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Contrast ultrasound

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https://www.readbyqxmd.com/read/29655812/routine-use-of-ultrasound-guidance-in-femoral-arterial-access-for-peripheral-vascular-intervention-decreases-groin-hematoma-rates-in-high-volume-surgeons
#1
Elica Inagaki, Alik Farber, Jeffrey J Siracuse, Matthew W Mell, Denis V Rybin, Gheorghe Doros, Jeffrey Kalish
OBJECTIVE: There is a documented learning curve when adopting ultrasound guidance (UG) to aid vascular access. In the Vascular Study Group of New England (VSGNE), routine UG during percutaneous femoral artery access was shown to protect against the complication of groin hematoma. We sought to confirm this finding in the Vascular Quality Initiative (VQI), a dataset with a larger sample size and broader geographic distribution, and evaluate the effects of ultrasound usage and interventionalist volume on hematoma rates following peripheral vascular interventions (PVI)...
April 12, 2018: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29652130/in-vivo-targeted-responsive-and-synergistic-cancer-nanotheranostics-by-mri-guided-synergistic-hifu-ablation-and-chemotherapy
#2
Hailin Tang, Yuan Guo, Li Peng, Hui Fang, Zhigang Wang, Yuanyi Zheng, Haitao Ran, Yu Chen
As one of the most representative non-invasive therapeutic modalities, high-intensity focused ultrasound (HIFU) has shown the great promise for cancer therapy, but its low therapeutic efficacy and biosafety significantly hinder the further extensive clinical translation and application. In this work, we report on the construction of a multifunctional theranostic nanoplatform to synergistically enhance the HIFU-therapeutic efficacy based on nanomedicine. A targeted and temperature-responsive theranostic nanoplatform (PFH/DOX@PLGA/Fe3O4-FA) has been designed and fabricated for efficient ultrasound/magnetic resonance dual-modality imaging-guided HIFU/chemo synergistic therapy...
April 13, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29650791/impairments-in-adipose-tissue-microcirculation-in-type-2-diabetes-mellitus-assessed-by-real-time-contrast-enhanced-ultrasound
#3
Donghua Hu, Devika Remash, Ryan D Russell, Timothy Greenaway, Stephen Rattigan, Kathryn A Squibb, Graeme Jones, Dino Premilovac, Stephen M Richards, Michelle A Keske
BACKGROUND: In obesity and type 2 diabetes mellitus (T2D), adipose tissue expansion (because of larger adipocytes) results in reduced microvascular density which is thought to lead to adipocyte hypoxia, inflammation, and reduced nutrient delivery to the adipocyte. Adipose tissue microvascular responses in humans with T2D have not been extensively characterized. Furthermore, it has not been determined whether impaired microvascular responses in human adipose tissue are most closely associated with adiposity, inflammation, or altered metabolism...
April 2018: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29650457/-non-palpable-testicular-tumors-in-adults-a-management-based-on-imaging-issue-from-the-french-urologic-association-genital-cancer-committee-s-edit
#4
L Rocher, L Feretti, P Camparo, P H Savoie, N Morel-Journel, T Murez, P Sebe, A Flechon, A Méjean, X Durand
BACKGROUND: Help in management of non-palpable testicular tumors. French Urologic Association Genital cancer committee's Edit. OBJECTIVES: To review their characterization at imaging findings of non-palpable testicular tumors. DOCUMENTARY SOURCES: Literature review (PubMed, Medline) of urological and radiological studies dealing with testicular tumors using keywords: non-palpable/incidental testicular tumors; color Doppler ultrasound; US elastography; magnetic resonance imaging; contrast enhanced sonography; partial surgery...
April 9, 2018: Progrès en Urologie
https://www.readbyqxmd.com/read/29650314/a-topo-graph-model-for-indistinct-target-boundary-definition-from-anatomical-images
#5
Hui Cui, Xiuying Wang, Jianlong Zhou, Guanzhong Gong, Stefan Eberl, Yong Yin, Lisheng Wang, Dagan Feng, Michael Fulham
BACKGROUND AND OBJECTIVE: It can be challenging to delineate the target object in anatomical imaging when the object boundaries are difficult to discern due to the low contrast or overlapping intensity distributions from adjacent tissues. METHODS: We propose a topo-graph model to address this issue. The first step is to extract a topographic representation that reflects multiple levels of topographic information in an input image. We then define two types of node connections - nesting branches (NBs) and geodesic edges (GEs)...
June 2018: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/29629428/spontaneous-and-traumatic-splenic-rupture-retrospective-clinical-b-mode-and-ceus-analysis-in-62-patients
#6
M Rosling, C Trenker, A Neesse, C Görg
Introduction: Both B-mode ultrasound and contrast-enhanced ultrasound (CEUS) are well established procedures when diagnosing traumatic splenic ruptures (TSR). To date, there are no data about CEUS patterns in spontaneous splenic ruptures (SSR). It remains unknown whether TSR and SSR differ with respect to clinical characteristics, B-mode and CEUS characteristics. Patients and Methods: Between 12/2003 and 2/2010, n=33 SSRs and n=29 TSRs were diagnosed in a tertiary referral center...
January 2018: Ultrasound International Open
https://www.readbyqxmd.com/read/29628300/long-term-outcomes-of-selective-renal-artery-embolization-for-renal-arteriovenous-fistulae-with-dilated-venous-sac
#7
Yasushi Kimura, Keigo Osuga, Yusuke Ono, Tetsuro Nakazawa, Hiroki Higashihara, Noriyuki Tomiyama
PURPOSE: To retrospectively evaluate the role of selective renal artery embolization for renal arteriovenous fistulae (AVFs) with dilated venous sac. MATERIALS AND METHODS: Between 2002 and 2015, 14 patients (7 men and 7 women; mean age, 60 years) with a single renal AVF with dilated venous sac underwent selective renal artery embolization. Three patients presented with gross hematuria, 4 presented with occult blood in urine, and 1 presented with chronic heart failure...
April 6, 2018: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/29628224/high-dynamic-range-ultrasound-application-for-imaging-tendon-pathology
#8
Yiming Xiao, Mathieu Boily, Hoda Sadat Hashemi, Hassan Rivaz
Raw ultrasound (US) signal has a very high dynamic range (HDR) and, as such, is compressed in B-mode US using a logarithmic function to fit within the dynamic range of digital displays. However, in some cases, hyper-echogenic tissue can be overexposed at high gain levels with the loss of hypo-echogenic detail at low gain levels. This can cause the loss of anatomic detail and tissue texture and frequent and inconvenient gain adjustments, potentially affecting the diagnosis. To mitigate these drawbacks, we employed tone mapping operators (TMOs) in HDR photography to create HDR US...
April 5, 2018: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/29627389/plasma-msept9-a-novel-circulating-cell-free-dna-based-epigenetic-biomarker-to-diagnose-hepatocellular-carcinoma
#9
Abderrahim Oussalah, Susann Rischer, Mouni Bensenane, Guillaume Conroy, Pierre Filhine-Tresarrieu, Renée Debard, Denise Forest-Tramoy, Thomas Josse, Dana Reinicke, Matthieu Garcia, Amandine Luc, Cédric Baumann, Ahmet Ayav, Valérie Laurent, Marcus Hollenbach, Cristina Ripoll, Rosa-Maria Guéant-Rodriguez, Fares Namour, Alexander Zipprich, Michael Fleischhacker, Jean-Pierre Bronowicki, Jean-Louis Guéant
BACKGROUND: Patients with cirrhosis are at high risk of hepatocellular carcinoma (HCC). The SEPT9 gene is a key regulator of cell division and tumor suppressor whose hypermethylation is associated with liver carcinogenesis. The primary aim of this study was to evaluate the diagnostic accuracy of a PCR-based assay for the analysis of SEPT9 promoter methylation in circulating cell-free DNA (mSEPT9) for diagnosing HCC among cirrhotic patients. METHODS: We report two phase II biomarker studies that included cirrhotic patients with or without HCC from France (initial study) and Germany (replication study)...
March 28, 2018: EBioMedicine
https://www.readbyqxmd.com/read/29625919/ultrasound-guided-lateral-and-subcostal-transversus-abdominis-plane-block-in-calves-a-cadaveric-study
#10
Alessandro Mirra, Alois von Rotz, Marta Schmidhalter, Lara Moser, Daniela Casoni, Claudia Spadavecchia
OBJECTIVE: To describe and assess the ultrasound-guided transversus abdominis plane (TAP) block feasibility in calf cadavers, to compare two injection volumes and to evaluate possible undesired solution spreads. STUDY DESIGN: Prospective, descriptive, anatomic study. ANIMALS: A group of 15 bovine cadavers weighing 47±11 kg (mean±standard deviation). METHODS: Lateral (n = 24) and subcostal (n = 12) TAP block approaches were assessed...
March 15, 2018: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/29625446/quantitative-evaluation-of-vascular-microcirculation-using-contrast-enhanced-ultrasound-imaging-in-rabbit-models-of-choroidal-melanoma
#11
Min Gao, Jinhua Tang, Kun Liu, Ming Yang, Haiyun Liu
Purpose: We investigated the application of contrast-enhanced ultrasound (CEUS) to quantify vascular perfusion in two animal models of choroidal melanoma. Methods: B16F10 and choroidal melanoma cell line (OCM1) melanoma xenografts were implanted into the cyclodialysis cleft of rabbits' right eyes. Fundus photography, indocyanine green angiography (ICGA), B-mode ultrasound, and CEUS were used to examine the tumors. Standard vascular parameters of CEUS imaging were evaluated, including the area under the receiver operating characteristic curve (AUC), peak intensity (IMAX), mean transit time (mTT), rise time, and time to peak...
March 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29625137/sensitivity-of-non-contrast-computed-tomography-for-small-renal-calculi-with-endoscopy-as-the-gold-standard
#12
Naeem Bhojani, Jessica E Paonessa, Marawan M El Tayeb, James C Williams, Tariq A Hameed, James E Lingeman
OBJECTIVES: To compare the sensitivity of non-contrast CT to endoscopy for detection of renal calculi. Imaging modalities for detection of nephrolithiasis have centered on abdominal x-ray (KUB), ultrasound (US), and non-contrast computed tomography (CT). Sensitivities of 58-62% (KUB), 45% (US), and 95-100% (CT) have been previously reported. However, these results have never been correlated with endoscopic findings. METHODS: Idiopathic calcium oxalate stone formers with symptomatic calculi requiring ureteroscopy (URS) were studied...
April 3, 2018: Urology
https://www.readbyqxmd.com/read/29622143/bioresorbable-scaffold-for-treatment-of-coronary-artery-lesions-intravascular-ultrasound-results-from-the-absorb-japan-trial
#13
Kozo Okada, Yasuhiro Honda, Hideki Kitahara, Kyuhachi Otagiri, Shigemitsu Tanaka, M Brooke Hollak, Paul G Yock, Jeffrey J Popma, Hajime Kusano, Wai-Fung Cheong, Krishnankutty Sudhir, Peter J Fitzgerald, Takeshi Kimura
OBJECTIVES: The aim of this study was to characterize post-procedural intravascular ultrasound (IVUS) findings in the ABSORB Japan trial, specifically stratified by the size of target coronary arteries. BACKGROUND: Despite overall noninferiority confirmed in recent randomized trials comparing bioresorbable vascular scaffolds (BVS) (Absorb BVS) and cobalt-chromium everolimus-eluting metallic stents (CoCr-EES), higher event rates of Absorb BVS have been reported with suboptimal deployment, especially in small coronary arteries...
April 9, 2018: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/29622119/routine-and-advanced-ultrasound-of-major-salivary-glands
#14
REVIEW
Kunwar Suryaveer Singh Bhatia, Yuk-Ling Dai
Ultrasound is the preferred initial imaging modality in Europe and Asia for assessing the major salivary glands. In experienced hands, it is sensitive for a range of salivary pathologies, often diagnostic, and also a safe, cost-effective gatekeeper for further investigations as well as image-guided diagnostic biopsies and aspirations. This article reviews the scanning technique and normal sonographic anatomy of major salivary glands and overviews typical sonographic appearances of salivary pathologies, including infective and inflammatory conditions, sialolithiasis, and neoplasms...
May 2018: Neuroimaging Clinics of North America
https://www.readbyqxmd.com/read/29620649/primary-medullary-hemorrhage-in-a-patient-with-coagulopathy-due-to-alcoholic-cirrhosis-a-case-report
#15
Guangxun Shen, Yu Gao, Kwee-Yum Lee, Guangxian Nan
RATIONALE: Mild-to-moderate alcoholic cirrhosis of the liver is related to spontaneous intracerebral hemorrhage (ICH). In terms of spontaneous brainstem hemorrhage, pontine is considered as the most common site in contrast to medulla oblongata where the hemorrhage is rarely seen. This rare primary medullary hemorrhage has been attributed so far to vascular malformation (VM), anticoagulants, hypertension, hemorrhagic transformation, and other undetermined factors. PATIENT CONCERNS: Herein, we describe a 53-year-old patient with 35-year history of alcohol abuse was admitted for acute-onset isolated hemianesthesia on the right side...
April 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29620140/diagnostic-and-prognostic-values-of-contrast%C3%A2-enhanced-ultrasound-combined-with-diffusion%C3%A2-weighted-magnetic-resonance-imaging-in-different-subtypes-of-breast-cancer
#16
Gui-Feng Liu, Zong-Qiang Wang, Shu-Hua Zhang, Xue-Feng Li, Lin Liu, Ying-Ying Miao, Shao-Nan Yu
The present study aimed to investigate the diagnostic and prognostic values of contrast‑enhanced ultrasound (CEUS) combined with diffusion‑weighted magnetic resonance imaging (DW‑MRI) in different subtypes of breast cancer (BC). CEUS and DW‑MRI were conducted in 232 patients with BC prior to surgical treatment. Patients were categorized as having the luminal A subtype, the luminal B subtype, triple‑negative subtype or the human epidermal growth factor receptor 2 (Her‑2)‑positive subtype according to their expression of the estrogen receptor (ER), progesterone receptor (PR) and Her‑2, as detected by immunohistochemistry...
March 27, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29615450/prospective-single-uk-centre-comparative-study-of-the-predictive-values-of-contrast-enhanced-ultrasound-compared-to-time-resolved-ct-angiography-in-the-detection-and-characterisation-of-endoleaks-in-high-risk-patients-undergoing-endovascular-aneurysm-repair
#17
Iain Nicholas Roy, Tze Yuan Chan, Gabriela Czanner, Steve Wallace, Srinivasa Rao Vallabhaneni
INTRODUCTION: Diagnosis of endoleaks is imperative to prevent failure of endovascular aneurysm repairs (EVARs). The gold standard for diagnosis of endoleaks is catheter-directed subtraction angiography, which is not a practicable choice for surveillance. CT angiography (CTA) is the historical surveillance modality of choice. Concerns over cost, potential nephrotoxicity of contrast agents and repeated radiation exposure led to colour duplex ultrasound scan (CDUS) becoming an established alternative...
April 3, 2018: BMJ Open
https://www.readbyqxmd.com/read/29614532/-current-trends-in-diagnosis-and-treatment-of-giant-cell-arteritis
#18
Michael Czihal, Christian Lottspeich, Ulrich Hoffmann
Giant cell arteritis (GCA) is the most common form of the primary large vessel vasculitides and typically occurs in individuals aged ≥ 50 years. This concise review article discusses current trends in the management of GCA, including important developments in sonographic assessment (B-mode sonography, contrast enhanced ultrasound) and medical treatment (biological treatment with the interleukin-6 receptor alpha inhibitor tocilizumab).
April 2018: Deutsche Medizinische Wochenschrift
https://www.readbyqxmd.com/read/29613991/imaging-findings-in-papillary-breast-lesions-an-analysis-of-ductal-findings-on-magnetic-resonance-imaging-and-ultrasound
#19
Ozgur Sarica, Murat Dokdok
PURPOSE: This study aims to analyze the imaging features of dilated ducts or ductal extension/relation of masses detected by ultrasound (US) and magnetic resonance imaging (MRI) and to correlate the results obtained through these 2 different imaging methods. Furthermore, the ability of the ductal relation pattern in differentiating benign and malignant lesions was explored. METHODS AND MATERIALS: Magnetic resonance imaging and US findings of 56 patients who had a pathologic diagnosis of papillary lesion were examined...
April 2, 2018: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/29611197/dceus-based-multi-parametric-perfusion-imaging-using-pulse-inversion-bubblet-decorrelation
#20
Diya Wang, Zhe Su, Yu Zhang, Xiaoyan Zhao, Supin Wang, Mingxi Wan
PURPOSE: This study aimed to clarify the influences of composite dynamic contrast-enhanced ultrasound (DCEUS) on multi-parametric perfusion imaging (PPI) and to develop a novel PPI scheme through pulse-inversion Bubblet decorrelation (PIBD) to improve its contrast and detailed discriminability. METHOD: In in vivo perfusion experiments on rabbit kidneys, a pair of phase-inverted 'Bubblets' was constructed. Phase-inverted raw radiofrequency echoes were reconstructed by using the maximum coefficients obtained from Bubblet decorrelation analysis and summed to form DCEUS loops...
April 2, 2018: Medical Physics
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