop acoustic-transfection as a versatile and adaptable transfection method by satisfying the requirements of high-delivery efficiency and cell membrane permeability with minimal membrane disruption...
December 25, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29277451/acoustic-properties-of-small-animal-soft-tissue-in-the-frequency-range-12-32%C3%A2-mhz
#19
Adela Rabell-Montiel, Adrian J Thomson, Tom A Anderson, Stephen D Pye, Carmel M Moran
Quality assurance phantoms are made of tissue-mimicking materials (TMMs) the acoustic properties of which mimic those of soft tissue. However, the acoustic properties of many soft tissue types have not been measured at ultrasonic frequencies >9 MHz. With the increasing use of high-frequency ultrasound for both clinical and pre-clinical applications, it is of increasing interest to ensure that TMMs accurately reflect the acoustic properties of soft tissue at these higher frequencies. In this study, the acoustic properties of ex vivo brain, liver and kidney samples from 50 mice were assessed in the frequency range 12-32 MHz...
December 22, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29276138/double-stage-delay-multiply-and-sum-beamforming-algorithm-applied-to-ultrasound-medical-imaging
#20
Moein Mozaffarzadeh, Masume Sadeghi, Ali Mahloojifar, Mahdi Orooji
In ultrasound (US) imaging, delay and sum (DAS) is the most common beamformer, but it leads to low-quality images. Delay multiply and sum (DMAS) was introduced to address this problem. However, the reconstructed images using DMAS still suffer from the level of side lobes and low noise suppression. Here, a novel beamforming algorithm is introduced based on expansion of the DMAS formula. We found that there is a DAS algebra inside the expansion, and we proposed use of the DMAS instead of the DAS algebra. The introduced method, namely double-stage DMAS (DS-DMAS), is evaluated numerically and experimentally...
December 22, 2017: Ultrasound in Medicine & Biology
journal
journal
24513
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"