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Contrast enhanced ultrasound

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https://www.readbyqxmd.com/read/28922441/evaluation-of-2d-shear-wave-elastography-for-characterisation-of-focal-liver-lesions
#1
Ludmila Gerber, Daniel Fitting, Kajana Srikantharajah, Nina Weiler, Georgia Kyriakidou, Joerg Bojunga, Falko Schulze, Dimitra Bon, Stefan Zeuzem, Mireen Friedrich-Rust
BACKGROUND AND AIM: This is a prospective study for evaluation of 2D-shear wave elastography (2D-SWE) for characterisation and differentiation of benign und malignant focal liver lesions (FLLs). METHODS: The patients referred to our ultrasound unit were prospectively included. B-mode ultrasound and 2D-SWE (Aixplorer® France) were performed for one FLL in each patient. Liver histology and/or contrast-enhanced imaging were used as a reference method. RESULTS: 140 patients with FLL were included...
September 2017: Journal of Gastrointestinal and Liver Diseases: JGLD
https://www.readbyqxmd.com/read/28921952/nano-air-seeds-trapped-in-mesoporous-janus-nanoparticles-facilitate-cavitation-and-enhance-ultrasound-imaging
#2
Konstantin Tamarov, Andrey Sviridov, Wujun Xu, Markus Malo, Valery Andreev, Victor Yu Timoshenko, Vesa-Pekka Lehto
The current contrast agents utilized in ultrasound (US) imaging are based on microbubbles which, however, suffer from a short lifetime in the systemic circulation. The present study introduces a new type of contrast agents for US imaging based on bioresorbable Janus nanoparticles (NPs) that are able to generate microbubbles in situ under US radiation for extended time. The Janus NPs were fabricated from porous silicon (PSi) that was modified via a nanostopper technique. The technique was exploited to prepare PSi NPs which had hydrophobic pore walls (inner face) while the external surfaces of the NPs (outer face) were hydrophilic...
September 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28921173/maximizing-safe-resections-the-roles-of-5-aminolevulinic-acid-and-intraoperative-mr-imaging-in-glioma-surgery-review-of-the-literature
#3
REVIEW
Eric Suero Molina, S Schipmann, W Stummer
Malignant glioma surgery involves the challenge of preserving the neurological status of patients harboring these lesions while pursuing a maximal tumor resection, which is correlated with overall and progression-free survival. Presently, several tools exist for assisting neurosurgeons in visualizing malignant tissue. Fluorescence-guided surgery (FGS) with 5-aminolevulinic acid (5-ALA) has increasingly been used during the last decade for identifying malignant glioma. Intraoperative magnetic resonance imaging (iMRI), first introduced in the mid-1990s, is being evaluated as a further tool to maximize the extent of resection...
September 18, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/28914777/the-usefulness-of-contrast-enhanced-ultrasound-in-the-assessment-of-early-kidney-transplant-function-and-complications
#4
REVIEW
Sara Álvarez Rodríguez, Vital Hevia Palacios, Enrique Sanz Mayayo, Victoria Gómez Dos Santos, Víctor Díez Nicolás, María Dolores Sánchez Gallego, Javier Lorca Álvaro, Francisco Javier Burgos Revilla
OBJECTIVES: The routine diagnostic method for assessment of renal graft dysfunction is Doppler ultrasound. However, contrast-enhanced ultrasound (CEUS) may provide more information about parenchymal flow and vascular status of kidney allografts. The aim of the study was to assess the effectiveness of CEUS in the immediate post-transplant period, focusing on acute vascular complications. A brief review of available literature and a report of our initial experience is made. MATERIAL AND METHODS: 15 kidney transplant (KT) cases with clinical suspicion of acute surgical complication were assessed with CEUS and conventional Doppler ultrasound (US)...
September 15, 2017: Diagnostics
https://www.readbyqxmd.com/read/28914752/ct-attenuation-of-pericoronary-adipose-tissue-in-normal-versus-atherosclerotic-coronary-segments-as-defined-by-intravascular-ultrasound
#5
Mohamed Marwan, Michaela Hell, Annika Schuhbäck, Sören Gauss, Daniel Bittner, Tobias Pflederer, Stephan Achenbach
BACKGROUND: The factors influencing genesis of atherosclerosis at specific regions within the coronary arterial system are currently uncertain. Local mechanical factors such as shear stress as well as metabolic factors, including inflammatory mediators released from epicardial fat, have been proposed. We analyzed computed tomographic (CT) attenuation of pericoronary adipose tissue in normal versus atherosclerotic coronary segments as defined by intravascular ultrasound (IVUS). PATIENTS AND METHODS: We evaluated the data sets of 29 patients who were referred for invasive coronary angiography and in whom IVUS of 1 coronary vessel was performed for clinical reasons...
September 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28914617/distribution-patterns-of-the-vulnerable-vessels-around-cervical-nerve-roots-a-computed-tomography-based-study
#6
Donghwi Park
OBJECTIVE: The aim of the study was to evaluate the prevalence of vulnerable vessels around the target of cervical transforaminal epidural steroid injection at the C3-C7 cervical nerve root levels in a clinical setting. DESIGN: Retrospective, cross-sectional study was conducted. PARTICIPANTS: Patients complaining of neck or arm pain with no previous surgical history and who had undergone both precontrast and contrast-enhanced neck computed tomography were included retrospectively...
September 13, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28912893/the-role-of-nitric-oxide-during-sonoreperfusion-of-microvascular-obstruction
#7
Francois T H Yu, Xucai Chen, Adam C Straub, John J Pacella
Rationale: Microembolization during PCI for acute myocardial infarction can cause microvascular obstruction (MVO). MVO severely limits the success of reperfusion therapies, is associated with additional myonecrosis, and is linked to worse prognosis, including death. We have shown, both in in vitro and in vivo models, that ultrasound (US) and microbubble (MB) therapy (termed "sonoreperfusion" or "SRP") is a theranostic approach that relieves MVO and restores perfusion, but the underlying mechanisms remain to be established...
2017: Theranostics
https://www.readbyqxmd.com/read/28911220/contrast-enhanced-ultrasound-ceus-liver-imaging-reporting-and-data-system-li-rads-2017-a-review-of-important-differences-compared-to-the-ct-mri-system
#8
Tae Kyoung Kim, Seung Yeon Noh, Stephanie R Wilson, Yuko Kono, Fabio Piscaglia, Hyun-Jung Jang, Andrej Lyshchik, Christoph F Dietrich, Juergen K Willmann, Alexander Vezeridis, Claude B Sirlin
Medical imaging plays an important role in the diagnosis and management of hepatocellular carcinoma (HCC). The Liver Imaging Reporting and Data System (LI-RADS) was initially created to standardize the reporting and data collection of CT and MR imaging for patients at risk for HCC. As contrast-enhanced ultrasound (CEUS) has been widely used in clinical practice, it has recently been added to the LI-RADS. While CEUS LI-RADS shares fundamental concepts with CT/MRI LI-RADS, there are key differences between the modalities reflecting dissimilarities in the underlying methods of image acquisition and types of contrast material...
September 15, 2017: Clinical and Molecular Hepatology
https://www.readbyqxmd.com/read/28905338/endoscopic-ultrasound-guided-choledochoduodenostomy-with-novel-use-of-contrast-enhanced-harmonic-imaging
#9
Kosuke Minaga, Mamoru Takenaka, Ken Kamata, Takeshi Miyata, Kentaro Yamao, Hajime Imai, Masatoshi Kudo
No abstract text is available yet for this article.
September 13, 2017: Endoscopy
https://www.readbyqxmd.com/read/28905091/added-value-of-dedicated-axillary-hybrid-18f-fdg-pet-mri-for-improved-axillary-nodal-staging-in-clinically-node-positive-breast-cancer-patients-a-feasibility-study
#10
Thiemo J A van Nijnatten, B Goorts, S Vöö, M de Boer, L F S Kooreman, E M Heuts, J E Wildberger, F M Mottaghy, M B I Lobbes, M L Smidt
PURPOSE: To investigate the feasibility and potential added value of dedicated axillary 18F-FDG hybrid PET/MRI, compared to standard imaging modalities (i.e. ultrasound [US], MRI and PET/CT), for axillary nodal staging in clinically node-positive breast cancer. METHODS: Twelve patients with clinically node-positive breast cancer underwent axillary US and dedicated axillary hybrid 18F-FDG PET/MRI. Nine of the 12 patients also underwent whole-body PET/CT. Maximum standardized uptake values (SUVmax) were measured for the primary breast tumor and the most FDG-avid axillary lymph node...
September 14, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28902753/nonoperative-management-and-novel-imaging-for-posterior-circumflex-humeral-artery-injury-in-volleyball
#11
Daan van de Pol, R Nils Planken, Aart Terpstra, Marja Pannekoek-Hekman, P Paul F M Kuijer, Mario Maas
We report on a 34-yr-old male elite volleyball player with symptomatic emboli in the spiking hand from a partially thrombosed aneurysm of the posterior circumflex humeral artery (PCHA) in his dominant shoulder. At initial diagnosis and follow-up, a combination of time-resolved and high-resolution steady state contrast-enhanced magnetic resonance angiography (CE-MRA) enabled detailed visualization of: (1) emboli that were not detectable by vascular ultrasound; and (2) the PCHA aneurysm, including compression during abduction and external rotation (ABER provocation)...
September 2017: Current Sports Medicine Reports
https://www.readbyqxmd.com/read/28894889/influence-of-contrast-enhanced-ultrasound-administration-setups-on-microbubble-enhancement-a-focus-on-pediatric-applications
#12
Michael R Kramer, Nishi Bhagat, Susan J Back, Laura Poznick, Flemming Forsberg, Kassa Darge, John R Eisenbrey
BACKGROUND: In pediatrics, contrast-enhanced ultrasound offers high-quality imaging with an excellent safety profile. OBJECTIVE: To investigate the effects of varying intravenous administration setups on in vitro enhancement and concentration of two commercially available ultrasound contrast agents, taking into consideration potential pediatric applications. MATERIALS AND METHODS: We quantified in vitro enhancement using a flow phantom (ATS Laboratories, Bridgeport, CT) and Acuson S3000 ultrasound system (Siemens Healthineers, Mountain View, CA) with a 9L4 probe in Cadence pulse sequencing mode...
September 11, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/28892908/cytological-diagnosis-of-an-uncommon-high-grade-malignant-thyroid-tumour-a-case-report
#13
Ruchi Nagpal, Manju Kaushal, Sawan Kumar
Anaplastic Thyroid Carcinoma (ATC) is a relatively uncommon highly malignant tumour originating from the follicular cells of thyroid gland having poor prognosis. It accounts for 2% to 5% of all thyroid carcinomas and patients typically present with a rapidly growing anterior neck mass with aggressive symptoms. A 53-year-old male presented with diffuse neck swelling measuring 8x6 cm and right cervical lymph node measuring 2x2 cm since one month which was associated with dyspepsia and dyspnoea. Ultrasound and Contrast Enhanced Computed Tomography (CECT) neck revealed enlarged right lobe of thyroid and multiple enlarged cervical lymph nodes with soft tissue density nodules in bilateral lungs...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28889941/ultrasonic-characteristics-and-cellular-properties-of%C3%A2-anabaena-gas-vesicles
#14
Yaoheng Yang, Zhihai Qiu, Xuandi Hou, Lei Sun
Ultrasound imaging is a common modality in clinical examination and biomedical research, but has not played a significant role in molecular imaging for lack of an appropriate contrast agent. Recently, biogenic gas vesicles (GVs), naturally formed by cyanobacteria and haloarchaea, have exhibited great potential as an ultrasound molecular imaging probe with a much smaller size (∼100 nm) and improved imaging contrast. However, the basic acoustic and biological properties of GVs remain unclear, which hinders future application...
September 7, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28887861/ultrasound-guided-intratumoral-radiofrequency-ablation-coagulation-to-facilitate-meningioma-resection-preliminary-experience
#15
Li Yan, Junle Yang, Xiaodong Zhou, Guangbin He, Yu Zheng, Yali Zhu, Weiping Liu, Wen Luo, Haiying Qin, Haijing Liu, Xicai Yi, Yin Zhou
OBJECTIVES: This study aimed to explore the feasibility and safety of intratumoral radiofrequency ablation (RFA) in meningioma resection. METHODS: This study was approved by the Xijing Ethics Committee, and informed consent was obtained from all of the patients. Thirteen patients with meningiomas were recruited in the Neurosurgery Department of Xijing Hospital. These patients were treated with intratumoral RFA and surgery. We also chose 13 patients with meningiomas treated with traditional surgery as the control group...
September 9, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28887258/case-report-severe-acute-type-b-aortic-dissection-complicated-by-acute-pancreatitis
#16
Jin Jie, Wu Yongfa, Wang Yuxin, Liao Mingfang, Qu Lefeng
A 52 year-old man presented with sudden abdominal pain and intermittent vomiting. The patient underwent contrast-enhanced computed tomography scan (CT) and was diagnosed with an acute type B aortic dissection (ABAD) involving the celiac trunk superior mesenteric artery (SMA), and extending to the renal artery. The patient was treated with thoracic endovascular aortic repair (TEVAR). After the procedure, the patient still complained of left upper abdomen abdominal pain, and an abdominal mass was detected on physical examination...
September 5, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28887222/contrast-enhanced-ultrasound-imaging-can-predict-vascular-targeted-photodynamic-therapy-induced-tumor-necrosis-in-small-animals
#17
F H Cornelis, K Kim, J C Durack, S Jebiwott, A Scherz, G Srimathveeravalli, J A Coleman
AIMS: To evaluate the accuracy of contrast-enhanced ultrasound (CEUS) for monitoring tumor necrosis following WST-11 vascular targeted photodynamic therapy (VTP) using imaging-pathology correlation. METHODS: Renal adenocarcinoma cells were injected into the hindlimb of 13 BalB/c mice resulting in tumors ranging from 9.8 to 194.3mm(3). US guidance was used to place a laser fiber into the tumor, and VTP was performed. CEUS was performed prior to animal sacrifice, 24hours post-VTP...
September 5, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28886723/pancreatic-injury-in-children-a-case-report-and-review-of-the-literature
#18
Fayza Haider, Mohammed Amin Al Awadhi, Eizat Abrar, Mooza Al Dossari, Hasan Isa, Husain Nasser, Hakima Al Hashimi, Sharif Al Arayedh
BACKGROUND: Trauma is the main cause of morbidity and mortality in the pediatric population. Blunt trauma to the abdomen accounts for the majority of abdominal injuries in children. Pancreatic injury, although uncommon (2 to 9%), is the fourth most common solid organ injury. Unlike other solid organ injuries, pancreatic trauma may be subtle and difficult to diagnose. Computed tomography currently is the imaging modality of choice. As the incidence of pancreatic injury in children sustaining blunt abdominal trauma is low, management remains a challenge...
September 9, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28885212/comparison-of-computed-tomography-ct-and-contrast-enhanced-ultrasound-ceus-for-the-quantitative-evaluation-of-an-ablation-defect-following-radiofrequency-ablation-of%C3%A2-malignant-liver-lesions
#19
K Brünn, L Beyer, M Haimerl, B Pregler, C Stroszczynski, E M Jung, P Wiggermann
OBJECTIVE: To compare contrast-enhanced computed tomography (CT) and contrast-enhanced ultrasound (CEUS) for the quantitative evaluation of an ablation defect following radiofrequency ablation of malignant liver lesions in a prospective study. MATERIALS AND METHODS: 22 radiofrequency ablations of malignant liver tumors were performed. The ablation defects were then measured and evaluated by two independent examiners via contrast-enhanced computed tomography (CT) and contrast-enhanced ultrasound (CEUS) using a 1-5 MHz multifrequency convex ultrasound transducer (LOGIQ E9, GE) with respect to the short-axis diameter, the long-axis diameter, and the area...
September 4, 2017: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/28885211/postoperative-control-of-functional-muscle-flaps-for-facial-palsy-reconstruction-ultrasound-guided-tissue-monitoring-using-contrast-enhanced-ultrasound-ceus-and-ultrasound-elastography
#20
A Kehrer, V Mandlik, C Taeger, S Geis, L Prantl, E M Jung
BACKGROUND AND OBJECTIVES: Facial paralysis causes excruciating impairments including facial asymmetry, limited eye closure, oral incontinence and social dysfunction. Modern plastic surgical reconstructions render favorable results with well-perfused dynamic muscle flaps. Post-operative tissue monitoring is a critical determinant for success. Contrast-enhanced Ultrasound (CEUS) and elastography have proven superior properties to evaluate tissue perfusion in various organs. We evaluated their role for functional muscle flaps positioned at the sub-skin level in facial palsy patients...
September 4, 2017: Clinical Hemorheology and Microcirculation
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