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Gräfe J L JL Department of Medical Physics and Applied Radiation Sciences, McMaster University, Hamilton, Ontario, Canada - - 2014
Gadolinium (Gd) based contrast agents are routinely used as part of many magnetic resonance imaging (MRI) procedures. The widespread use of these agents and concerns about Gd toxicity, motivated us to develop a monitoring procedure that could non-invasively measure quantitatively potential retention of toxic free Gd in tissues after use ...
Carrera Inés I Division of Diagnostic Imaging, Vetsuisse Faculty, University of Zurich, 8057 Zurich, - - 2014
Objective-To investigate clinical use of proton magnetic resonance spectroscopy ((1)H MRS) and to compare metabolic brain bioprofiles of dogs with and without hepatic encephalopathy. Animals-6 dogs with hepatic encephalopathy and 12 control dogs. Procedures-Conventional MRI and single-voxel (1)H MRS were performed with a 3-T magnet. Images for routine MRI planes ...
Gharagouzloo Codi Amir CA Nanomedicine Science and Technology Center, Northeastern University, Boston, Massachusetts, USA; Department of Bioengineering, Northeastern University, Boston, Massachusetts, - - 2014
Conventional MRI using contrast agents is semiquantitative because it is inherently sensitive to extravoxular susceptibility artifacts, field inhomogeneity, partial voluming, perivascular effects, and motion/flow artifacts. Herein we demonstrate a quantitative contrast-enhanced MRI technique using ultrashort time-to-echo pulse sequences for measuring clinically relevant concentrations of ferumoxytol, a superparamagnetic iron oxide nanoparticle ...
Dreiser Jan J Institute of Condensed Matter Physics, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne (Switzerland); Swiss Light Source, Paul Scherrer Institut, 5232 Villigen PSI (Switzerland). - - 2014
The low-temperature magnetic properties of the endohedral metallofullerene HoSc2 N@C80 have been studied by superconducting quantum interference device (SQUID) magnetometry. Alternating current (ac) susceptibility measurements reveal that this molecule exhibits slow relaxation of magnetization in a small applied field with timescales in the order of milliseconds. The equilibrium magnetic properties ...
Ochi Tomoko T Department of Radiology, Nara Medical - - 2014
Purpose: As stereotactic radiotherapy (SRT) becomes widespread, precise information including number, location, and margin of lesions is required when magnetic resonance (MR) imaging of brain metastasis is performed. We compare methods using 2 separate injections and a single injection for the administration of a double dose of contrast medium for ...
Wang Yu - - 2014
CXCR4/SDF-1 has been found to be related to the initiation of neuroinflammation in ischemic brain. Herein, we aimed to monitor the changes of neuorinflammation after AMD3100 treatment using TSPO specific PET tracer in a mouse model of stroke. The transient MCAO model was established with Balb/C mice. Success of the ...
Gendler Andrew A WestVet Emergency and Specialty Center, Garden City, ID - - 2014
Comprehensive evaluation of canine elbow joint dysfunction includes assessment of articular cartilage, which can noninvasively be performed with contrast arthrography. Aims of this prospective study were to compare positive contrast computed tomographic (CT) arthrography and histomorphometry measures of cartilage thickness in normal canine elbows, and to determine the optimal contrast ...
Wang Z Z Institute for Medical Science and Technology, University of Dundee, Dundee, - - 2014
Feasibility studies are needed to demonstrate that safe and effective manipulation of bowel during Minimal Access Surgery (MAS) can be obtained by use of magnetic force. This paper characterises two classes of magnetic particles: stainless steel microparticles (SS-μPs) and iron oxide nanoparticles (IO-nPs) in terms of their magnetisation, chemical composition, ...
Shen Lihua L Department of Biomaterials, College of Materials, Xiamen University, Xiamen, 361005, P.R. - - 2014
Self-assembly of viral coating proteins encapsulating functional nanoparticles provides a new class of biomaterials with robust chemical and physical properties for potential applications in functional imaging, and therapeutic or diagnostic agent delivery. Herein, a straightforward method is demonstrated for efficient encapsidation of magnetic nanoparticles into the engineered virus-like particle (VLP) ...
Tinaz Sule S Human Motor Control Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, - - 2014
Tourette syndrome (TS) is a neuropsychiatric disorder characterized by motor and vocal tics. Most patients describe uncomfortable premonitory sensations preceding the tics and a subjective experience of increased sensitivity to tactile stimuli. These reports indicate that a sensory processing disturbance is an important component of TS together with motor phenomena. ...
Venn R E RE School of Veterinary Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, Bearsden Road, Glasgow G61 1QH, - - 2014
Noise produced by magnetic resonance imaging (MRI) scanners (which can peak at a sound pressure level of 131 dB) has been shown to cause noise-induced cochlear dysfunction in people. The aim of this study was to investigate whether noise produced during MRI had a deleterious effect on cochlear function in dogs, ...
Tateno Amane A Department of Neuropsychiatry, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo, - - 2014
We compared amyloid positron emission tomography (PET) and magnetic resonance imaging (MRI) in subjects clinically diagnosed with Alzheimer's disease (AD), mild cognitive impairment (MCI), and older healthy controls (OHC) in order to test how these imaging biomarkers represent cognitive decline in AD. Fifteen OHC, 19 patients with MCI, and 19 ...
Kester Maartje I MI Alzheimer Center, Department of Neurology, VU University Medical Center, Amsterdam, the - - 2014
IMPORTANCE It remains unclear if and how associations between cerebral small-vessel disease and Alzheimer disease (AD) pathology lead to cognitive decline and dementia. OBJECTIVE To determine associations between small-vessel disease and AD pathology. DESIGN, SETTING, AND PARTICIPANTS Cross-sectional study from January 2002 to December 2012 using the memory clinic-based Amsterdam ...
Poole Victoria N VN a Weldon School of Biomedical Engineering , Purdue University , West Lafayette , - - 2014
With growing evidence of long-term neurological damage in individuals enduring repetitive head trauma, it is critical to detect lower-level damage accumulation for the early diagnosis of injury in at-risk populations. Proton magnetic resonance spectroscopic scans of the dorsolateral prefrontal cortex and primary motor cortex were collected from high school American ...
Zheng Wei W Department of Applied Science, College of William &Mary, Williamsburg, VA 23187, - - 2014
The interaction between surface plasmons (SP) and magnetic behavior has generated great research interest due to its potential for future magneto-optical devices with ultra-high sensitivity and ultra-fast switching. Here we combine two surface sensitive effects: magnetic second-harmonic generation (MSHG) and SP to enhance the detection sensitivity of the surface magnetization ...
Cho In K IK 1. Genetics and Molecular Biology Program, Emory University, Atlanta, GA, USA; ; 2. Department of Human Genetics, Emory University School of Medicine, Atlanta, GA, USA; ; 3. Division of Neuropharmacology and Neurologic Diseases, Yerkes National Primate Research Center, Atlanta, GA, - - 2014
The ability to longitudinally monitor cell grafts and assess their condition is critical for the clinical translation of stem cell therapy in regenerative medicine. Developing an inducible genetic magnetic resonance imaging (MRI) reporter will enable non-invasive and longitudinal monitoring of stem cell grafts in vivo. MagA, a bacterial gene involved ...
Zilkens Christoph C Medical Faculty, Department of Orthopedic Surgery, University of Düsseldorf, Düsseldorf, Germany. - - 2013
Current measures of the reduced head-neck offset such as residual deformity of slipped capital femoral epiphysis (SCFE) including the alpha angle, which measures the femoral head-neck sphericity but does not account for acetabular abnormalities, do not represent the true magnitude of the deformity and the mechanical consequences. The beta angle ...
Wang Bo-Yao BY Department of Physics, National Taiwan University, Taipei 10617, - - 2013
Interfacial moments of an antiferromagnet are known for their prominent effects of induced coercivity enhancement and exchange bias in ferromagnetic-antiferromagnetic exchange-coupled systems. Here we report that the unpinned moments of an antiferromagnetic face-centered-cubic Mn layer can drive the magnetization of an adjacent Fe film perpendicular owing to a formation of ...
Poustchi Hossein - - 2013
AIM: We sought to evaluate the performance of transient elastography (TE) for the assessment of liver fibrosis in chronic hepatitis C (CHC) patients with beta-thalassemia. METHODS: Seventy-six CHC patients with beta-thalassemia underwent TE, liver biopsy, T2 -weighted magnetic resonance imaging (MRI) for the assessment of liver iron content (LIC) and ...
O'Neill Michael L - - 2012
Beta-ketothiolase (BKT) deficiency is a rare autosomal recessive metabolic disorder, which causes episodic severe metabolic acidosis. Average onset of disease is from 6 to 24 months. Imaging findings relating to this entity have rarely been reported. We report a case of a 5-year-old girl with BKT deficiency with isolated focal ...
Makino Satoshi - - 2012
Abnormal distributions of transition metals inside the body are potential diagnostic markers for several diseases, including Alzheimer's disease, Parkinson's disease, Wilson's disease, and cancer. In this article, we demonstrate that P57/Gd, a novel prion-based contrast agent, can selectively image tissues with excessive copper accumulation using magnetic resonance imaging (MRI). P57/Gd ...
Mehta Samata - - 2012
BACKGROUND: For any new vaginal dosage form, the distribution and retention in the vagina has to be assessed by in vivo evaluation. We evaluated the vaginal distribution and retention of starch-based pellets in sheep as live animal model by gamma scintigraphy (using Indium-111 DTPA as radiolabel) and in women via ...
Dell'Aquila Angelo Maria - - 2012
Despite a more physiological morphology of atrial anastomosis in the bicaval technique with respect to standard biatrial anastomosis in orthotopic heart transplantation (OHT), the impact on the long-term outcome is still not clear. In this retrospective study, we sought to investigate the morphology and function of the atria through magnetic ...
Imam Yahia Z - - 2012
Invasive group beta-streptococcal arthritis is being increasingly diagnosed as suggested by recent data. We report a case of a middle-aged lady from Sri Lanka who developed septic arthritis of the right shoulder and the left sacroiliac joint as well as an iliopsoas collection caused by Streptococcus agalactiae shortly after labor ...
Lin In-Tsang - - 2012
High temperature superconducting (HTS) surface resonators have been used as a low loss RF receiver resonator for improving magnetic resonance imaging image quality. However, the application of HTS surface resonators is significantly limited by their filling factor. To maximize the filling factor, it is desirable to have the RF resonator ...
Senthil Raja - - 2011
Adrenocortical carcinoma is a rare and aggressive tumour. Inferior vena caval (IVC) involvement by the tumour thrombus is a rare phenomenon, and extension into the right atrium is even more rare. We describe a patient with Cushing's syndrome for whom (18)F-fluorodeoxyglucose (FDG) PET/CT showed FDG avid right adrenal mass with ...
Vázquez María - - 2011
INTRODUCTION AND OBJECTIVES: To study electrical cardioversion in patients with atrial fibrillation as a potential cause of acute ischemic brain lesions. METHODS: We performed prospective analysis of 62 consecutive patients (62 [10] years, 16 female). All of them were anticoagulated for at least 3 weeks with an international normalized ratio ...
Cameli Matteo - - 2011
The occurrence of atrial fibrillation (AF), especially in patients with mitral regurgitation (MR), is related to the degree of left atrial (LA) myopathy, remodeling and fibrosis, that are responsible of LA electrical inhomogeneity and abnormal conduction velocities. Speckle tracking echocardiography (STE) has recently enabled the quantification of longitudinal myocardial LA ...
Wang Nian N Department of Physics and Center for Biomedical Research, Oakland University, Rochester, MI 48309, - - 2012
To study the orientational dependencies of T(2) and T(1ρ) in native and trypsin-degraded bovine nasal cartilage, with and without the presence of 1 mM Gd-DTPA(2-). Sixteen specimens were prepared in two orthogonal fibril directions (parallel and perpendicular), treated using different protocols (native, Gd treated, trypsin-treated, and combination), and imaged using ...
Larson Kindra A KA Pelvic Floor Research Group, University of Michigan, Ann Arbor, MI, USA. - - 2012
This study assesses relative contributions of "midline defects" (widening of the vagina) and "paravaginal defects" (separation of the lateral vagina from the pelvic sidewall). Ten women with anterior predominant prolapse and ten with normal support underwent pelvic MR imaging. 3-D models of the anterior vaginal wall (AVW) were generated to ...
Suzuki Miki - - 2011
Coagulation necrosis is a peculiar type of ischemic necrosis that is characterized by firm, eosinophilic parenchyma with recognizable cell outlines without massive glial reactions. This is an autopsy report of coagulation necrosis 6 months after thrombolytic tissue plasminogen activator therapy against massive cerebral embolism in an 84-year-old man with atrial ...
Walker Daphne K - - 2011
The vagina can easily be overlooked at ultrasonography (US), computed tomography (CT), or magnetic resonance (MR) imaging performed for nongynecologic indications. Even when gynecologic disease is suspected, the vagina may be underevaluated at routine pelvic US due to probe positioning and at CT due to poor vaginal tissue characterization. Although ...
Papaioannou Georgia - - 2011
Magnetic resonance imaging is considered the gold-standard imaging technique in cases of Müllerian and vaginal anomalies, however, vaginal delineation often proves difficult, owing to the fact that vaginal walls are normally collapsed and in close proximity. Instilling gel through the introitus allows for better depiction of the distal vagina.
Gertz Zachary M - - 2011
OBJECTIVES: The purpose of this study was to determine whether atrial fibrillation (AF) might cause significant mitral regurgitation (MR), and to see whether this MR improves with restoration of sinus rhythm. BACKGROUND: MR can be classified by leaflet pathology (organic/primary and functional/secondary) and by leaflet motion (normal, excessive, restrictive). The ...
Li-Jun Jin - - 2011
The objective of this study was to evaluate the electrophysiologic characteristics of Crista terminalis (CT) and their implication in the pathogenesis of atrial tachycardia in rabbits. For this purpose, 27 New Zealand rabbits were used. Using standard glass microelectrode technique, cellular action potentials (APs) of CT and pectinate muscle (PM) ...
Casella Michela - - 2011
AimsChest computed tomography (CT) scanning is increasingly used as an imaging technique in patients undergoing atrial fibrillation (AF) catheter ablation. Chest CT scans visualize organs other than the heart and collateral findings may be identified incidentally. Our study aims to assess the prevalence and clinical relevance of such collateral findings ...
Kosehan Dilek - - 2011
The aim of this study was to investigate the frequency with which interatrial shunts are found during routine coronary computed tomography (CT) angiography and to describe imaging characterizations of patent foramen ovale (PFO), atrial septal defect (ASD), and atrial septal aneurysm (ASA). A total of 1081 adult patients were evaluated ...
Martins Raphaël Pedro - - 2011
Background:  Radiofrequency ablation has became a validated therapeutic technique for symptomatic drug refractory atrial fibrillation (AF). Cardiac computed tomography (CT) is used to evaluate left atrial (LA) anatomy in order to improve AF ablation. The analysis of noncardiac structures during cardiac CT may identify clinically significant incidental findings (IFs). The ...
Na Jin Oh - - 2011
A prominent crista terminalis is a normal anatomic variant which consist of thick muscular bridge within the right atrium. However, it could be often misdiagnosed with an abnormal mass on the transthoracic echocardiography. The case report presented here, describe the findings of transthoracic echocardiography that suggested a right atrial mass ...
Fiaschetti Valeria - - 2011
OBJECTIVES: To prospectively investigate diagnostic value and tolerability of MRI after intra-vaginal gel opacification for diagnosis and preoperative assessment of deeply infiltrating endometriosis. METHODS: Sixty-three women with clinical suspicion of deeply infiltrating endometriosis were previously examined with trans-vaginal ultrasonography and then with MRI pre and post administration of vaginal gel. ...
Pannu Harpreet K - - 2011
RATIONALE AND OBJECTIVES: The aims of this study were to determine agreement between clinical examination and magnetic resonance imaging (MRI) (rectal contrast and noncontrast MRI) for pelvic organ prolapse using both the pubococcygeal line (PCL) and the midpubic line (MPL) and to assess the relationship between measurements performed relative to ...
Hur Jin - - 2011
BACKGROUND AND PURPOSE: A noninvasive method with high reliability and accuracy comparable to transesophageal echocardiography for identification of left atrial appendage thrombus would be of significant clinical value. The aim of this study was to assess the diagnostic performance of a dual-enhanced cardiac CT protocol for detection of left atrial ...
Nucifora Gaetano - - 2011
BACKGROUND: -Precise knowledge of left atrial appendage (LAA) orifice size is crucial for correct sizing of LAA closure devices. Aim of the present study was to determine the performance of real-time three-dimensional transesophageal echocardiography (RT3DTEE) for LAA orifice size assessment, compared to two-dimensional transesophageal echocardiography (2DTEE), and to investigate the ...
McGann Christopher - - 2011
The aim of this study was to assess acute ablation injuries seen on late gadolinium enhancement (LGE) magnetic resonance imaging (MRI) immediately post-ablation (IPA) and the association with permanent scar 3 months post-ablation (3moPA). Success rates for atrial fibrillation catheter ablation vary significantly, in part because of limited information about ...
Uppal T - - 2011
Summary The purpose of this study was to estimate the frequency of post-caesarean section scar defects (PCSD) on transvaginal ultrasound and to correlate these with the presence of abnormal menstrual bleeding. We reviewed the pelvic ultrasound images of 318 women referred for a gynaecological scan in a private women's ultrasound ...
To Andrew C Y - - 2011
BACKGROUND: Computed tomography (CT) is the gold standard for assessing pulmonary vein (PV) anatomy and stenosis after ablation for atrial fibrillation (AF), but radiation exposure can be a concern. Transesophageal echocardiography (TEE) provides anatomic and functional assessment of the PVs, although no study has prospectively compared findings on TEE with those ...
Hegland Donald - - 2011
Background: Atrial Fibrillation, Ablation, Stroke and Silent MRI Lesions.
Lee Hye-Jeong - - 2011
Recently contrast-enhanced cardiac computed tomography (CT) was found to be useful for imaging the left atrium and pulmonary veins (PVs) before radiofrequency catheter ablation in patients with atrial fibrillation. However, the risks of contrast agent in patients with impaired renal function must be considered. We investigated the accuracy of low-dose ...
Aoyagi Shigeaki - - 2011
A 73-year-old woman was referred for treatment of left atrial (LA) myxoma. At surgery, a myxoma was attached to the left atrial side of the fossa ovalis in the atrial septum by a stalk and was transmurally excised with a margin of the atrial septum. The atrial septum was closed ...
D'Silva Andrew - - 2011
Over the last fifteen years, our understanding of the pathophysiology of atrial fibrillation (AF) has paved the way for ablation to be utilized as an effective treatment option. With the aim of gaining more detailed anatomical representation, advances have been made using various imaging modalities, both before and during the ...
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