keyword
MENU ▼
Read by QxMD icon Read
search

Phase contrast Magnetic

keyword
https://www.readbyqxmd.com/read/28916795/effect-of-pressure-on-normal-and-superconducting-state-properties-of-iron-based-superconductor-prfeaso0-6f-y-y%C3%A2-%C3%A2-0-12-0-14
#1
S Arumugam, C Ganguli, R Thiyagarajan, D Bhoi, G Kalai Selvan, K Manikandan, A Pariari, P Mandal, Y Uwatoko
The effect of high pressure (up to 8 GPa) on normal and superconducting state properties of PrFeAsO0.6F0.12, an 1111-type iron based superconductor close to optimal doped region, has been investigated by measuring the temperature dependence of resistivity. Initially, the superconducting transition temperature (T c ) is observed to increase slowly by about 1 K as pressure (P) increases from 0 to 1.3 GPa. With further increase in pressure above 1.3 GPa, T c decreases at the rate of ~1.5 K/GPa. The normal-state resistivity decreases monotonically up to 8 GPa...
September 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28916603/phase-2a-clinical-trial-of-mitochondrial-protection-elamipretide-during-stent-revascularization-in-patients-with-atherosclerotic-renal-artery-stenosis
#2
Ahmed Saad, Sandra M S Herrmann, Alfonso Eirin, Christopher M Ferguson, James F Glockner, Haraldur Bjarnason, Michael A McKusick, Sanjay Misra, Lilach O Lerman, Stephen C Textor
BACKGROUND: Atherosclerotic renal artery stenosis reduces renal blood flow (RBF) and amplifies stenotic kidney hypoxia. Revascularization with percutaneous transluminal renal angioplasty (PTRA) and stenting often fails to recover renal function, possibly because of ischemia/reperfusion injury developing after PTRA. Elamipretide is a mitochondrial-targeted peptide that binds to cardiolipin and stabilizes mitochondrial function. We tested the hypothesis that elamipretide plus PTRA would improve renal function, oxygenation, and RBF in patients with atherosclerotic renal artery stenosis undergoing PTRA...
September 2017: Circulation. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28914944/first-principles-studies-on-the-effects-of-halogen-adsorption-on-monolayer-antimony
#3
Keat Hoe Yeoh, Tiem Leong Yoon, Duu Sheng Ong, Thong Leng Lim, Yusuf Zuntu Abdullahi
Using first-principles calculations, we carry out systematic studies on the electronic, magnetic and structural properties of halogenated β-phase antimonene. We consider two different levels of halogen adatom coverage i.e. Θ = 1/8 and Θ = 1/18. It is found that F, Cl and Br adatoms act as acceptors whereas the I adatom acts as a donor. For a high coverage of Θ = 1/8, halogenated β-phase antimonene exhibits metallic characteristics. With a lower coverage of Θ = 1/18, through the adsorption of F, Cl and Br the semiconducting unstrained antimonene becomes metallic...
September 15, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28912575/thermodynamics-of-nanodisc-formation-mediated-by-styrene-maleic-acid-2-1-copolymer
#4
Anne Grethen, Abraham Olusegun Oluwole, Bartholomäus Danielczak, Carolyn Vargas, Sandro Keller
Styrene/maleic acid copolymers (SMA) have recently attracted great interest for in vitro studies of membrane proteins, as they self-insert into and fragment biological membranes to form polymer-bounded nanodiscs that provide a native-like lipid-bilayer environment. SMA copolymers are available in different styrene/maleic acid ratios and chain lengths and, thus, possess different charge densities, hydrophobicities, and solubilisation properties. Here, we studied the equilibrium solubilisation properties of the most commonly used copolymer, SMA(2:1), by monitoring the formation of nanodiscs from phospholipid vesicles using (31)P nuclear magnetic resonance spectroscopy, dynamic light scattering, and differential scanning calorimetry...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28906338/a-pharmacokinetics-efficacy-and-safety-study-of-gadoterate-meglumine-in-pediatric-subjects-aged-younger-than-2-years
#5
Mario Scala, Meriam Koob, Sophie de Buttet, Philippe Bourrinet, Mathieu Felices, Elzbieta Jurkiewicz
OBJECTIVES: The primary objective of this study was to investigate the pharmacokinetic profile of gadoterate meglumine in pediatric patients younger than 2 years; the secondary objectives were to document its efficacy and safety. MATERIAL AND METHODS: This was a Phase IV open-label, prospective study conducted in 9 centers (4 countries). Forty-five patients younger than 2 years with normal estimated glomerular filtration rate and scheduled to undergo routine gadolinium-enhanced magnetic resonance imaging (MRI) of any organ were included and received a single intravenous injection of gadoterate meglumine (0...
September 12, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28902795/magnetic-resonance-imaging-of-neuroendocrine-tumor-hepatic-metastases-does-hepatobiliary-phase-imaging-improve-lesion-conspicuity-and-interobserver-agreement-of-lesion-measurements
#6
Brian Morse, Daniel Jeong, Kerry Thomas, Dalanda Diallo, Jonathan R Strosberg
OBJECTIVE: The aim of this study was to determine if magnetic resonance imaging (MRI) performed with hepatobiliary phase imaging results in higher lesion conspicuity and produces lesion measurements with higher interobserver agreement than other MRI sequences when imaging neuroendocrine hepatic metastases. METHODS: Patients who had MRIs with both gadoxetate disodium and gadopentetate dimeglumine contrast within a 6-month span were identified, and 23 hepatic lesions were selected...
October 2017: Pancreas
https://www.readbyqxmd.com/read/28902734/incidental-detection-of-hepatocellular-carcinoma-on-68ga-labeled-prostate-specific-membrane-antigen-pet-ct
#7
D Patel, H Loh, K Le, A Stevanovic, R Mansberg
A 66-year-old man with history of prostate carcinoma underwent Ga-labeled prostate-specific membrane antigen PET/CT for surveillance of rising prostate-specific antigen. Intense tracer uptake was noted in segments 2, 7, and 8 of the liver. The lesions were not FDG avid on F-FDG PET/CT. Further characterization with magnetic resonance cholangiopancreatography with Gd-EOB (Primovist) contrast revealed ill-defined arterially enhancing lesions with central washout in the venous phase. CT-guided core biopsy was performed, and histopathology confirmed well-differentiated hepatocellular carcinoma...
September 11, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28898048/dielectric-meta-holograms-enabled-with-dual-magnetic-resonances-in-visible-light
#8
Zile Li, Inki Kim, Lei Zhang, Muhammad Q Mehmood, Muhammad S Anwar, Murtaza Saleem, Dasol Lee, Ki Tae Nam, Shuang Zhang, Boris Luk'yanchuk, Yu Wang, Guoxing Zheng, Junsuk Rho, Cheng-Wei Qiu
Efficient transmission-type meta-holograms have been demonstrated using high-index dielectric nanostructures based on Huygens' principle. It is crucial that the geometry size of building blocks be judiciously optimized individually for spectral overlap of electric and magnetic dipoles. In contrast, reflection-type meta-holograms using the metal/insulator/metal scheme and geometric phase can be readily achieved with high efficiency and small thickness. Here, we demonstrate a general platform for design of dual magnetic resonance based meta-holograms based on the geometric phase using silicon nanostructures that are quarter wavelength thick for visible light...
September 14, 2017: ACS Nano
https://www.readbyqxmd.com/read/28895422/the-value-of-gd-bopta-enhanced-mris-and-dwi-in-the-diagnosis-of-intrahepatic-mass-forming-cholangiocarcinoma
#9
C C Xu, Y F Tang, X Z Ruan, Q L Huang, L Sun, J Li
The aim of this study is to explore the value of unenhanced magnetic resonance imaging (MRI), gadobenate dimeglumine injection (Gd-BOPTA)-enhanced MRI and diffusion-weighted imaging (DWI) in the diagnosis of intrahepatic mass-forming cholangiocarcinoma (IMCC). Totally 59 IMCC patients who underwent Gd-BOPTA-enhanced MRIs were recruited. The time-signal intensity curves and lesion periphery enhancement rates of the IMCC and liver parenchyma was drawn using apparent diffusion coefficient (ADC) values. The Gd-BOPTA-enhanced MRI showed that the peripheries of 30 lesions in the arterial phase exhibited irregular ring enhancement...
September 12, 2017: Neoplasma
https://www.readbyqxmd.com/read/28895098/recurrent-cerebral-attack-caused-by-thrombosis-in-the-pulmonary-vein-stump-in-a-patient-with-left-upper-lobectomy-on-anticoagulant-therapy-case-report-and-literature-review
#10
Takahito Nakano, Mayumi Inaba, Hiroyuki Kaneda
BACKGROUND: Thrombus formation in the pulmonary vein stump after pulmonary resection has recently been identified as a cause of systemic thrombosis including brain infarction. However, there is limited research focusing on the clinical course of pulmonary vein stump thrombus, and optimal treatment and prevention strategies of this important complication have not been established. CASE PRESENTATION: A 77-year-old woman was diagnosed with lung cancer of the left upper lobe, cT4N2M0, cStage IIIB...
September 11, 2017: Surgical Case Reports
https://www.readbyqxmd.com/read/28887805/quantitative-analysis-of-effects-of-hemodynamic-stress-on-temporal-variations-of-cardiac-phases-in-models-of-human-carotid-bulbs
#11
Tatsunori Saho, Hideo Onishi
In this study, we evaluated the hemodynamics of carotid artery models with carotid bulbs of various sizes using computational fluid dynamics (CFD) and the Fluent CFD software. The oscillatory shear index (OSI) and flow velocity distribution were evaluated in carotid models without a carotid bulb and with carotid bulbs of known geometry (major axis of 10, 11, 12, 13, and 14 mm; carotid bifurcation angle of 50°). Furthermore, the diameters of the common carotid artery, the external carotid artery, and the internal carotid artery were defined as 7...
September 8, 2017: Radiological Physics and Technology
https://www.readbyqxmd.com/read/28886025/robust-phase-retrieval-based-x-ray-tomography-for-morphological-assessment-of-early-hepatic-echinococcosis-infection-in-rats
#12
Huiqiang Liu, Chuanshan Zhang, Xiaoxi Fan, Yingni Duan, Tiqiao Xiao, Guohao Du, Yanan Fu, Haigang Liu, Hao Wen
Propagation-based phase-contrast computed micro-tomography (PPCT) dominates the non-destructive, three-dimensional inner-structure measurement in synchrotron-based biomedical research due to its simple experimental setup. To quantitatively visualize tiny density variations in soft tissues and organs closely related to early pathological morphology, an experimental study of synchrotron-based X-ray PPCT combined with generalized phase and attenuation duality (PAD) phase retrieval was implemented with the hepatic echinococcosis (HE) infection rat model at different stages...
2017: PloS One
https://www.readbyqxmd.com/read/28884520/relative-pressure-estimation-from-velocity-measurements-in-blood-flows-state-of-the-art-and-new-approaches
#13
Cristóbal Bertoglio, Rodolfo Núñez, Felipe Galarce, David Nordsletten, Axel Osses
The relative pressure difference across stenotic blood vessels serves as an important clinical index for the diagnosis of many cardiovascular diseases. While the clinical gold standard for relative pressure difference measurements is invasive catheterization, Phase-Contrast Magnetic Resonance Imaging has emerged as a promising tool for enabling a non-invasive quantification, by linking highly spatially resolved velocity measurements with relative pressures via the incompressible Navier-Stokes equations. In this work we provide a review and analysis of current methods for relative pressure estimation and propose three additional techniques...
September 7, 2017: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/28882338/relationship-of-cardiorespiratory-fitness-and-adiposity-with-left-ventricular-strain-in-middle-age-adults-from-the-dallas-heart-study
#14
Ambarish Pandey, Bryan Park, Spencer Martens, Colby Ayers, Ian J Neeland, Mark J Haykowsky, Michael D Nelson, Satyam Sarma, Jarett D Berry
Low cardiorespiratory fitness (CRF) and obesity are significant risk factors for heart failure (HF). However, given the inverse association between CRF and obesity, the independent contributions of low CRF and adiposity toward HF risk are not well established. We evaluated the association of CRF and measures of adiposity with left ventricular (LV) peak systolic strain-a subclinical measure of LV dysfunction-among the Dallas Heart Study phase II participants without cardiovascular disease who had CRF estimated using a submaximal treadmill test and LV systolic circumferential strain assessment by tissue-tagged cardiac magnetic resonance imaging...
July 25, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28880082/perovskite-type-incoo3-with-low-spin-co-3-effect-of-in-o-covalency-on-structural-stabilization-in-comparison-with-rare-earth-series
#15
Koji Fujita, Takahiro Kawamoto, Ikuya Yamada, Olivier Hernandez, Hirofumi Akamatsu, Yu Kumagai, Fumiyasu Oba, Pascal Manuel, Ryo Fujikawa, Suguru Yoshida, Masayuki Fukuda, Katsuhisa Tanaka
Perovskite rare-earth cobaltites ACoO3 (A = Sc, Y, La-Lu) have been of enduring interest for decades due to their unusual structural and physical properties associated with the spin-state transitions of low-spin Co(3+) ions. Herein, we have synthesized a non-rare-earth perovskite cobaltite, InCoO3, at 15 GPa and 1400 °C and investigated its crystal structure and magnetic ground state. Under the same high-pressure and high-temperature conditions, we also prepared a perovskite-type ScCoO3 with an improved cation stoichiometry in comparison to that in a previous study, where synthesis at 6 GPa and 1297 °C yielded a perovskite cobaltite with cation mixing on the A-site, (Sc0...
September 7, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28872057/simulation-study-on-exchange-interaction-and-unique-magnetization-near-ferromagnetic-morphotropic-phase-boundary
#16
Songrui Wei, Xiaoqi Liao, Yipeng Gao, Sen Yang, Dong Wang, Xiaoping Song
Extensive efforts have been made in searching enhanced functionalities near the so-called morphotropic phase boundaries (MPBs) in both ferroelectric and ferromagnetic materials. Due to the exchange anti-symmetry of the wave function of fermions, it is widely recognized that the exchange interaction plays a critical role in ferromagnetism. As a quantum effect, the exchange interaction is magnitudes larger than electric interaction, leading to a fundamental difference between ferroelectricity and ferromagnetism...
September 5, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28871348/characterization-of-complex-flow-patterns-in-the-ascending-aorta-in-patients-with-aortic-regurgitation-using-conventional-phase-contrast-velocity-mri
#17
Odd Bech-Hanssen, Frida Svensson, Christian L Polte, Åse A Johnsson, Sinsia A Gao, Kerstin M Lagerstrand
Ascending aorta (AA) flow displacement (FD) is a surrogate for increased wall shear stress. We prospectively studied the flow profile in the AA in patients with aortic regurgitation (AR), to identify predictors of FD and investigate whether magnetic resonance imaging (MRI) phase-contrast flow rate curves (PC-FRC) contain quantitative information related to FD. Forty patients with chronic moderate (n = 14) or severe (n = 26) AR (21 (53%) with bicuspid aortic valve) and 22 controls were investigated. FD was determined from phase-contrast velocity profiles and defined as the distance between the center of the lumen and the "center of velocity" of the peak systolic forward flow or the peak diastolic negative flow, normalized to the lumen radius...
September 4, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28871098/anisotropic-resonance-modes-emerging-in-an-antiferromagnetic-superconducting-state
#18
F Waßer, C H Lee, K Kihou, P Steffens, K Schmalzl, N Qureshi, M Braden
Two strong arguments in favor of magnetically driven unconventional superconductivity arise from the coexistence and closeness of superconducting and magnetically ordered phases on the one hand, and from the emergence of magnetic spin-resonance modes at the superconducting transition on the other hand. Combining these two arguments one may ask about the nature of superconducting spin-resonance modes occurring in an antiferromagnetic state. This problem can be studied in underdoped BaFe2 As2, for which the local coexistence of large moment antiferromagnetism and superconductivity is well established by local probes...
September 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28865495/repetitive-transcranial-magnetic-stimulation-rtms-for-treatment-resistant-major-depression-trmd-veteran-patients-study-protocol-for-a-randomized-controlled-trial
#19
Zhibao Mi, Kousick Biswas, J Kaci Fairchild, Anne Davis-Karim, Ciaran S Phibbs, Steven D Forman, Michael Thase, Gerald Georgette, Tamara Beale, David Pittman, Margaret Windy McNerney, Allyson Rosen, Grant D Huang, Mark George, Art Noda, Jerome A Yesavage
BACKGROUND: Evaluation of repetitive transcranial magnetic stimulation (rTMS) for treatment-resistant major depression (TRMD) in Veterans offers unique clinical trial challenges. Here we describe a randomized, double-blinded, intent-to-treat, two-arm, superiority parallel design, a multicenter study funded by the Cooperative Studies Program (CSP No. 556) of the US Department of Veterans Affairs. METHODS: We recruited medical providers with clinical expertise in treating TRMD at nine Veterans Affairs (VA) medical centers as the trial local investigators...
September 2, 2017: Trials
https://www.readbyqxmd.com/read/28865487/sclerosing-angiomatoid-nodular-transformation-of-the-spleen-mimicking-metastasis-of-melanoma-a-case-report-and-review-of-the-literature
#20
Ilhan Demirci, Horst Kinkel, Dirk Antoine, Marc Szynaka, Bernd Klosterhalfen, Susanne Herold, Hermann Janßen
BACKGROUND: Sclerosing angiomatoid nodular transformation is a benign disorder of splenic tissue and is often mistaken as a potentially malignant entity in the diagnostic process. To the best of our knowledge, this is the first report of sclerosing angiomatoid nodular transformation mimicking metastasis of melanoma in the literature. CASE PRESENTATION: A 43-year-old white man presented with a newly found splenic mass 4 years ago to our Department of Gastroenterology...
September 3, 2017: Journal of Medical Case Reports
keyword
keyword
112495
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"