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Tawfik Ahmed M AM Ahmed M Tawfik, Ahmad El-Morsy, Diagnostic and Interventional Radiology Department, Faculty of Medicine, Mansoura University, Mansoura 35112, - - 2014
Evaluation of rotator cuff is a common indication for magnetic resonance imaging (MRI) scanning of the shoulder. Conventional MRI is the most commonly used technique, while magnetic resonance (MR) arthrography is reserved for certain cases. Rotator cuff disorders are thought to be caused by a combination of internal and external ...
Saber Tehrani Ali S AS From the Department of Neurology (A.S.S.T., J.C.K., J.H.P., D.N.), University of Illinois College of Medicine at Peoria; and Departments of Neurology (G.M., D.F.H., D.S.Z., D.E.N.-T.) and Radiology (A.B., S.Y.), Johns Hopkins University School of Medicine, Baltimore, - - 2014
Describe characteristics of small strokes causing acute vestibular syndrome (AVS).METHODS: Ambispective cross-sectional study of patients with AVS (acute vertigo or dizziness, nystagmus, nausea/vomiting, head-motion intolerance, unsteady gait) with at least one stroke risk factor from 1999 to 2011 at a single stroke referral center. Patients underwent nonquantitative HINTS "plus" examination ...
Mendiola Christina C Department of Pathology, University of Texas Health Science Center, San Antonio, TX, United - - 2014
In 5-10% of cases with CML, variant or complex translocations (CT) are seen that may result in atypical fluorescence in situ hybridization signal patterns. Dual color, dual fusion fluorescence in situ hybridization (D-FISH) patterns are instrumental in identifying the genesis of these CT, but their prognostic implications remain controversial. The ...
Liu Hui H Department of Spine Surgery, The First Affiliated Hospital, Sun Yat-sen University, No. 58, Zhongshan 2nd Road, Guangzhou, 510080, - - 2014
To explore the role of spinopelvic sagittal alignment in the pathological mechanism of degenerative spondlylolisthesis (DS) development. A total of 52 asymptomatic volunteers, 32 single segment L4-5 DS and 29 lumbar spinal stenosis (LSS) without spondylolisthesis patients were enrolled. All subjects had standard lumbar spine X-ray films with standard position ...
Alkalay Ron N RN Center for Advanced Orthopedic Studies, Department of Orthopedics, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, - - 2014
To use T2 and diffusion MR to determine the change in the mechanical function of human disks with increased degenerative state. Spatial changes in T2 and diffusion were quantified in five cadaveric human lumbar disks under compressive loads. Regression models were used to investigate the relationship between the change in ...
Iwase Satoshi - - 2014
Sweating is an important mechanism for ensuring constant thermoregulation, but hyperhidrosis may be disturbing. We present five cases of hemifacial hyperhidrosis as a compensatory response to an/hypohidrosis caused by cervical disc herniation. All the patients complained of hemifacial hyperhidrosis, without anisocoria or blepharoptosis. Sweat function testing and thermography confirmed hyperhidrosis ...
Lenaerts L L a Biomechanics Section, KU Leuven, Celestijnenlaan 300C, 3001 Leuven , - - 2014
No accepted methodology exists to assess trabecular bone orientation from clinical CT scans. The aim of this study was to test the hypothesis that the distribution of grey values in clinical CT images is related to the underlying trabecular architecture and that this distribution can be used to identify the ...
Bregstein Joan S JS Department of Pediatrics, Columbia University College of Physicians and Surgeons, New York, New York, - - 2014
Our objective is to highlight recent literature investigating low-radiation diagnostic strategies in the evaluation of pediatric trauma. In the area of minor head injury, research has focused on implementation of validated clinical decision rules into practice to reduce unnecessary computed tomography scans. Clinical observation may also serve as an adjunct ...
Aiyangar Ameet - - 2014
Most studies investigating human lumbar vertebral trabecular bone (HVTB) mechanical property- density relationships have presented results for the superior-inferior (SI), or "on-axis" direction. Equivalent, directly measured data from mechanical testing in the transverse (TR) direction are sparse and quantitative computed tomography (QCT) density-dependent variations in the anisotropy ratio of HVTB ...
Chen Chiao-Chi V CC N123, Institute of Biomedical Sciences, Academia Sinica, 128, Section 2, Academia Road, Nankang, Taipei, 11529, - - 2014
White matter tracts are important for the trafficking of neural progenitor cells (NPCs) in both normal and pathological conditions, but the underlying mechanism is not clear. The directionality of white matter is advantageous for molecules or cells to distribute over a long distance, but this feature is unlikely solely responsible ...
Hershkovitz Yehuda Y Division of Surgery, Assaf Harofeh Medical Center, Zerifin 70300, affiliated to the Sackler Faculty of Medicine, Tel Aviv University, - - 2014
Computed tomography (CT) has become an important tool for the diagnosis of intra-abdominal and chest injuries in patients with blunt trauma. The role of CT in conscious asymptomatic patients with a suspicious mechanism of injury remains controversial. This controversy intensifies in the management of pediatric blunt trauma patients, who are ...
Lemos João J Departments of Neurology (JL, BS, LC), Neuroradiology (DP), and Otorhinolaryngology (MA, AP), Coimbra University Hospital Center, Coimbra, - - 2014
: We describe a patient with downbeat nystagmus (DBN) evoked only by eye closure. Brain and spinal cord magnetic resonance imaging revealed a T2 paramedian lesion in the left lower basis pontis and other white matter lesions consistent with multiple sclerosis. One potential mechanism for DBN in this case involves ...
Chakram S S Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853, - - 2014
We study the mechanical properties of stoichiometric SiN resonators through a combination of spectroscopic and interferometric imaging techniques. At room temperature, we demonstrate ultrahigh quality factors of 5×107 and a f×Q product of 1×1014  Hz. To our knowledge, these correspond to the largest values yet reported for mesoscopic flexural resonators. Through ...
Wang Hao - - 2014
We numerically demonstrate selective absorption of visible light in film-coupled nanoparticle metamaterials by excitation of magnetic resonance. The physical mechanism of magnetic resonance is elucidated with the help of electromagnetic field distribution. Resonance wavelengths are shown to be strongly dependent on geometric parameters. Representative inductor-capacitor models are employed to further ...
Li Chiye - - 2014
Photoacoustic (PA) endoscopy for human urogenital imaging has the potential to diagnose many important diseases, such as endometrial and prostate cancers. We have specifically developed a 12.7 mm diameter, rigid, side-scanning PA endoscopic probe for such applications. The key features of this endoscope are the streamlined structure for smooth cavity introduction ...
Khan I I Department of Radiology, King's College Hospital, London, - - 2014
Bowel and mesenteric injuries are relatively uncommon but associated with significant morbidity and mortality. Early recognition is crucial, and multidetector computed tomography (MDCT) now has a central role in the evaluation of patients with a history of trauma. In this review, we describe the MDCT appearances of bowel and mesenteric ...
Chen Wengen W University of Maryland School of Medicine, Baltimore, MD, USA, - - 2014
Diagnosis of cardiac mechanical device or prosthesis valve infection, and more importantly accurate localization of the infection site, such as defibrillator pocket, pacemaker lead, annular or peri-annular valve ring abscesses remain clinically challenging. Inconclusive diagnosis can lead to delayed antibiotic therapy, device extraction or surgical intervention, which may have dire ...
Bruns Brandon Robert BR From the University of Maryland Medical Center (B.R.B., R.T., C.S., A.L., T.M.S., D.M.S.), Shock Trauma and Anesthesiology Research-Organized Research Center (J.K.), R Adams Cowley Shock Trauma Center, Baltimore, - - 2014
Blunt cerebrovascular injury (BCVI) is reported to occur in approximately 2% of blunt trauma patients, with a stroke rate of up to 20%. Guidelines for BCVI screening are based on clinical and radiographic findings. We hypothesized that liberal screening of the neck vasculature, as part of initial computed tomographic (CT) ...
Jun Hyo Sub HS Department of Neurosurgery, Hallym University Sacred Heart Hospital, Hallym University School of Medicine, Anyang, - - 2014
Although blood contamination of cerebrospinal fluid (CSF) after an intracranial operation can occur, the development of a symptomatic spinal hematoma after craniotomy has been anecdotally reported and it is uncommon reported after a supratentorial meningioma removal operation. We report a case of spinal subdural hematoma following a supratentorial meningioma removal ...
Nazzal Munier M University of Toledo Medical Center, Toledo, OH. Electronic address: - - 2014
This case report presents the challenges associated with the existing screening modalities in the diagnosis of carotid artery dissection, and also reviews the diagnostic efficiency, limitations, and recent advances in imaging technology. A 54-year-old man with blunt trauma and subsequent development of ischemic stroke and no clear initial evidence of carotid ...
Wetherill Reagan R RR Department of Psychiatry, University of Pennsylvania, Philadelphia, PA 19104, USA. Electronic address: - - 2014
Although several sex differences in nicotine dependence have been identified, the neural mechanisms underlying these sex differences are not clear. The present study examines sex differences in resting-state brain activity using an arterial spin labeling (ASL) perfusion imaging technique. Fifty-one (31 males) sated nicotine-dependent cigarette smokers underwent perfusion functional magnetic ...
Horga Guillermo G Department of Psychiatry, New York State Psychiatric Institute and College of Physicians and Surgeons, Columbia University, New York, NY, - - 2014
The widespread use of Magnetic Resonance Imaging (MRI) in the study of child- and adult-onset developmental psychopathologies has generated many investigations that have measured brain structure and function in vivo throughout development, often generating great excitement over our ability to visualize the living, developing brain using the attractive, even seductive ...
Gorchon J J Laboratoire de Physique des Solides, Université Paris-Sud, CNRS, UMR8502, 91405 Orsay, - - 2014
We show experimental evidence of magnetization switching in a single (Ga,Mn)(As,P) semiconducting ferromagnetic layer, attributed to a strong reduction of the magnetization and the anisotropy due to current injection. The nucleation of magnetization reversal is found to occur even in the absence of a magnetic field and to be both ...
Dubow Jordan S JS Department of Neurology and Neurosciences, Weill Cornell Medical College, New York, New - - 2014
Intracranial atherosclerotic disease (ICAD) is one of the most common causes of ischemic stroke worldwide. Although the pathogenesis of cerebral infarct in ICAD has been reported from autopsy series, the mechanism of stroke is not well known. This study used baseline perfusion imaging and diffusion-weighted imaging (DWI) or computerized tomography ...
Erdem Hakan - - 2014
We evaluated patients admitted to the intensive care units with the diagnosis of community acquired pneumonia (CAP) regarding initial radiographic findings. A multicenter retrospective study was held. Chest x ray (CXR) and computerized tomography (CT) findings and also their associations with the need of ventilator support were evaluated. A total ...
Matsuo Ryu R Department of Medicine and Clinical Science, Fukuoka, - - 2014
The mechanism of cerebral decompression sickness (DCS) is still unclear. We report 2 cases of breath-hold divers with cerebral DCS in whom magnetic resonance imaging (MRI) demonstrated distinctive characteristics. One case presented right hemiparesthesia, diplopia, and gait disturbance after breath-hold diving into the sea at a depth of 20 m. ...
Takahashi Mitsuhiko M Department of Orthopaedics, the Institute of Health Biosciences, the University of - - 2014
Background The accessory navicular bone is one of the most common accessory ossicles, which sometimes become symptomatic. Abnormalities in magnetic resonance (MR) image, e. g. edema-like bone marrow pattern, have been reported for symptomatic accessory navicular. However, it has not been completely understood the edema-like bone marrow pattern correlates to ...
Tomino Takahiro T Department of Surgery and Science, Pathological Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, - - 2014
We herein present the case of a 77-year-old man who had fever and right hypochondriac pain. He visited his doctor and underwent contrast computed tomography (CT), and he was suspected to have a liver abscess. He received an antibiotic treatment and his symptoms soon disappeared, but the tumor did not ...
Finlay Clare J CJ Wolfson Centre for Age-related Diseases, King's College London , London , - - 2014
Dopamine replacement therapy in the form of levodopa results in a significant proportion of patients with Parkinson's disease developing debilitating dyskinesia. This significantly complicates further treatment and negatively impacts patient quality of life. A greater understanding of the neurobiological mechanisms underlying levodopa-induced dyskinesia (LID) is therefore crucial to develop new ...
Iwase Satoshi - - 2014
Sweating is an important mechanism for ensuring constant thermoregulation, but hyperhidrosis may be disturbing. We present five cases of hemifacial hyperhidrosis as a compensatory response to an/hypohidrosis caused by cervical disc herniation. All the patients complained of hemifacial hyperhidrosis, without anisocoria or blepharoptosis. Sweat function testing and thermography confirmed hyperhidrosis ...
Dubois Jessica J INSERM, U992, Cognitive Neuroimaging Unit, Gif-sur-Yvette, France;CEA, NeuroSpin Center, Gif-sur-Yvette, France;University Paris Sud, Orsay, France. Electronic address: - - 2013
Studying how the healthy human brain develops is important to understand early pathological mechanisms and to assess the influence of fetal or perinatal events on later life. Brain development relies on complex and intermingled mechanisms especially during gestation and first post-natal months, with intense interactions between genetic, epigenetic and environmental ...
Neumann Dawn D Department of Physical Medicine and Rehabilitation, Rehabilitation Hospital of Indiana, Indiana University School of Medicine, 4141 Shore Drive, Indianapolis, IN, 46254, USA, - - 2013
The ability to recognize others' emotions is critical to successful interpersonal interactions. Given its importance, there has been an extensive amount of research using functional magnetic resonance imaging (fMRI) to investigate the neurobiological mechanisms associated with facial affect recognition in healthy individuals, and some in patient populations with affective disorders. ...
Anwar Shafkat S Department of Pediatrics, Division of Cardiology, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, United States of - - 2013
We report the case of a 2.5-year-old patient with single-ventricle physiology who underwent cardiac magnetic resonance study for cyanosis after Kawashima operation. Magnetic resonance imaging study showed a veno-venous collateral redirecting systemic venous flow, responsible for cyanosis.
Mucha Armin - - 2013
Single photon emission computerized tomography and conventional computerized tomography (SPECT/CT) tracer uptake has been shown to reflect the loading history of the tibiofemoral knee joint and correlate with the mechanical and anatomical alignment. It was our primary purpose to develop a novel standardized SPECT/CT algorithm for patients undergoing high tibial ...
Xiao Guanjun - - 2013
There is an urgent need for the development in the field of the magnetism of topological insulators, owing to the necessity for the realization of the quantum anomalous Hall effect. Herein, we discuss experimentally fabricated nanostructured hierarchical architectures of the topological insulator Bi2 Te3 without the introduction of any exotic ...
Maquer Ghislain - - 2013
Degeneration of the intervertebral disc, sometimes associated with low back pain and abnormal spinal motions, represents a major health issue with high costs. A non-invasive degeneration assessment via qualitative or quantitative MRI (magnetic resonance imaging) is possible, yet, no relation between mechanical properties and T2 maps of the intervertebral disc ...
Poehlmann Melanie M Department of Physical Chemistry II, University of Bayreuth, Universitätsstraße 30, DE-95440 Bayreuth, Germany. - - 2013
Polymer-shelled magnetic microbubbles have great potential as hybrid contrast agents for ultrasound and magnetic resonance imaging. In this work, we studied US/MRI contrast agents based on air-filled poly(vinyl alcohol)-shelled microbubbles combined with superparamagnetic iron oxide nanoparticles (SPIONs). The SPIONs are integrated either physically or chemically into the polymeric shell of ...
Chavarria Laia - - 2013
Brain alterations such as hepatic encephalopathy or brain edema are usually associated with liver failure. The mechanisms that lead to the generation of edema seem to be different depending on the course of liver failure (acute, chronic or acute-on-chronic liver failure). Several neuroimaging methods allow a non-invasive assessment of brain ...
Cortés Campos A - - 2013
Atelectasis is an important indicator of potentially severe underlying disease that must be diagnosed as early as possible. One of the most common mechanisms is the reabsorption of air distal to respiratory tract obstruction. The chest X-ray is an excellent tool to diagnose atelectasis, and it is especially useful for ...
El Amine Nour N Centre de Cancérologie Charles Bruneau, Centre Hospitalier Universitaire Sainte-Justine Centre de Recherche, Montréal, Québec H3T 1C5, - - 2013
During cytokinesis, closure of the actomyosin contractile ring (CR) is coupled to the formation of a midbody ring (MR), through poorly understood mechanisms. Using time-lapse microscopy of Drosophila melanogaster S2 cells, we show that the transition from the CR to the MR proceeds via a previously uncharacterized maturation process that ...
Tanaka Terumitsu - - 2013
Magnetization mechanisms of nanoscale magnetic grains greatly differ from well-known magnetization mechanisms of micrometer- or millimeter-sized magnetic grains or particles. Magnetization switching mechanisms of nanoscale exchange-coupled composite (ECC) grain in a microwave field was studied using micromagnetic simulation. Magnetization switching involving a strongly damped or precessional oscillation was studied using ...
Schön Stephan N - - 2013
The current study investigates whether patella height and tilt or leg alignment influence the intensity values as well as the distribution pattern of single photon emission computerized tomography/computerized tomography (SPECT/CT) tracer uptake in the patellofemoral joint. 99mTc-HDP-SPECT/CT and radiographs of consecutive 84 knees were prospectively obtained. Lateral radiographs were analyzed ...
Castellanos-Gomez Andres - - 2013
Mechanical resonators are fabricated from freely suspended single-layer MoS2 . Their dynamics  have been studied by optical interferometry. These resonators behave as membranes with resonance frequencies in between 10 and 30 MHz and quality factors in between 16 and 109. We also demonstrate clear signatures of nonlinear resonance in these ...
Lee Hyowon - - 2013
The mechanical robustness of microfabricated torsional magnetic actuators in withstanding the strong static fields (7 T) and time-varying field gradients (17 T/m) produced by an MR system was studied in this investigation. The static and dynamic mechanical characteristics of 30 devices were quantitatively measured before and after exposure to both ...
Golba Krzysztof - - 2013
The mechanisms underlying functional mitral regurgitation (MR) and the relation between mechanism and severity of MR have not been evaluated in a large, multicenter, randomized controlled trial. Transesophageal echocardiography (TEE) was performed in 215 patients at 17 centers in the Surgical Treatment for Ischemic Heart Failure (STICH) trial. Both 2-dimensional ...
Yu Ping - - 2013
We present a novel broken-nanoring, which can realize strongly localized confinement and highly enhancement for both electric and magnetic fields at two resonant modes excited by normal incident azimuthally polarized light. Two resonant modes of the broken-nanoring are formed by different resonant mechanisms as different resonant lengths. The physical model ...
Chang Eric Y - - 2013
We report the occurrence of a short radiolunate ligament rupture in a rock climber. To our knowledge, an isolated traumatic rupture of this ligament has not been described in the literature, and awareness of this entity allows initiation of therapy. The magnetic resonance imaging and ultrasound appearances are reviewed and ...
Borotikar Bhushan S - - 2013
To establish an in vivo, normative patellofemoral cartilage contact mechanics database acquired during voluntary muscle control using a novel dynamic magnetic resonance (MR) imaging-based computational methodology and validate the contact mechanics sensitivity to the known sub-millimeter methodological inaccuracies. Dynamic cine phase-contrast and multi-plane cine images were acquired while female subjects ...
Ataollahi Asghar - - 2013
This paper presents a novel MR-compatible 3-DOF cardiac catheter steering mechanism. The catheter's steerable structure is tendon driven and consists of miniature deflectable, helical segments created by a precise rapid prototyping technique. The created catheter prototype has an outer diameter of 9 Fr (3 mm) and a steerable distal end ...
Ellingson Arin M - - 2013
Study Design. Experimental correlation study design to quantify features of disc health, including signal intensity and distinction between the annulus fibrosus (AF) and nucleus pulposus (NP), with T2* magnetic resonance imaging (MRI) and correlate with the functional mechanics in corresponding motion segments.Objective. Establish the relationship between disc health assessed by ...
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