journal
MENU ▼
Read by QxMD icon Read
search

Ultrasound in Medicine & Biology

journal
https://www.readbyqxmd.com/read/28634042/routine-ultrasound-quality-assurance-in-a-multi-unit-radiology-department-a-retrospective-evaluation-of-transducer-failures
#1
Anne-Mari Vitikainen, Juha I Peltonen, Eija Vartiainen
The importance of quality assurance (QA) in medical ultrasound (US) has been widely recognized and recommendations concerning technical QA have been published over the years. However, the demonstrated impact of a properly working QA protocol on clinical routine has been scarce. We investigated the transducer write-off causes for a 5-y period in a multi-unit radiology department with an annual average of 230 transducers in demanding diagnostic use. The transducer faults and the initial observers of the faults leading to transducer write-offs were traced and categorized...
June 17, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28634041/a-machine-learning-algorithm-toward-color-analysis-for-chronic-liver-disease-classification-employing-ultrasound-shear-wave-elastography
#2
Ilias Gatos, Stavros Tsantis, Stavros Spiliopoulos, Dimitris Karnabatidis, Ioannis Theotokas, Pavlos Zoumpoulis, Thanasis Loupas, John D Hazle, George C Kagadis
The purpose of the present study was to employ a computer-aided diagnosis system that classifies chronic liver disease (CLD) using ultrasound shear wave elastography (SWE) imaging, with a stiffness value-clustering and machine-learning algorithm. A clinical data set of 126 patients (56 healthy controls, 70 with CLD) was analyzed. First, an RGB-to-stiffness inverse mapping technique was employed. A five-cluster segmentation was then performed associating corresponding different-color regions with certain stiffness value ranges acquired from the SWE manufacturer-provided color bar...
June 17, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28629691/diastolic-carotid-artery-longitudinal-wall-motion-is-sensitive-to-both-aging-and-coronary-artery-disease-status-independent-of-arterial-stiffness
#3
Jason S Au, Sydney E Valentino, Patrick G McPhee, Maureen J MacDonald
We investigated the ability of systolic and diastolic carotid artery longitudinal wall motion (CALM) to delineate expected differences in arterial health in individuals representing a range of both age and health status. We recruited 161 younger healthy adults (aged 24 ± 5 y), 51 older healthy adults (aged 70 ± 5 y) and 14 adults with coronary artery disease (aged 67 ± 8 y) for resting assessment of CALM and arterial stiffness. All CALM parameters were reduced in the old healthy adults and adults with coronary artery disease compared with the young healthy adults (p < 0...
June 16, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28629690/axillary-lymph-node-sonographic-features-and-breast-tumor-characteristics-as-predictors-of-malignancy-a-nomogram-to-predict-risk
#4
Patricia Akissue de Camargo Teixeira, Luciano F Chala, Carlos Shimizu, José R Filassi, Jonathan Y Maesaka, Nestor de Barros
The purpose of this study was to build a mathematical model to predict the probability of axillary lymph node metastasis based on the ultrasonographic features of axillary lymph nodes and the tumor characteristics. We included 74 patients (75 axillae) with invasive breast cancer who underwent axillary ultrasonography ipsilateral to the tumor and fine-needle aspiration of one selected lymph node. Lymph node pathology results from sentinel lymph node biopsy or surgical dissection were correlated with lymph node ultrasonographic data and with the cytologic findings of fine-needle aspiration...
June 16, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28629689/advanced-power-doppler-technique-increases-synovial-vascularity-detection-in-patients-with-rheumatoid-arthritis
#5
Davide Orlandi, Salvatore Gitto, Silvia Perugin Bernardi, Angelo Corazza, Luca De Flaviis, Enzo Silvestri, Marco Amedeo Cimmino, Luca Maria Sconfienza
We compared the diagnostic performance of an advanced power Doppler technique (superb microvascular imaging [SMI]) with that of power Doppler Imaging (PDI) and B-mode ultrasound (US) in patients with early rheumatoid arthritis (RA) and RA under treatment with rituximab. Thirty patients (21 women aged 45 ± 11 y) affected by RA with remission to moderate disease activity were examined. Both hand joints were evaluated using US, PDI and SMI. Two radiologists reviewed all video clips and evaluated synovial vascularity intensity using a semi-quantitative scoring system...
June 16, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28625560/small-bowel-ultrasound-beyond-inflammatory-bowel-disease-an-updated-review-of-the-recent-literature
#6
REVIEW
Federica Cavalcoli, Alessandra Zilli, Mirella Fraquelli, Dario Conte, Sara Massironi
The use of bowel ultrasonography (US) for the evaluation of gut diseases has increased in recent years and has been proven to provide a widely available, non-invasive and inexpensive method for the initial work-up and follow-up of different intestinal diseases, limited mostly by technical challenges posed by the patient's anatomy. The present review aims to provide an extensive overview of the main pathologic features at US examination of intestinal diseases other than inflammatory bowel disease, both acute (e...
June 15, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28625559/feasibility-of-combined-doppler-ecg-assessment-of-internal-jugular-veins
#7
Inge Dierickx, Simon Van Hooland, Kathleen Tomsin, Daniel Vanhercke, Wilfried Cools, Hendrik Fransen, Wilfried Gyselaers
A standardized combined Doppler-electrocardiography technique was developed for measurement of the triphasic waveform characteristics in the internal jugular vein. Flow velocities at the A, X, V and Y peaks, the RR interval and the PA and RX times were measured. From these the venous impedance index ([X-A]/X) and the ratios PA/RR and RX/RR were calculated. Six measurements were performed at three different locations by two ultrasonographers in 21 randomly selected pregnant and non-pregnant women. Statistical models proved the feasibility and reproducibility of this technique, with the highest concordance correlation coefficients in the right distal internal vein...
June 15, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28625558/irregular-defects-in-hepatocellular-carcinomas-during-the-kupffer-phase-of-contrast-enhanced-ultrasonography-with-perfluorobutane-microbubbles-pathological-features-and-metastatic-recurrence-after-surgical-resection
#8
Junya Nuta, Naoki Shingaki, Yoshiyuki Ida, Ryo Shimizu, Shinya Hayami, Masaki Ueno, Kazuhiro Fukatsu, Masahiro Itonaga, Takeichi Yoshida, Yoshimasa Maeda, Kosaku Moribata, Hisanobu Deguchi, Takao Maekita, Mikitaka Iguchi, Jun Kato, Hiroki Yamaue, Hideyuki Tamai
The present study aimed to elucidate the association between post-vascular-phase (Kupffer-phase) images from contrast-enhanced ultrasonography (CEUS) with perfluorobutane microbubbles and metastatic recurrences after the resection of hepatocellular carcinoma (HCC). The study examined 73 patients with solitary HCC ≤5 cm in diameter who underwent CEUS before resection. HCC was defined as irregular type (including an irregular defect on Kupffer-phase images) or non-irregular type. Intrahepatic metastatic recurrence was defined as >3 intrahepatic recurrences...
June 15, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28624131/studying-arterial-stiffness-using-high-frequency-ultrasound-in-mice-with-alzheimer-disease
#9
Chin-Chia Huang, Hsiang-Fan Cheng, Ben-Peng Zhu, Pei-Yu Chen, Suet Theng Beh, Yu-Min Kuo, Chih-Chung Huang
Alzheimer disease (AD) is an irreversible, progressive brain disorder that causes slow loss of memory and thinking skills, normally leading to death in 3-9 y. The etiology of AD is not fully understood but is widely believed to be induced by the production and deposition of amyloid-β peptide in the brain. Recently, a correlation was discovered between amyloid-β deposition and atherosclerosis in the cerebral arteries of postmortem brains, indicating that amyloid-β promotes atherogenesis and that in turn atherosclerosis promotes brain amyloid-β accumulation...
June 14, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28619277/non-invasive-estimation-of-temperature-during-physiotherapeutic-ultrasound-application-using-the-average-gray-level-content-of-b-mode-images-a-metrological-approach
#10
André V Alvarenga, Volker Wilkens, Olga Georg, Rodrigo P B Costa-Félix
Healing therapies that make use of ultrasound are based on raising the temperature in biological tissue. However, it is not possible to heal impaired tissue by applying a high dose of ultrasound. The temperature of the tissue is ultimately the physical quantity that has to be assessed to minimize the risk of undesired injury. Invasive temperature measurement techniques are easy to use, despite the fact that they are detrimental to human well being. Another approach to assessing a rise in tissue temperature is to derive the material's general response to temperature variations from ultrasonic parameters...
June 12, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28606649/accuracy-of-lung-ultrasound-in-patients-with-acute-dyspnea-the-influence-of-age-multimorbidity-and-cognitive-and-motor-impairment
#11
Luca Vizioli, Paola Forti, Elena Bartoli, Marco Giovagnoli, Guerino Recinella, Davide Bernucci, Marco Masetti, Elena Martino, Gian Luca Pirazzoli, Marco Zoli, Giampaolo Bianchi
Discriminating between causes of dyspnea may be difficult, particularly in the elderly. The aim of this retrospective study of 83 inpatients with acute dyspnea was to assess the influence of age, multimorbidity and cognitive or motor impairment on the diagnostic accuracy of lung ultrasound (LUS) in discriminating acute heart failure (AHF) from noncardiogenic dyspnea (NCD). Univariate analysis indicates that LUS misdiagnosis was associated with the following parameters: history of stroke (p = 0.037), lower activity of daily living (p = 0...
June 9, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28606648/reliability-of-sonographic-assessment-of-biceps-femoris-distal-tendon-strain-during-passive-stretching
#12
Eleftherios Kellis, Athanasios Ellinoudis, Konstantina Intziegianni
The purpose of this study was to determine the intra-rater, inter-examiner and inter-observer reliability of biceps femoris long head (BFlh) tendon strain using ultrasound imaging. Nineteen patients (age: 20.4 ± 0.35 y) were tested twice with a 1-wk interval. Each session included passive stretching from three different hip positions. Tests were performed independently by two examiners while BFlh tendon displacement (mm) and strain (%) were manually extracted from ultrasound video footages by two observers...
June 9, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28602490/ultrasound-findings-on-hands-and-wrists-of-patients-with-systemic-lupus-erythematosus-relationship-with-physical-examination
#13
Carolina Freitas Lins, Daniel Lima de Sá Ribeiro, Willer Gonçalves Dourado Santos, Genevievi Rosa, Viviane Machicado, Ana Luisa Pedreira, Emanuela Pimenta da Fonseca, Anna Paula Mota Duque Sousa, Carla Baleeiro Rodrigues Silva, Marcos Antonio Almeida Matos, Mittermayer Barreto Santiago
Diagnosis of synovitis/tenosynovitis by physical examination can be difficult. Ultrasound (US) can be an effective tool for the evaluation of joint involvement in systemic lupus erythematosus (SLE). This study will describe musculoskeletal findings by US in SLE patients and the evaluation of their correlation with physical examination. SLE patients underwent clinical/sonographic evaluation of hand/wrists. In total, 896 joints were evaluated: at least 1 change on physical examination was found in 136 joints and at least 1 US abnormality was found in 65 of 896 joints...
June 8, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28595853/acoustically-active-catheter-for-intracardiac-navigation-by-color-doppler-ultrasonography
#14
Minako Katayama, David Zarbatany, Stephen S Cha, Mostafa Fatemi, Marek Belohlavek
Navigation of intracardiac catheters by echocardiography is challenging because of the fundamental limitations of B-mode ultrasonography. We describe a catheter fitted with a piezoelectric crystal, which vibrates and produces an instantaneous marker in color flow Doppler scans. The navigation learning curve was explored first in six pigs. Accuracy and precision of targeting with the navigation marker "off" (i.e., B-mode imaging) and "on" were assessed in another six pigs. Paired comparisons confirmed significantly (p = 0...
June 5, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28595852/three-dimensional-model-based-segmentation-in-echocardiography-using-high-temporal-tissue-and-blood-flow-information
#15
Inge H Gerrits, Maartje M Nillesen, Livia Kapusta, Johan M Thijssen, Chris L de Korte
Accurate 3-D surface segmentation is a challenging task in echocardiography because of the relatively low image quality. We introduce a new method for 3-D segmentation of the endocardium involving temporal decorrelation of echo signals originating from tissue and blood using radiofrequency (RF) signals acquired in 3-D Doppler mode. Temporal features were extracted in 3-D Doppler mode, where a sequence of RF lines is recorded for each image line. Each set of RF lines is highly correlated because of the high pulse repetition frequency...
June 5, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28595851/delineation-of-post-procedure-ablation-regions-with-electrode-displacement-elastography-with-a-comparison-to-acoustic-radiation-force-impulse-imaging
#16
Wenjun Yang, Tomy Varghese, Timothy Ziemlewicz, Marci Alexander, Meghan Lubner, James Louis Hinshaw, Shane Wells, Fred T Lee
We compared a quasi-static ultrasound elastography technique, referred to as electrode displacement elastography (EDE), with acoustic radiation force impulse imaging (ARFI) for monitoring microwave ablation (MWA) procedures on patients diagnosed with liver neoplasms. Forty-nine patients recruited to this study underwent EDE and ARFI with a Siemens Acuson S2000 system after an MWA procedure. On the basis of visualization results from two observers, the ablated region in ARFI images was recognizable on 20 patients on average in conjunction with B-mode imaging, whereas delineable ablation boundaries could be generated on 4 patients on average...
June 5, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28583325/neuroprotective-effect-of-low-intensity-pulsed-ultrasound-against-mpp-induced-neurotoxicity-in-pc12-cells-involvement-of-k2p-channels-and-stretch-activated-ion-channels
#17
Lu Zhao, Yi Feng, Aiwei Shi, Lei Zhang, Shifang Guo, Mingxi Wan
Parkinson's disease is the second most common neurodegenerative disease. It is characterized by the loss of dopaminergic neurons in the substantia nigra pars compacta. 1-Methyl-4-phenylpyridinium (MPP(+)) is a dopaminergic neuronal toxin that is widely used in constructing Parkinson's disease models in vitro. Low-intensity pulsed ultrasound (LIPUS) is a non-invasive therapeutic approach that has neuromodulation and neuroprotective effects in the central neural system; however, whether LIPUS can provide protection for dopaminergic neurons against MPP(+)-induced neurocytotoxicity remains unknown...
June 2, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28576620/sonographic-phenotypes-of-molecular-subtypes-of-invasive-ductal-cancer-in-automated-3-d-breast-ultrasound
#18
Jan C M van Zelst, Maschenka Balkenhol, Tao Tan, Matthieu Rutten, Mechli Imhof-Tas, Peter Bult, Nico Karssemeijer, Ritse M Mann
Our aim was to investigate whether Breast Imaging Reporting and Data System-Ultrasound (BI-RADS-US) lexicon descriptors can be used as imaging biomarkers to differentiate molecular subtypes (MS) of invasive ductal carcinoma (IDC) in automated breast ultrasound (ABUS). We included 125 IDCs diagnosed between 2010 and 2014 and imaged with ABUS at two institutes retrospectively. IDCs were classified as luminal A or B, HER2 enriched or triple negative based on reports of histopathologic analysis of surgical specimens...
May 30, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28554540/in%C3%A2-vivo-multiparametric-ultrasound-imaging-of-structural-and-functional-tumor-modifications-during-therapy
#19
Alexandre Dizeux, Thomas Payen, Delphine Le Guillou-Buffello, Eva Comperat, Jean-Luc Gennisson, Mickael Tanter, Michael Oelze, S Lori Bridal
Longitudinal imaging techniques are needed that can meaningfully probe the tumor microenvironment and its spatial heterogeneity. Contrast-enhanced ultrasound, shear wave elastography and quantitative ultrasound are ultrasound-based techniques that provide information on the vascular function and micro-/macroscopic tissue structure. Modifications of the tumor microenvironment induced by cytotoxic and anti-angiogenic molecules in ectopic murine Lewis lung carcinoma tumors were monitored. The most heterogenous structures were found in tumors treated with anti-angiogenic drug that simultaneously accumulated the highest levels of necrosis and fibrosis...
May 26, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28549736/ultrasound-strain-imaging-in-assessment-of-biceps-muscle-stiffness-and-dynamic-motion-in-healthy-adults
#20
Jing Gao, Pai-Chi Li, Johnson Chen, Wen He, Li-Juan Du, Robert Min, Michael O'Dell
We prospectively evaluated the feasibility of using ultrasound strain imaging (USI) to assess biceps brachii muscle (BBM) stiffness and dynamic motion in 10 healthy adults. The BBM axial deformation was produced by external compression with a sandbag (1.0 kg) tied onto the transducer. The BBM lateral movement was produced by manual passive elbow flexion and extension. By use of 2-D speckle tracking, captured 5-s real-time ultrasound data of BBM were processed to estimate axial strain, representing muscle stiffness, and lateral strain and tissue velocity, representing muscle dynamic motion...
May 23, 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"