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Contrast ultrasound

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https://www.readbyqxmd.com/read/29220326/a-portable-ultrasound-system-for-non-invasive-ultrasonic-neuro-stimulation
#1
Weibao Qiu, Juan Zhou, Yan Chen, Min Su, Guofeng Li, Huixia Zhao, Xianyi Gu, De Meng, Congzhi Wang, Yang Xiao, Kwok Ho Lam, Jiyan Dai, Hairong Zheng
Fundamental insights into the function of the neural circuits often follows from the advances in methodologies and tools for neuroscience. Electrode- and optical- based stimulation methods have been used widely for neuro-modulation with high resolution. However, they are suffering from inherent invasive surgical procedure. Ultrasound has been proved as a promising technology for neuro-stimulation in a non-invasive manner. However, no portable ultrasound system has been developed particularly for neuro-stimulation...
December 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29220210/contrast-enhanced-ultrasound-of-the-liver-optimizing-technique-and-clinical-applications
#2
Emily H T Pang, Andy Chan, Stephen G Ho, Alison C Harris
OBJECTIVE: The purpose of this article is to review the general principles, technique, and clinical applications of contrast-enhanced ultrasound of the liver. CONCLUSION: Proper technique and optimization of contrast-enhanced ultrasound require a balance between maintaining the integrity of the microbubble contrast agent and preserving the ultrasound signal. Established and emerging applications in the liver include diagnosis of focal lesions, aiding ultrasound-guided intervention, monitoring of therapy, and aiding surgical management...
December 8, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/29218489/contrast-enhanced-ultrasound-of-the-kidney-a-single-institution-experience
#3
Sheng F Oon, Robert W Foley, Deirdre Quinn, David M Quinlan, Robert G Gibney
BACKGROUND: Focal renal masses are typically evaluated by means of triphasic contrast-enhanced CT or MRI scan but use of iodinated contrast or gadolinium is unsuitable for some patients. Contrast-enhanced ultrasound (CEUS) is an imaging alternative in this scenario but has limited availability in Ireland. AIM: The aim of the study was to retrospectively evaluate experience with selective use of CEUS for non-invasive characterization of focal renal masses in a tertiary referral institution in Ireland, with a particular focus on cystic renal lesions and the influence of CEUS on final Bosniak classification and treatment outcomes...
December 7, 2017: Irish Journal of Medical Science
https://www.readbyqxmd.com/read/29217901/xanthogranulomatous-cholecystitis-analysis-of-108-patients
#4
Osman Yucel, Mehmet Ali Uzun, Metin Tilki, Sevcan Alkan, Zeynep Gamze Kilicoglu, Ceren Canbey Goret
The aim of this study was to evaluate the clinical and radiological features of xanthogranulomatous cholecystitis (XGC) and the results of surgical treatment. This retrospective study concerns clinical, radiological, and surgical data as well as histopathological findings and postoperative results of 108 patients with XGC who were identified after evaluating 7916 cholecystectomy specimens between 2004 and 2014 in a single institute. One hundred eight patients with XGC were evaluated (56 males and 52 females, mean age 62...
December 2017: Indian Journal of Surgery
https://www.readbyqxmd.com/read/29216479/diagnosis-of-deep-vein-thrombosis-recurrence-ultrasound-criteria
#5
REVIEW
Mario Maufus, Antoine Elias, Marie-Thérèse Barrellier, Gilles Pernod
INTRODUCTION: Recurrent deep vein thrombosis (DVT) is often suspected in patients after anticoagulant drug withdrawal. The clinical signs can be confused with the onset of post-thrombotic syndrome. For these reasons, diagnosis of DVT recurrence must rely on an accurate method. MATERIALS AND METHODS: In order to assess this challenging clinical issue, we performed an overview of the literature regarding ultrasound criteria for the diagnosis of recurrent DVT through a Medline search, which included articles published from January 1, 1980 to February 20, 2017...
November 14, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/29212423/subtraction-computed-tomography-imaging-to-detect-endoleaks-after-endovascular-aneurysm-sealing-with-sac-anchoring
#6
Cornelis G Vos, Ruben van Veen, Richte Cl Schuurmann, Johannes T Boersen, Daniel Af van den Heuvel, Jean-Paul Pm de Vries
Background Early detection of small type I endoleaks after endovascular aneurysm sealing is mandatory because they can rapidly progress and lead to severe complications. Recognition of endoleaks can be challenging due to the appearances on computed tomography unique to endovascular aneurysm sealing. We aimed to validate the accuracy and added value of subtraction computed tomography imaging using a post-processing software algorithm to improve detection of endovascular aneurysm sealing-associated endoleaks on postoperative surveillance imaging...
January 1, 2017: Vascular
https://www.readbyqxmd.com/read/29212156/effects-of-cerebral-perfusion-pressure-on-regional-cerebral-blood-flow-in-dogs-with-acute-epidural-hematoma-quantitative-evaluation-with-contrast-enhanced-ultrasound
#7
Hongwei Cheng, Xiang Mao, Zonggang Hou, Jian Xu, Shuyu Hao, Huan Li, Baiyun Liu
To discuss the relationship between the regional cerebral blood flow (rCBF) and cerebral perfusion pressure (CPP) and the effect of CPP on rCBF in different spaces in an experimental animal model. As the ICP increased, the CPP and rCBF (A × β value measured by CEU) decreased to varying degrees. The rCBF1 and rCBF2 were well correlated with the CPP. At the same CPP, rCBF1 decreased significantly than the level of rCBF2 (p < 0.01). Six healthy cross-breed dogs, both males and females, weighing 18.3 ± 1...
November 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/29211893/aldosterone-is-not-associated-with-metabolic-and-microvascular-insulin-sensitivity-in-abdominally-obese-men
#8
Monica T J Schütten, Yvo H A M Kusters, Alfons J H M Houben, Jean L J M Scheijen, Marjo P H van de Waarenburg, Casper G Schalkwijk, Peter J Joris, Jogchum Plat, Ronald P Mensink, Peter W de Leeuw, Coen D A Stehouwer
Context: Impaired insulin-mediated muscle microvascular recruitment (IMMR) in obese individuals may add to the development of metabolic insulin resistance and hypertension. Increased aldosterone levels have been linked to these obesity-related complications in severely to morbidly obese individuals, and have been found to interfere with microvascular function in experimental studies. Objectives: To investigate whether aldosterone levels are related to IMMR, insulin sensitivity and blood pressure in lean and moderately abdominally obese men, and to study the effect of weight loss on these variables...
December 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29210419/polyethylene-nano-crystalsomes-formed-at-a-curved-liquid-liquid-interface
#9
Wenda Wang, Mark C Staub, Tian Zhou, Derrick M Smith, Hao Qi, Eric D Laird, Shan Cheng, Christopher Y Li
Crystallization is incommensurate with nanoscale curved space due to the lack of three dimensional translational symmetry of the latter. Herein, we report the formation of single-crystal-like, nanosized polyethylene (PE) capsules using a miniemulsion solution crystallization method. The miniemulsion was formed at elevated temperatures using PE organic solution as the oil phase and sodium dodecyl sulfate as the surfactant. Subsequently, cooling the system stepwisely for controlled crystallization led to the formation of hollow, nanosized PE crystalline capsules, which are named as crystalsomes since they mimic the classical self-assembled structures such as liposome, polymersome and colloidosome...
December 6, 2017: Nanoscale
https://www.readbyqxmd.com/read/29209117/application-of-superb-microvascular-imaging-in-focal-liver-lesions
#10
Meng-Na He, Ke Lv, Yu-Xin Jiang, Tian-An Jiang
AIM: To explore the ability of superb microvascular imaging (SMI) in differential diagnosis of focal liver lesions (FLLs) and to compare SMI morphology findings to those of color Doppler ultrasound and enhanced imaging. METHODS: Twenty-four patients with 31 FLLs were included in our study, with diagnoses of hemangioma (HE) (n = 17), hepatocellular carcinoma (HCC) (n = 5), metastatic lesions (n = 5), primary hepatic lymphoma (n = 1), focal nodular hyperplasia (FNH) (n = 2), and adenoma (n = 1)...
November 21, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29205610/three-dimensional-morphology-and-volume-of-the-free-achilles-tendon-at-rest-and-under-load-in-people-with-unilateral-mid-portion-achilles-tendinopathy
#11
Leila Nuri, Steven J Obst, Richard Newsham-West, Rod S Barrett
Mid-portion Achilles tendinopathy (MAT) adversely affects free Achilles tendon (AT) structure and composition. However, it is not known how these pathological alterations associated with MAT change the normal three-dimensional (3D) morphology of free AT at rest and under load throughout the entire free tendon length. Here, we used 3D ultrasound to examine the effect of unilateral MAT on free tendon 3D morphology [length, cross-sectional area (CSA), antero-posterior (AP) diameter, and medio-lateral (ML) diameter] and volume at rest and during a sub-maximal (50%) voluntary isometric plantarflexion contraction bilaterally in individuals with unilateral MAT (n = 10) compared to a matched healthy control group (n = 10)...
December 3, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/29205451/subdermal-ultrasound-contrast-agent-injection-for-sentinel-lymph-node-identification-an-analysis-of-safety-and-contrast-agent-dose-in-healthy-volunteers
#12
Priscilla Machado, Maria Stanczak, Ji-Bin Liu, Jason N Moore, John R Eisenbrey, Laurence Needleman, Walter K Kraft, Flemming Forsberg
OBJECTIVES: Mapping of the lymphatic chain for identification of the sentinel lymph node (SLN) is an important aspect of predicting outcomes for patients with breast cancer, and it is usually performed as an intraoperative procedure using blue dye and/or radiopharmaceutical agents. Recently, the use of contrast-enhanced ultrasound (CEUS) has been proposed as an alternative imaging technique for this mapping. The objective of this study was to evaluate the use of subdermal administration of the ultrasound (US) contrast agent Sonazoid (GE Healthcare, Oslo, Norway) in terms of patient safety and to select the dose to be used for lymphatic applications in humans...
December 5, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/29204237/pediatric-adrenal-trauma-evaluation-and-follow-up-with-contrast-enhanced-ultrasound-ceus
#13
Vasileios Rafailidis, Annamaria Deganello, Maria E Sellars, Erica Makin, Paul S Sidhu
Adrenal trauma is rarely encountered in the pediatric population, often as a component of multi-organ injury and often presenting with hematoma formation. Contrast-enhanced computed tomography (CECT) is the established imaging modality both for initial evaluation and follow-up of patients with blunt abdominal trauma. In children, radiation exposure should be minimized and alternative imaging strategies are needed. Contrast-enhanced ultrasound (CEUS) has recently been successfully used for evaluation of patients with hepatic, renal and splenic injury...
December 2017: Journal of Ultrasound
https://www.readbyqxmd.com/read/29204235/contrast-enhanced-ultrasonography-in-clinical-practice-in-crohn-s-disease-feasibility-of-destruction-replenishment-method-and-software-analysis
#14
Andrea Giannetti, Marco Matergi, Marco Biscontri, Luca Franci
The aim of this Pictorial Essay is to evaluate the feasibility in the clinical practice of CEUS destruction/replenishment method and time intensity curve (TIC) analysis using the available software in patients with Crohn's disease. The ultrasound (US) procedure using contrast agent is briefly described, elaboration and analysis of the US sequences are explained in detail, and some advantages and disadvantages of the method are highlighted. The Authors suggest that the destruction/replenishment method is useful and time-saving in Crohn's disease if multiple measurements are required on intestinal portions adjacent to each other or in different locations...
December 2017: Journal of Ultrasound
https://www.readbyqxmd.com/read/29203045/anaphylactic-shock-with-an-ultrasound-contrast-agent
#15
S Coudray, C Fabre, I Aichoun, A Perez-Martin
Echo contrast agents, such as SonoVue®, (Bracco, Milan, Italy) are often used to enhance diagnosis. Although their use is safe, some rare side effects could be severe or even fatal. We are reporting a case of severe systemic allergic reaction after infusion of SonoVue®. After a brief review of the literature, the aim of this paper is to draw attention to this risk and recall the safety instructions coming with the use of ultrasound contrast agents.
December 2017: Journal de Médecine Vasculaire
https://www.readbyqxmd.com/read/29202490/-metastasation-of-cutaneous-squamous-cell-carcinoma-in-the-ent-area
#16
Alexander Dellweg, Thomas Mantei
Objectives Our aim was to investigate the metastasis behavior and its prognostic Factor for Survival, with our clinical data. Materials and methods This retrospective study included 29 Caucasians, with a squamous cell carcinoma of the skin in the head and neck region, at our tertiary clinic between 2004 and 2016. All Patients received a Tumorresection and Neckdissection. We used either Ultrasound or Computer-Tomography (conventional or PET-CT) for our preoperative Staging and the Follow-up. The Patients were classified according to metastatic behavior and the corresponding survival rates were determined...
December 4, 2017: Laryngo- Rhino- Otologie
https://www.readbyqxmd.com/read/29201517/long-term-outcome-of-laparoscopic-vesicouterine-fistula-repair-experience-from-a-tertiary-referral-centre
#17
Bimalesh Purkait, Seema Mehrotra, Rahul Janak Sinha, Ved Bhaskar, Vishwajeet Singh
Objective: Vesicouterine fistula (VUF) is an uncommon cause of female genito-urinary fistula. Most of these fistulas are due to lower segment uterine cesarean section (LSCS). Traditionally, open surgical repair has been the traditional treatment. However, laparoscopic repair of VUF is a minimally invasive technique and few case reports have been published with short term follow up. In the present study, we are presenting our long- term outcome of laparoscopic repair of VUF. Material and methods: A retrospective analysis of 8 patients with VUF was performed from 2010 to 2015...
December 2017: Turkish Journal of Urology
https://www.readbyqxmd.com/read/29201278/axillary-nodal-staging-with-contrast-enhanced-ultrasound
#18
REVIEW
Nisha Sharma, Karina Cox
Purpose of Review: Axillary staging in the context of breast cancer is a contentious topic due to the varied practices across UK, Europe, and America. The ACOSOG Z0011 trial has questioned the role of axillary ultrasound in women with breast cancer. Published data has shown that women with ultrasound-positive lymph nodes have a worse prognosis than those with ultrasound-negative lymph nodes. Axillary ultrasound is limited as the sentinel lymph node (SLN) cannot be identified using B-mode ultrasound; however, with the advent of contrast-enhanced ultrasound (CEUS), this has now changed...
2017: Current Breast Cancer Reports
https://www.readbyqxmd.com/read/29201222/contrast-enhanced-ultrasound-is-better-than-magnetic-resonance-imaging-in-evaluating-the-short-term-results-of-microwave-ablation-treatment-of-uterine-fibroids
#19
Yan Zhang, Meiwu Zhang, Xiaoxiang Fan, Dafeng Mao
Contrast-enhanced ultrasound (CEUS) and magnetic resonance imaging (MRI) were compared in evaluating the short-term effects of microwave ablation (MWA) on uterine fibroids. A total of 60 patients with uterine fibroids treated by MWA were enrolled in the experimental group during their two-year follow-up period according to the inclusion criteria. Conventional two-dimensional US, MRI and CEUS were performed to determine the volume reduction and the fibroid residue by displaying the size, echo and signal intensity of fibroids prior to and after MWA treatment...
November 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29200669/adrenal-mass-unusual-presentation-and-outcome
#20
Raghu Sampally Ramareddy, Anand Alladi
Aim: Adrenal mass may be functioning or nonfunctioning with varied clinical presentations. This study aimed to report the nature and management of uncommon adrenal mass and to review literature. Materials and Methods: This was an retrospective observational analysis of children with uncommon adrenal mass admitted during 2009-2015. Clinical features, investigations, and management of patients were analyzed. Results: Among six, two each were adolescent and neonate, and one each was young infant and prenatal...
July 2017: Indian Journal of Medical and Paediatric Oncology
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