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https://www.readbyqxmd.com/read/28803687/predictors-of-asymptomatic-radiation-induced-abdominal-atherosclerosis
#1
L Cella, R Liuzzi, P Romanelli, M Conson, V D'Avino, M Ottaviano, V Damiano, G Palmieri, R Pacelli, M Mancini
AIMS: To identify predictors of asymptomatic radiation-induced abdominal atherosclerosis in patients treated with radiotherapy and evaluated by abdominal vascular ultrasonography. MATERIALS AND METHODS: Forty-two testicular classic seminoma patients (median age 34 years, range 16-56) undergoing radical inguinal orchiectomy were analysed. Twenty-six patients underwent post-surgery radiotherapy (median total dose 25 Gy, range 25-43), two of them also received chemotherapy (CHT) and 16 patients were treated with surgery alone or by surgery followed by CHT (control group)...
August 10, 2017: Clinical Oncology: a Journal of the Royal College of Radiologists
https://www.readbyqxmd.com/read/28799447/a-higher-volume-of-fibrotic-tissue-on-virtual-histology-prior-to-coronary-stent-implantation-predisposes-to-more-pronounced-neointima-proliferation
#2
Steven Haine, Kristien Wouters, Hielko Miljoen, Tom Vandendriessche, Marc Claeys, Johan Bosmans, Christiaan Vrints
BACKGROUND: Since neointima smooth muscle cells (SMC) mainly originate from the vessel wall, we investigated whether atherosclerotic plaque composition influences subsequent in-stent neointima proliferation and restenosis. METHODS: We performed intravascular ultrasound (IVUS) with virtual histology in 98 patients prior to elective bare-metal stent (BMS) implantation in de novo coronary artery lesions. Virtual histology variables pre-percutaneous coronary intervention (PCI) were related to in-stent neointima proliferation six months after implantation assessed as late luminal loss of 0...
August 11, 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/28796644/magnetic-targeting-to-enhance-microbubble-delivery-in-an-occluded-microarterial-bifurcation
#3
Marie de Saint Victor, Dario Carugo, Lester C Barnsley, Joshua Owen, Constantin C Coussios, Eleanor Stride
Ultrasound and microbubbles have been shown to accelerate the breakdown of blood clots both in vitro and in vivo. Clinical translation of this technology is still limited, however, in part by inefficient microbubble delivery to the thrombus. This study examines the obstacles to delivery posed by fluid dynamic conditions in occluded vasculature and investigates whether magnetic targeting can improve microbubble delivery. A two-dimensional computational fluid dynamic (CFD) model of a fully occluded Y-shaped microarterial bifurcation was developed to determine: (i) the fluid dynamic field in the vessel with inlet velocities from 1-100mm/s (corresponding to Reynolds numbers 0...
August 10, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28796606/directional-transverse-oscillation-vector-flow-estimation
#4
Jorgen Arendt Jensen
A method for estimating vector velocities using transverse oscillation (TO) combined with directional beamforming is presented. In directional TO (DTO), a normal focused field is emitted and the received signals are beamformed in the lateral direction transverse to the ultrasound beam to increase the amount of data for vector velocity estimation. The approach is self-calibrating as the lateral oscillation period is estimated from the directional signal through a Fourier transform to yield quantitative velocity results over a large range of depths...
August 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28795494/an-extended-high-frequency-ultrasound-protocol-for-detection-of-vessel-wall-inflammation
#5
H Zachrisson, C Svensson, A Dremetsika, P Eriksson
OBJECTIVE: The aim of this study was to evaluate an extended protocol of the large vessels using high-frequency duplex ultrasound (DUS) for detection of vessel wall inflammation. METHODS: Fifty-eight patients performed a DUS examination where arteritis could not be excluded. All DUS examinations were performed using ACUSON S2000 TM ultrasound system (Siemens Medical Solutions USA, Inc.). High-frequency linear transducers were used (18L6 MHz, 9L4MHz) or curve linear for the aortic arch (6C2 MHz)...
August 9, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/28794812/endovascular-management-of-superior-mesenteric-artery-sma-aneurysm-adequate-access-is-essential-for-success-case-report
#6
Lovro Tkalčić, Berislav Budiselić, Miljenko Kovačević, Siniša Knežević, Slavica Kovačić, Damir Miletić, Vjekoslav Tomulić, Dimitrij Kuhelj
BACKGROUND: An aneurysm of the superior mesenteric artery (SMA) with a diameter of 2.2 cm was found incidentally on an ultrasound (US) examination in a 26-year-old woman. The only known risk factor was an intracranial aneurysm that was found on her grandmother's autopsy. Based on pregnancy planning and the current literature, endovascular management with a covered stent was proposed. CASE REPORT: Self-expandable, covered stent (Bard, Fluency(®)) was implanted using a single transfemoral approach...
2017: Polish Journal of Radiology
https://www.readbyqxmd.com/read/28794614/accuracy-of-b-scan-ultrasonography-in-acute-fundus-obscuring-vitreous-hemorrhage-using-a-standardized-scanning-protocol-and-a-dedicated-ophthalmic-ultrasonographer
#7
Maria T Sandinha, Ajay K Kotagiri, Rona I Owen, Caspar Geenen, David Hw Steel
PURPOSE: To assess the accuracy of B-scan ultrasound (U/S) in diagnosing cases of acute fundus obscuring vitreous hemorrhage (FOVH) using a standardized scan protocol and dedicated ophthalmic ultrasonographer. METHODS: Consecutive patients presenting with acute FOVH of unknown cause, between January 2013 and December 2014, were prospectively recruited. Patients underwent a scan performed by a dedicated ultrasonographer, utilizing a systematic scan sequence and using an ocular specific U/S device...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28794001/randomized-comparison-of-ridaforolimus-eluting-and-zotarolimus-eluting-coronary-stents-in-patients-with-coronary-artery-disease-primary-results-from-the-bionics-trial
#8
David E Kandzari, Pieter C Smits, Michael P Love, Ori Ben-Yehuda, Shmuel Banai, Simon D Robinson, Michael Jonas, Ran Kornowski, Rodrigo Bagur, Andres Iniguez, Haim D Danenberg, Robert L Feldman, Rajiv Jauhar, Harish Chandna, Manish A Parikh, Gidon Y Perlman, Mercedes Balcells, Peter M Markham, Melek Ozgu Ozan, Philippe Genereux, Elazer Edelman, Martin B Leon, Gregg W Stone
Background -The safety and efficacy of a novel cobalt alloy-based coronary stent with a durable elastomeric polymer eluting the antiproliferative agent ridaforolimus for treatment of patients with coronary artery disease is undetermined. Methods -A prospective, international 1:1 randomized trial was conducted to evaluate in a noninferiority design the relative safety and efficacy of ridaforolimus-eluting stents (RES) and slow-release zotarolimus-eluting stents (ZES) among 1,919 patients at 76 centers undergoing percutaneous coronary intervention...
August 9, 2017: Circulation
https://www.readbyqxmd.com/read/28792891/feasibility-and-validation-of-4-d-pulse-wave-imaging-in-phantoms-and-in-vivo
#9
Iason Z Apostolakis, Pierre Nauleau, Clement Papadacci, Matthew D McGarry, Elisa E Konofagou
Pulse wave Imaging (PWI) is a noninvasive technique for tracking the propagation of the pulse wave along the arterial wall. 3-D ultrasound imaging would aid in objectively estimating the PulseWave Velocity (PWV) vector. This study aims to introduce a novel PWV estimation method along the propagation direction, validate it in phantoms and test its feasibility in vivo. A silicone vessel phantom consisting of a stiff and a soft segment along the longitudinal axis and and a silicone vessel with a plaque were constructed...
August 3, 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28792107/intrafetal-laser-for-embryo-reduction-from-dichorionic-triplets-to-dichorionic-twins
#10
Petya Chaveeva, Gergana Peeva, Savino Gil Pugliese, Atanas Shterev, Kypros H Nicolaides
OBJECTIVE: To report the outcome of dichorionic (DC) triplet pregnancies reduced to DC twins by laser ablation of the pelvic vessels of one of the monochorionic twins. METHODS: Intrafetal laser embryo reduction (ER) from DC triplet to DC twins was carried out in 61 pregnancies at 11(+0) - 14(+3) weeks' gestation. Pregnancy outcome was examined and compared to previous studies in DC triplets managed expectantly or by ER to twins or singleton with fetal intracardiac injection of potassium chloride (KCl)...
August 9, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28790934/skin-lesions-in-swine-with-decompression-sickness-clinical-appearance-and-pathogenesis
#11
Long Qing, Dinesh K Ariyadewa, Hongjie Yi, Yewei Wang, Quan Zhou, Weigang Xu
Skin lesions are visual clinical manifestations of decompression sickness (DCS). Comprehensive knowledge of skin lesions would give simple but strong clinical evidence to help diagnose DCS. The aim of this study was to systematically depict skin lesions and explore their pathophysiological basis in a swine DCS model. Thirteen Bama swine underwent simulated diving in a hyperbaric animal chamber with the profile of 40 msw-35 min exposure, followed by decompression in 11 min. After decompression, chronological changes in the appearance of skin lesions, skin ultrasound, temperature, tissue nitric oxide (NO) levels, and histopathology were studied...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28782187/sensitive-three-dimensional-ultrasound-assessment-of-carotid-atherosclerosis-by-weighted-average-of-local-vessel-wall-and-plaque-thickness-change
#12
Jieyu Cheng, Eranga Ukwatta, Shadi Shavakh, Tommy W S Chow, Grace Parraga, J David Spence, Bernard Chiu
PURPOSE: Vitamin B deficiency has been identified as a risk factor for vascular events. However, the reduction of vascular events was not shown in large randomized controlled trials evaluating B-Vitamin therapy. There is an important requirement to develop sensitive biomarkers to be used as efficacy targets for B-Vitamin therapy as well as other dietary treatments and lifestyle regimes that are being developed. Carotid vessel-wall-plus-plaque thickness change (VWT-Change) measured from 3D ultrasound has been shown to be sensitive to atorvastatin therapies in previous studies...
August 7, 2017: Medical Physics
https://www.readbyqxmd.com/read/28781024/intraluminal-intensity-of-blood-speckle-on-intravascular-ultrasound-a-novel-predictor-of-periprocedural-myocardial-injury-after-coronary-stenting
#13
Yoshiyuki Okuya, Yuichi Saito, Hideki Kitahara, Takashi Nakayama, Yoshihide Fujimoto, Yoshio Kobayashi
The difference in the intraluminal intensity of blood speckle (IBS) on integrated backscatter-intravascular ultrasound (IB-IVUS) across a coronary artery stenosis (i.e., ΔIBS) has previously shown a negative correlation with fractional flow reserve, reflecting an impaired coronary blood flow. Periprocedural myocardial injury (PMI) after coronary stenting has also been associated with coronary circulatory dysfunction. The aim of this study was to investigate the relation between ΔIBS after coronary stenting and PMI...
July 14, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28778096/intravascular-ultrasound-guidance-in-drug-eluting-stents-implantation-a-meta-analysis-and-trial-sequential-analysis-of-randomized-controlled-trials
#14
Cheng Qian, Hong Feng, Jianlei Cao, Guangyu Zhang, Yanggan Wang
OBJECTIVE: Previous evidence suggested that intravascular ultrasound (IVUS) guidance could improve outcomes after drug-eluting stents (DES) placement, largely driven by data from observational studies. We, therefore, performed a meta-analysis and trial sequential analysis of randomized controlled trials to overcome this limitation. RESULTS: The retrieval process yielded 7 RCTs with 3,192 patients. Compared to the angiography guidance, IVUS-guided DES implantation was associated with a significant reduction in the major adverse cardiac events (MACE) (OR 0...
July 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28777893/age-related-vascularization-and-ossification-of-joints-in-children-an-international-pilot-study-to-test-multi-observer-ultrasound-reliability
#15
Daniel Windschall, Paz Collado, Jelena Vojinovic, Silvia Magni-Manzoni, Peter Balint, George A W Bruyn, Cristina Hernandez-Diaz, Juan Carlos Nieto, Viviana Ravagnani, Nikolay Tzaribachev, Annamaria Iagnocco, Maria Antonietta D'Agostino, Esperanza Naredo
OBJECTIVE: To determine the intra- and inter-observer reliability of ultrasound (US)-detected age-related joint vascularization and ossification grading in healthy children. METHODS: Following standardized image acquisition and machine setting protocols, 10 international US experts examined four joints (wrist, second metacarpophalangeal joint, knee, and ankle) in 12 healthy children (divided into four age groups: 2-4, 5-8, 9-12, and 13-16 years). Grey-scale was used to detect the ossification grade, and power Doppler (PD) US was used to detect physiological vascularization...
August 4, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/28772277/factors-to-consider-when-deciding-on-the-type-of-free-flap-reconstruction-of-head-and-neck-soft-tissue-defects
#16
Mohammed Thabet Aladimi, Bo Han, Chunjie Li, Hussein Helal, Zhenjie Gao, Longjiang Li
OBJECTIVES: The aim of the study was to evaluate the functional and aesthetic outcomes on donor and recipient sites and to determine the effects of technical factors including flap thickness and vessel diameters measured by ultrasonography as well as the size of the defect and postoperative volume reduction of the flaps measured by magnetic resonance imaging (MRI). METHODS: In patients who had undergone soft tissue reconstructive surgery between March 2013 and March 2016 using 55 anterolateral thigh flaps (ALTFs), 30 radial forearm flaps (RFFs), and 18 latissimus dorsi flaps (LDFs), color Doppler ultrasonography was performed to measure the thickness of the flap at the site of the perforator...
August 4, 2017: ORL; Journal for Oto-rhino-laryngology and its related Specialties
https://www.readbyqxmd.com/read/28772005/the-effects-of-antioxidants-on-ocular-blood-flow-in-patients-with-glaucoma
#17
Alon Harris, Josh Gross, Nicholas Moore, Thai Do, Amelia Huang, Willy Gama, Brent Siesky
PURPOSE: To investigate the effects of an antioxidant dietary supplement that includes Ginkgo biloba, on retinal and retrobulbar blood flow in patients with open-angle glaucoma (OAG). METHODS: Forty-five patients with confirmed OAG were enroled in a randomized, double blinded, placebo-controlled cross-over study. Baseline and postadministration measurements of intraocular pressure (IOP), ocular perfusion pressure (OPP), retrobulbar blood flow, and retinal capillary blood flow were non-invasively measured (ultrasound and laser Doppler modalities, respectively) before and one month after antioxidant nutraceuticals and placebo administration...
August 3, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28767367/3-d-in-vitro-acoustic-super-resolution-and-super-resolved-velocity-mapping-using-microbubbles
#18
Kirsten Christensen-Jeffries, Jemma Brown, Paul Aljabar, Mengxing Tang, Christopher Dunsby, Robert J Eckersley
Standard clinical ultrasound (US) imaging frequencies are unable to resolve microvascular structures due to the fundamental diffraction limit of US waves. Recent demonstrations of 2D super-resolution both in vitro and in vivo have demonstrated that fine vascular structures can be visualized using acoustic single bubble localization. Visualization of more complex and disordered 3D vasculature, such as that of a tumor, requires an acquisition strategy which can additionally localize bubbles in the elevational plane with high precision in order to generate super-resolution in all three dimensions...
July 31, 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28765975/contrast-enhanced-ultrasonography-improves-the-diagnostic-specificity-for-gallbladder-confined-focal-tumors
#19
Bowen Zhuang, Wei Li, Wei Wang, Manxia Lin, Ming Xu, Xiaoyan Xie, Mingde Lu, Xiaohua Xie
PURPOSE: To investigate the value of contrast-enhanced ultrasonography (CEUS) in the differential diagnosis of malignant and benign focal gallbladder diseases confined to the gallbladder wall. METHODS: From July 2006 to May 2016, 88 patients (mean age 48.8 years; age range 18-77 years) were enrolled. All patients had focal gallbladder lesions confined to the gallbladder wall according to CEUS examination. The conventional ultrasound and CEUS characteristics of the lesions were evaluated, and diagnostic performance was evaluated via receiver-operating characteristic (ROC) analysis...
August 1, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28764604/optical-coherence-tomography-to-guide-percutaneous-treatment-of-coronary-bifurcation-disease
#20
Mathias Wolfrum, Giovanni Luigi De Maria, Adrian P Banning
Cardiovascular disease remains the most common cause of death worldwide. Enormous progress in the technology and applicability of percutaneous techniques to treat obstructive coronary heart disease has been made, and the number of percutaneous coronary interventions (PCI) is increasing. Coronary bifurcations are involved in a substantial number of PCIs and despite recent advances, bifurcation PCI remains a challenge in terms of immediate success and long-term outcome. Angiography has a limited capacity for showing important features of the 3 dimensional coronary vessel anatomy, position of stent struts and exact wire positions and is therefore suboptimal for guiding bifurcation PCI...
August 2, 2017: Expert Review of Cardiovascular Therapy
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