Search Results
Results 1 - 50 of 1526
1 2 3 4 5 6 7 8 9 10 >
Webb A G AG C.J. Gorter Center for High Field MRI, Department of Radiology, Leiden University Medical Center, Leiden, the - - 2014
The conventional set-up for MR-monitored focused ultrasound surgery includes a piezoelectric transducer and an acoustic-coupling water bath integrated into the MR patient table; a large surface RF coil is placed close to the patient or, alternatively, the body coil is used as the MR receiver. Potential disadvantages of this approach ...
Sala G G Department of Physics, Royal Holloway, University of London, Egham TW20 0EX, - - 2014
The idea of magnetic monopoles in spin ice has enjoyed much success at intermediate temperatures, but at low temperatures a description in terms of monopole dynamics alone is insufficient. Recently, numerical simulations were used to argue that magnetic impurities account for this discrepancy by introducing a magnetic equivalent of residual ...
Duong Binh B NanoScience Technology Center, University of Central Florida, FL, 32826, - - 2014
We present a new approach to develop highly ordered magnetite (Fe3 O4 ) nanoparticle-patterned nanohole arrays with desirable magnetic properties for a variety of technological applications. In this work, the sub-100 nm nanohole arrays have been successfully fabricated from a pre-ceramic polymer mold using spin-on nanoprinting (SNAP). These nanoholes were ...
Abdukayum Abdukader - - 2014
The development of multimodal nanoprobes that combined properties of near-infrared (NIR) fluorescence and magnetic resonance imaging (MRI) within a single probe is very important for medical diagnosis. The NIR-emitting persistent luminescent nanoparticles (PLNPs) are ideal for optical imaging owing to no need for in situ excitation, the absence of background ...
Sakamaki M M Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, - - 2014
The effect of the lattice strain on magnetic anisotropy of alternately layered FeNi ultrathin films grown on a substrate, Cu(tCu = 0-70 ML)/Ni48Cu52(124 ML)/Cu(0 0 1) single crystal, is systematically studied by means of in situ x-ray magnetic circular dichroism (XMCD) and reflection high-energy electron diffraction (RHEED) analyses. To investigate the magnetic anisotropy of the FeNi ...
Siddiqui Imran A IA Institute of Orthopedic and Musculoskeletal Science , University College London, the Royal National Orthopedic Hospital, Brockley Hill , - - 2014
Background and purpose - Metal artifact reduction sequence (MARS) MRI and ultrasound scanning (USS) can both be used to detect pseudotumors, abductor muscle atrophy, and tendinous pathology in patients with painful metal-on-metal (MOM) hip arthroplasty. We wanted to determine the diagnostic test characteristics of USS using MARS MRI as a ...
Lee Youn Joo YJ School of Electrical and Electronic Engineering, Yonsei University, Seoul, Republic of - - 2014
This study presents a completely automated method for separating the left and right lungs using free-formed surface fitting on volumetric computed tomography (CT). The left and right lungs are roughly divided using iterative 3-dimensional morphological operator and a Hessian matrix analysis. A point set traversing between the initial left and ...
Sarella Anandakumar A CIC nanoGUNE Consolider, Tolosa Hiribidea 76, E-20018, Donostia - San Sebastian, - - 2014
P. Vavassori and co-workers demonstrate on page 2384 that field-controlled displacement of magnetic domain walls in ferromagnetic nano-ring structures allows for capture and 2-dimensional remote manipulation of fluidborne magnetic nanoparticles over a chip surface.
Tollard E E Department of Neuroradiology, Rouen University Hospital, 1, rue de Germont, 76031 Rouen cedex, France. Electronic address: - - 2014
The aim of this study was to review the different imaging techniques for analysing giant intracranial aneurysms (digital subtraction angiography [DSA], magnetic resonance imaging [MRI], computed tomography [CT]) imaging and explain their respective contribution to the understanding of the characteristics of these complex aneurysms. Giant aneurysms have a complex pathology ...
Singh Dhirender D Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE 68198-5800, - - 2014
Magnetic nanoparticles (MNPs) are a new and promising addition to the spectrum of biomedicines. Their promise revolves around the broad versatility and biocompatibility of the MNPs and their unique physicochemical properties. Guided by applied external magnetic fields, MNPs represent a cutting-edge tool designed to improve diagnosis and therapy of a ...
Kordowicz A A Department of Vascular Surgery, Royal Bolton Hospital, UK - - - 2014
Duplex scanning is the gold standard for investigating venous reflux; increasingly surgeons perform these scans themselves. There has been no data published analysing the accuracy of Duplex scans performed by vascular surgeons. We aimed to evaluate an objective method of comparing the results of lower limb Duplex scans performed by ...
Amendola Vincenzo V Department of Chemical Sciences, University of Padova, Padova, - - 2014
Diagnostic approaches based on multimodal imaging are needed for accurate selection of the therapeutic regimens in several diseases, although the dose of administered contrast drugs must be reduced to minimize side effects. Therefore, large efforts are deployed in the development of multimodal contrast agents (MCAs) that permit the complementary visualization ...
Ebrahimi Mehran M Faculty of Science, University of Ontario Institute of Technology, 2000 Simcoe St N, Oshawa, ON, Canada, L1H - - 2014
Breast MRI is frequently performed prior to breast conserving surgery in order to assess the location and extent of the lesion. Ideally, the surgeon should also be able to use the image information during surgery to guide the excision and this requires that the MR image is co-registered to conform ...
Radović Magdalena M "Vinča" Institute of Nuclear Sciences, University of Belgrade, P O Box 522, 11000, Belgrade, - - 2014
Two different types of magnetic nanoparticles (MNPs) were synthetized in order to compare their efficiency as radioactive vectors, Fe3 O4 -Naked (80±5nm) and polyethylene glycol 600 diacid functionalized Fe3 O4 (Fe3 O4 -PEG600) MNPs (46±0.6nm). They were characterized based on the external morphology, size distribution, colloidal and magnetic properties. The ...
Zeccolini Guglielmo G Department of Urology, San Bassiano Hospital, Bassano del Grappa (Vicenza) - - - 2014
Introduction: Percutaneous ablation in the kidney is now performed as a standard therapeutic nephron-sparing option in patients who are poor candidates for resection. Its increasing use has been largely prompted by the rising incidental detection of renal cell carcinomas with cross-sectional imaging and the need to preserve renal function in ...
Lyall Amanda E AE Department of - - 2014
Cortical thickness (CT) and surface area (SA) are altered in many neuropsychiatric disorders and are correlated with cognitive functioning. Little is known about how these components of cortical gray matter develop in the first years of life. We studied the longitudinal development of regional CT and SA expansion in healthy ...
Fortuin Ansje S AS Department of Radiology, Radboud University Nijmegen Medical Centre, P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands, - - 2014
Nodal staging in prostate cancer is suboptimal both with respect to current imaging modalities and pelvic lymph node dissection, and thus other techniques are being explored. Lymphotropic nanoparticle-enhanced MRI, also called magnetic resonance lymphography (MRL), is a technique that has shown high sensitivity (65-92 %) and excellent specificity (93-98 %) in detecting ...
Feng Peng - - 2014
X-ray fluorescence computed tomography (XFCT) and K-edge computed tomography (CT) are two important modalities to quantify a distribution of gold nanoparticles (GNPs) in a small animal for preclinical studies. It is valuable to determine which modality is more efficient for a given application. In this paper, we report a theoretical ...
Camera Luigi L Luigi Camera, Angela De Gennaro, Margaret Longobardi, Emanuela Calabrese, Marco Salvatore, Department of Radiology, University "Federico II", 80131 Naples, - - 2014
Transomental hernias are among the rarest type of all internal hernias which overall account for less than 6% of small bowel obstructions. Most transomental hernias occurring in adults are either iatrogenic or post-traumatic. More rarely, a spontaneous herniation of small bowel loops may result from senile atrophy of the omentum. ...
Wang Tao T The Key Laboratory for Magnetism and Magnetic materials of Ministry of Education, Lanzhou University, Lanzhou 730000, China. yangdzh@lzu.edu.cn - - 2014
We report a pronounced angular dependence of the magnetoresistance (MR) effect in a silicon based p-n junction device at room temperature by manipulating the space charge region of the p-n junction under a magnetic field. For the p-n junction device with various space charge region configurations, we find that all ...
Filograna Laura L Institute of Forensic Medicine, Forensic Imaging and Virtopsy, University of Zurich, Winterthurerstrasse 190/52, 8057 Zurich, Switzerland. Electronic address: - - 2014
Hemopericardium (HP) is frequently found at autopsy, but it represents a challenge for the forensic pathologist when having to assess its etiopathological relationship in causing death, particularly in those cases where ante-mortem clinical and instrumental data are not available. The diagnosis of pericardial tamponade (PT), in fact, is based on ...
Chandra Shekhar S SS Australian e-Health Research Centre, CSIRO, Australia. Electronic address: - - 2014
Deformable models incorporating shape priors have proved to be a successful approach in segmenting anatomical regions and specific structures in medical images. This paper introduces weighted shape priors for deformable models in the context of 3D magnetic resonance (MR) image segmentation of the bony elements of the human hip joint. ...
Norel Lucie L CNRS-Université de Rennes 1 and ‡INSA Université Européenne de Bretagne, Institut des Sciences Chimiques de Rennes, UMR 6226 , 263 Av. du Général Leclerc, F-35042 Rennes Cedex, - - 2014
A ruthenium carbon-rich-based ligand that brings redox reversibility to a dysprosium-based single-molecule magnet is reported. Long-distance perturbation of the 4f ion is achieved upon oxidation, resulting in an overall enhancement of the magnetic slow relaxation.
Zhang Yan Y Institut für Technische und Makromolekulare Chemie, RWTH Aachen University, Worringerweg 1, D-52056 Aachen, - - 2014
Within the past decade, 2D Laplace nuclear magnetic resonance (NMR) has been developed to analyze pore geometry and diffusion of fluids in porous media on the micrometer scale. Many objects like rocks and concrete are heterogeneous on the macroscopic scale, and an integral analysis of microscopic properties provides volume-averaged information. ...
Mayer Florian F Department of Biotechnology, Delft University of Technology, Julianalaan 136, 2628 BL Delft (The Netherlands), Fax: - - 2014
The immense structural diversity of more than 200 known zeolites is the basis for the wide variety of applications of these fascinating materials ranging from catalysis and molecular filtration to agricultural uses. Despite this versatility, the potential of zeolites in medical imaging has not yet been much exploited. In this ...
Bruckman Michael - - 2014
The underlying cause of major cardiovascular events, such as myocardial infarctions and strokes, is atherosclerosis. For accurate diagnosis of this inflammatory disease, molecular imaging is required. Toward this goal, we sought to develop a nanoparticle-based, high aspect ratio, molecularly-targeted magnetic resonance MR imaging contrast agent. Specifically, we engineered the plant ...
Son Youn-Suk - - 2014
We removed particulate matter (PM) emitted from a subway tunnel using magnetic filters. A magnetic filter system was installed on the top of a ventilation opening. Magnetic field density was increased by increasing the number of permanent magnet layers to determine PM removal characteristics. Moreover, fan's frequency was adjusted from ...
Ke Hengte H College of Engineering and Peking University Third Hospital, Peking University, Beijing, 100871, China; State Key Laboratory of Urban Water Resources and Environment, School of Life Science and Technology, Harbin Institute of Technology, Harbin, 150080, - - 2014
The integration of multimodal contrast-enhanced diagnostic imaging and therapeutic capabilities could utilize imaging guided therapy to plan the treatment strategy based on the diagnostic results and to guide/monitor the therapeutic procedures. Herein, gold nanoshelled perfluorooctylbromide (PFOB) nanocapsules with PEGylation (PGsP NCs) are constructed by oil-in-water emulsion method to form polymeric ...
Elabyad Ibrahim A - - 2014
Potassium-39 ( (39)K) magnetic resonance imaging (MRI) is a noninvasive technique which could potentially allow for detecting intracellular physiological variations in common human pathologies such as stroke and cancer. However, the low signal-to-noise ratio (SNR) achieved in (39)K-MR images hampered data acquisition with sufficiently high spatial and temporal resolution in ...
Kim Young-Sun YS 1 Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, - - 2014
OBJECTIVE. MRI-guided high-intensity focused ultrasound (HIFU) ablation is increasingly adopted for treating symptomatic uterine fibroids. As a noninvasive therapy performed on an outpatient basis, it has been viewed by patients to have distinct advantages over other treatment options. However, its breadth of clinical application is still limited. To address this ...
Kaiplavil Sreekumar S University of Toronto, Center for Advanced Diffusion-Wave Technologies, Department of Mechanical and Industrial Engineering, 5 King's College Road, Toronto, Ontario, M5S 3G8 - - 2014
ABSTRACT. The challenge of depth-resolved, nonionizing (hybrid-optical) detection of mineral loss in bones is addressed using truncated-correlation photothermal coherence tomography (TC-PCT). This approach has importance not only in ground-based clinical procedures, but also in microgravity space applications. Analogous to x-ray morphometric parameters, two- and three-dimensional markers have been defined and ...
Park Jin Yong JY Busan Center, Korea Basic Science Institute, Busan 609-735, South - - 2014
A superconducting magnet for use in an electron cyclotron resonance ion source was developed at the Korea Basic Science Institute. The superconducting magnet is comprised of three solenoids and a hexapole magnet. According to the design value, the solenoid magnets can generate a mirror field, resulting in axial magnetic fields ...
Schmidt M M DREEBIT GmbH, 01109 Dresden, - - 2014
The magnetic system of a Dresden electron beam ion source (EBIS) generating the necessary magnetic field with a new type of permanent magnet made of high energy density NdFeB-type material operable at temperatures above 100 °C has been investigated and tested. The employment of such kind of magnets provides simplified operation ...
Kim David H DH Department of Radiology, University of Wisconsin Medical School, E3/311 Clinical Science Center 600 Highland Ave., Madison, WI, 53792-3252, USA, - - 2014
To assess the frequency of oral contrast coating of flat polyps, which may promote detection, and influencing factors within a screening CT colonography (CTC) population. This was a retrospective, observational study performed at one institution. From 7,426 individuals, 123 patients with 160 flat polyps were extracted. Flat polyps were defined ...
Tajima Hiroyuki H Center for Minimally Invasive Treatment, Nippon Medical School Musashikosugi Hospital, 1-396 Kosugi-cho, Nakahara-ku, Kawasaki, Kanagawa, 211-8533, Japan, - - 2014
Intra-abdominal hemorrhage caused by omental artery rupture is a rare condition traditionally diagnosed via exploratory laparotomy in hemodynamically unstable patients. We experienced a case in which contrast-enhanced multidetector computed tomography (MDCT) and digital subtraction angiography did not identify the rupture site, whereas CT during left omental arteriography depicted a small ...
Watanabe Meguru M Department of Radiology, University of - - 2014
We report here a rare case of focal multiple venous malformations (VMs) in the white matter, via a draining vein arising from each VM, connecting with an ipsilateral cerebral surface venous varix. The male teen was asymptomatic neurologically. A diagnostic process using of MRI/MRDSA in this extremely rare entity is ...
Berkels Benjamin B Aachen Institute for Advanced Study in Computational Engineering Science (AICES), RWTH Aachen University, Schinkelstr. 2, 52062,  Aachen, Germany, - - 2014
   Brain shift, the change in configuration of the brain after opening the dura mater, is a significant problem for neuronavigation. Brain structures at intra-operative deformed positions must be matched with corresponding structures in the pre-operative 3D planning data. A method to co-register the cortical surface from intra-operative microscope images with ...
Singh Rajendra Kumar - - 2014
Here we communicate the development of a novel multifunctional hybrid nanomaterial, magnetic carbon nanotubes (CNTs) ensheathed with mesoporous silica, for the simultaneous applications of drug delivery and imaging. Magnetic nanoparticles (MNPs) were first decorated onto the multi-walled CNTs, which was then layered with mesoporous silica (mSiO2) to facilitate the loading ...
Otto Jens J Department for General, Visceral and Transplant Surgery at the University Hospital, RWTH Aachen University, Aachen, - - 2014
Background: Application of a mesh in presence of pneumoperitoneum may cause deformation or wave formation when gas is released. Moreover, mesh shrinkage during subsequent wound healing cannot be detected in vivo without invasive diagnostics. Using MRI-visible polyvinylidene fluoride (PVDF) mesh, the extend of mesh deformation and shrinkage could be objectified ...
Tartaglione Tommaso T Dipartimento di Scienze Radiologiche, Istituto di Radiologia, Policlinico Agostino Gemelli, UCSC, Rome, Italy, - - 2014
This study was done to evaluate the role of high-resolution magnetic resonance (MR) imaging with special surface coils in selecting the correct therapeutic approach (eye enucleation or follow-up) in patients with suspected extrascleral extension of uveal melanoma. This prospective study involved 12 patients with suspected extrascleral extension of uveal melanoma ...
He Xiuxia - - 2014
Here, we report the covalently conjugation of lectin on Fe2O3@Au core@shell nanoparticle (lectin-Fe2O3@Au NP) for T2-weighted magnetic resonance (MR) and X-ray computed tomography (CT) dual-modality imaging. The lectin-Fe2O3@Au NPs are prepared by coupling lectins to the Fe2O3@Au NP surfaces through bifunctional PEG NHS ester disulfide (NHS-PEG-S-S-PEG-NHS) linkers. After blocked the ...
Brown D N DN Magnequench Technology Centre, 01-19 The Galen, 61 Science Park Road, 117525, - - 2014
Melt-spun NdFeB powders can be formed into a number of different types of permanent magnet for a variety of applications in electronics, automotive and clean technology industries. The melt-spinning process produces flake powder with a fine uniform array of nanoscale Nd2Fe14B grains. These powders can be net-shape formed into isotropic ...
Kuz'min M D MD Institut für Materialwissenschaft, Technische Universität Darmstadt, D-64287 Darmstadt, - - 2014
Achieving a very strong magnetic anisotropy in a 3d material is a difficult, but not an impossible task. It is difficult because there is no general recipe (necessary condition) for a strong anisotropy in a band magnet. Several strategies can be pursued in this situation. One of them is to ...
Klang Eyal E Department of Diagnostic Imaging, Sheba Medical Center, Tel Aviv University, Tel Hashomer, 52621, Tel Aviv, - - 2014
To assess the contribution of contrast material in detecting and evaluating enthesitis of pelvic entheses by MRI. Sixty-seven hip or pelvic 1.5-T MRIs (30:37 male:female, mean age: 53 years) were retrospectively evaluated for the presence of hamstring and gluteus medius (GM) enthesitis by two readers (a resident and an experienced radiologist). ...
Hung S-C SC Department of Radiology, Taipei Veterans General Hospital, Taipei, Taiwan; and Department of Biomedical Imaging and Radiological Sciences and School of Medicine, National Yang-Ming University, Taipei, - - 2014
BACKGROUND AND PURPOSE:Flat detector CT has been increasingly used as a follow-up examination after endovascular intervention. Metal artifact reduction has been successfully demonstrated in coil mass cases, but only in a small series. We attempted to objectively and subjectively evaluate the feasibility of metal artifact reduction with various metallic objects ...
Liu Fei F Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871 - - 2014
Controlling exchange coupling between hard magnetic and soft magnetic phases is the key to the fabrication of advanced magnets with tunable magnetism and high energy density. Using FePt as an example, control over the magnetism in exchange-coupled nanocomposites of hard magnetic face-centered tetragonal (fct) FePt and soft magnetic Co (or ...
Salunkhe A B - - 2014
Recent advances in development of potential magnetic nanoparticles for magnetic fluid hyperthermia are summarized. This review covers relation between various size dependent physical properties and accordingly modification in synthesis methods. We provide different heating mechanism of magnetic nanoparticles. This review covers recent progress of various magnetic nanoparticles including core shell ...
Coupal Tyler M TM Michael G. DeGroote School of Medicine, McMaster University, 1280 Main St W, Hamilton, ON, Canada, L8S - - 2014
Imaging of patients with large metal implants remains one of the most difficult endeavours for radiologists. This article reviews the theory of dual-energy CT (DECT) and its ability to reduce metal artefact, thus enhancing the diagnostic value of musculoskeletal imaging. The strengths, weaknesses, and alternative applications of DECT, as well ...
Kuznetsov Arseniy I AI Data Storage Institute, A*STAR (Agency for Science, Technology and Research), 5 Engineering Drive 1, 117608 Singapore, - - 2014
Split-ring resonators are basic elements of metamaterials, which can induce a magnetic response in metallic nanosctructures. Tunability of such response up to the visible frequency range is still a challenge. Here we introduce the concept of the split-ball resonator and demonstrate the strong magnetic response in the visible for both ...
Debroye Elke E Department of Chemistry, KULeuven , Celestijnenlaan 200F, 3001 Leuven, - - 2014
A novel synthetic strategy toward a heteropolymetallic lanthanide complex with selectively incorporated gadolinium and europium ions is outlined. Luminescence and relaxometric measurements suggest possible applications in bimodal (magnetic resonance/optical) imaging.
1 2 3 4 5 6 7 8 9 10 >