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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/28919613/non-invasively-measured-carotid-artery-intima-medial-thickness-may-be-a-more-useful-marker-of-coronary-artery-disease-in-diabetic-than-non-diabetic-patients
#4
C M Ahmed, M K Hasan, B C Goswami, S K Banerjee, M F Rahman, H H Samira, D F Osmani, M N Hasan
Carotid intima-medial thickness has long been proposed as a surrogate marker of atherosclerotic vascular disease in other vascular beds, most notably the coronary arteries with its practical implications. This observational study aimed at exploring the relationship of a hypothetical stronger relationship of carotid intima-medial thickness with coronary artery disease in diabetic patients than non-diabetic counterparts. Thirty diabetic patients and 74 non-diabetic patients who were referred for coronary angiogram in the Departments of Cardiology Bangabandhu Sheikh Mujib Medical University and Combined Military Hospital, Dhaka Cantonment, Bangladesh from January, 2002 and December, 2003 were studied...
July 2017: Mymensingh Medical Journal: MMJ
https://www.readbyqxmd.com/read/28918858/coronary-ct-angiography-features-of-ruptured-and-high-risk-atherosclerotic-plaques-correlation-with-intra-vascular-ultrasound
#5
Daniel R Obaid, Patrick A Calvert, Adam Brown, Deepa Gopalan, Nick E J West, James H F Rudd, Martin R Bennett
BACKGROUND: Features of ruptured and high-risk plaque have been described on coronary computed tomography angiography (coronary CTA), but not systematically assessed against intravascular ultrasound (IVUS). We examined the ability of coronary CTA to identify IVUS defined ruptured plaque and Virtual Histology Intravascular Ultrasound (VH-IVUS) defined thin-cap fibroatheroma (TCFA). METHODS: Sixty-three patients (32 with acute coronary syndrome and 31 with stable angina) underwent coronary CTA, IVUS and VH-IVUS...
September 5, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28916501/awakenings-in-rats-by-ultrasounds-a-new-animal-model-for-paradoxical-kinesia
#6
Luan Castro Tonelli, Markus Wöhr, Rainer Schwarting, Liana Melo-Thomas
Paradoxical kinesia refers to a sudden transient ability of akinetic patients to perform motor tasks they are otherwise unable to perform. The mechanisms underlying this phenomenon are unknown due a paucity of valid animal models that faithfully reproduce paradoxical kinesia. Here, in a first experiment, we present a new method to study paradoxical kinesia by "awakening" cataleptic rats through presenting appetitive 50-kHz ultrasonic vocalizations (USV), which are typical for social situations with positive valence, like juvenile play or sexual encounters ("rat laughter")...
September 12, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28915951/male-contraception-prospects-for-sound-and-ultrasound
#7
Robert Sewak, Bettina Teng, Lee A Learman, Charles H Hennekens
The worldwide human population growth rate, which doubled during the 20th century, as well as the increasing fertility rate, have contributed to an increasing and evolving emphasis on contraception. With respect to female contraceptive methods, many have been developed, marketed, and are widely available. In contrast, male contraception has been limited to condoms, which pose logistical challenges, and vasectomy, which is largely irreversible. The use of sound to achieve effective and safe male contraception is a promising but unproven hypothesis...
September 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28914777/the-usefulness-of-contrast-enhanced-ultrasound-in-the-assessment-of-early-kidney-transplant-function-and-complications
#8
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
#9
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
#10
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
#11
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
#12
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/28910168/reduced-central-retinal-artery-blood-flow-is-related-to-impaired-central-visual-function-in-retinitis-pigmentosa-patients
#13
Samantha Kayser, Patricia Vargas, Deborah Mendelsohn, Jorge Han, Hua Bi, Alexandra Benavente, Ava K Bittner
PURPOSE: We evaluated the test-retest repeatability of blood flow velocities in the retrobulbar central retinal artery (CRA) and explored whether reduced blood flow is related to the degree of visual function loss in retinitis pigmentosa (RP) patients with wide range of disease severity. MATERIALS AND METHODS: We measured CRA peak systolic velocity (PSV) and end diastolic velocity (EDV) to calculate mean flow velocity (MFV) in 18 RP patients using color Doppler imaging with spectral flow Doppler (GE Logiq7 ultrasound) twice in each eye at each of two visits within a month...
September 14, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28905338/endoscopic-ultrasound-guided-choledochoduodenostomy-with-novel-use-of-contrast-enhanced-harmonic-imaging
#14
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
#15
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/28904809/magnetic-resonance-imaging-performance-for-diagnosis-of-ovarian-torsion-in-pregnant-women-with-stimulated-ovaries
#16
Elizabeth Asch, Jesse Wei, Koenraad J Mortele, Kathryn Humm, Kim Thornton, Deborah Levine
BACKGROUND: To determine if asymmetric ovarian edema on non-contrast MRI can be used to distinguish torsed from non-torsed stimulated ovaries in pregnant women. METHODS: In this retrospective study, our radiology database was searched for women who were pregnant and who had undergone ovarian stimulation and underwent MRI abdomen/pelvis from 1/2000-12/2012. At our institution, ultrasound is typically performed as a first line study for pregnant women with pelvic pain, with MR for those patients with indeterminate findings...
2017: Fertility Research and Practice
https://www.readbyqxmd.com/read/28903473/baseline-anatomical-assessment-of-the-uterus-and-ovaries-in-infertile-women-a-systematic-review-of-the-evidence-on-which-assessment-methods-are-the-safest-and-most-effective-in-terms-of-improving-fertility-outcomes
#17
Sarah C Armstrong, Marian Showell, Elizabeth A Stewart, Robert W Rebar, Sheryl Vanderpoel, Cynthia M Farquhar
BACKGROUND: This review focuses on the initial presentation of women who suspect that they are infertile, and how best to assess the anatomy of their uterus and ovaries in order to investigate the cause of their infertility, and potentially improve desired fertility outcomes. This review was undertaken as part of a World Health Organization initiative to assess the evidence available to address guidance for the diagnosis and treatment of infertility within a global context. Providing access to care for infertile women will help to ease the psycho-social burdens, such as ostracization, intimate partner violence and other negative consequences of being involuntarily childless or unable to become pregnant despite desiring a biological child or children...
September 1, 2017: Human Reproduction Update
https://www.readbyqxmd.com/read/28902753/nonoperative-management-and-novel-imaging-for-posterior-circumflex-humeral-artery-injury-in-volleyball
#18
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/28901951/real-time-non-rigid-target-tracking-for-ultrasound-guided-clinical-interventions
#19
Cornel Zachiu, Mario G Ries, Pascal Ramaekers, Jean-Luc Guey, Chrit T W Moonen, Baudouin Denis de Senneville
Biological motion is a problem for non- or mini-invasive interventions when conducted in mobile/deformable organs due to the targeted pathology moving/deforming with the organ. This may lead to high miss rates and/or incomplete treatment of the pathology. Therefore, real-time tracking of the target anatomy during the intervention would be beneficial for such applications. Since the aforementioned interventions are often conducted under B-mode ultrasound (US) guidance, target tracking can be achieved via image registration, by comparing the acquired US images to a separate image established as positional reference...
September 13, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28894946/an-international-survey-on-non-invasive-techniques-to-assess-the-microcirculation-in-patients-with-raynaud-s-phenomenon-sunshine-survey
#20
Francesca Ingegnoli, Nicola Ughi, Graham Dinsdale, Annalisa Orenti, Patrizia Boracchi, Yannick Allanore, Ivan Foeldvari, Alberto Sulli, Maurizio Cutolo, Vanessa Smith, Ariane L Herrick
To canvas opinion concerning the role of non-invasive techniques in the assessment of patients with Raynaud's phenomenon (Rp) in clinical and research settings: four nailfold capillaroscopy methods [videocapillaroscopy (NVC), dermoscopy, stereomicroscopy, digital USB microscopy], four laser Doppler methods (laser Doppler flowmetry, imaging, anemometry/velocimetry, laser speckle contrast analysis), thermographic imaging, and upper limb arterial Doppler ultrasound. Emails with a link to the survey were sent to physicians from the European Scleroderma Trials and Research group (EUSTAR), the EULAR Study Group on Microcirculation in Rheumatic Diseases (SG_MC/RD) and members of the pediatric rheumatology Email board...
September 11, 2017: Rheumatology International
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