Search Results
Results 1 - 50 of 1919
1 2 3 4 5 6 7 8 9 10 >
Yousem David M DM The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins Medical Institution, 600 North Wolfe Street Phipps B100F, Baltimore, MD 21287, USA. Electronic address: - - 2014
It is difficult to justify maintaining a clinical functional magnetic resonance imaging (fMRI) program based solely on revenue generation. The use of fMRI is, therefore, based mostly in patient care considerations, leading to better outcomes. The high costs of the top-of-the-line equipment, hardware, and software needed for state-of-the-art fMRI and ...
Chen Feng F 1. Department of Medical Imaging, Jinling Hospital, Nanjing Clinical School of Southern Medical University, Nanjing 210002 , - - 2014
[Abstract] Background The concentricity of BCS has captured wide attention, the findings of the current study may provide useful information on the centrifugal pathogenesis of BCS. Objective This study aims to evaluate the performance of MRI, DWI and MRS in elucidating the pathogenesis of Balo's lesions expanding. Methods Six clinically ...
Etesami M M Cardiothoracic Imaging Section, Radiology, University Hospital of Cleveland, Case Western Reserve School of Medicine, Cleveland, OH, - - 2014
Vascular rings are congenital abnormalities of the aortic arch-derived vascular and ligamentous structures, which encircle the trachea and oesophagus to varying degrees, resulting in respiratory or feeding difficulties in children. A sling is an abnormality of the pulmonary arterial system resulting in airway compression. Although several imaging examinations are available ...
Leonardi Benedetta B Department of Cardiology and Cardiac Surgery, Bambino Gesù Children's Hospital, IRCCS Rome, - - 2014
Our aim is to compare new non-invasive imaging modalities in the evaluation of vascular ring (VR) and pulmonary artery sling (PAS) and to understand the role of bronchoscopy in comparison with them in assessing tracheobronchial tree. We have retrospectively analyzed the data from 41 patients with a VR or a ...
Xu X-X XX Huaxi MR Research Center (HMRRC), Department of Radiology, West China Hospital of Sichuan University, Chengdu, China; Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, - - 2014
To explore the role of diffusion-weighted imaging (DWI) in the discrimination of brain abscess from other ring-enhancing brain lesions through meta-analysis. The PUMBED, OVID, and China National Knowledge Infrastructure (CNKI) databases, from January 1995 to March 2013, were searched for studies evaluating the diagnostic performance of DWI in the discrimination ...
Finelli Pasquale F PF Department of Neurology, Hartford Hospital and University of Connecticut School of Medicine; Hartford, CT, USA - - - 2014
This study describes a series of cases and reviews the literature on cases of ring lesion on diffusion-weighted imaging to better appreciate the spectrum of disease associated with this neuroimaging finding. We retrospectively reviewed the MR studies of 15 patients with ring pattern lesions on diffusion-weighted imaging from an inpatient ...
Crijns Sjoerd S Department of Radiotherapy, University Medical Center Utrecht, Heidelberglaan 100, 3584-CX Utrecht, the - - 2014
Recently, the MRI-linac prototype at UMC Utrecht was upgraded with a ring-based gantry, where all linac components are mounted on a ring around the MR scanner. Although adaptations have been made to both linac and MR magnets in order to account for mutual magnetic interference, interference problems cannot be ruled ...
Prasad Deepa D 1Rainbow Babies and Children's Hospital,Case Western School of Medicine,Cleveland,United States of - - 2014
We describe a rare case of double vascular ring diagnosed with cardiac magnetic resonance imaging in a patient with ventricular septal defect, pulmonary stenosis, and right aortic arch.
Al-Naib Ibraheem I INRS-EMT, 1650 Boulevard Lionel-Boulet, Varennes, Québec J3X 1S2, - - 2014
We report on a novel metamaterial structure that sustains extremely sharp resonances in the terahertz domain. This system involves two conductively coupled split ring resonators that together exhibit a novel resonance, in broad analogy to the antiphase mode of the so-called Huygens coupled pendulum. Even though this resonance is in ...
Noury Adrien A Institut d'Electronique Fondamentale, CNRS-UMR 8622, Univ. Paris-Sud, F-91405 Orsay, - - 2014
We report on coupling between semiconducting single-wall carbon nanotubes (s-SWNT) photoluminescence and silicon microring resonators. Polyfluorene extracted s-SWNT deposited on such resonators exhibit sharp emission peaks, due to interaction with the cavity modes of the microring resonators. Ring resonators with radius of 5 μm and 10 μm were used, reaching ...
Yang Tai-Hua TH Biomechanics & Tendon and Soft Tissue Biology Laboratory, Division of Orthopedic Research, Mayo Clinic, Rochester, MN, 55905, - - 2014
Non-inflammatory subsynovial connective tissue (SSCT) fibrosis with nerve compression is a prominent feature of carpal tunnel syndrome (CTS). Studies have shown that SSCT matrix synthesis and material property changes in CTS are associated with increased activity of transforming growth factor β (TGF-β1). This study's aims were to 1) investigate the ...
McAndrew Christopher M CM Washington University in Saint Louis, Department of Orthopaedic - - 2014
The null hypothesis of the current study states that routine axial CT images are obtained at a consistent and reproducible orientation relative to the sacrum. The secondary null hypothesis states that there is no difference in the measurement of the safe zone for placement of iliosacral screws when using routine ...
Nabavizadeh S A SA From the Department of Radiology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania; and Department of Radiology, University of Pennsylvania, Philadelphia, - - 2014
Schizencephaly is a rare malformation of the brain characterized by a gray matter-lined defect extending from the pial surface to the lateral ventricles. The purpose of this study was to correlate imaging findings of schizencephaly and associated anomalies on fetal and postnatal MR imaging and assess possible changes that may ...
Boulouis Grégoire G From the Hemorrhagic Stroke Research Program, Department of Neurology (G.B., A.D., H.B.B., P.F., A. Vashkevich, A.A., K.S., A. Viswanathan, M.E.G., S.M.G.), Division of Neuroradiology, Department of Radiology (J.M.R.), Department of Emergency Medicine (J.N.G.), and Division of Neurocritical Care and Emergency Neurology (J.R.), Massachusetts General Hospital, Harvard Medical School, Boston, MA; Department of Biostatistics, Harvard School of Public Health, Boston, MA (R.A.B.); and Department of Clinical Neurosciences and Hotchkiss Brain Institute, University of Calgary, Alberta, Canada - - 2014
We sought to identify baseline determinants of the anatomic pattern of hematoma expansion in patients with intracerebral hemorrhage and spot sign. We coregistered baseline and follow-up CT scans from 15 intracerebral hemorrhage patients and measured growth at each surface node from baseline to follow-up hematoma. We analyzed the effects of ...
Kadi R - - 2014
We report a case of stroke due to cocaine abuse in a 30-year-old woman. The initial examinations pointing to this diagnosis were CT and MRI. Magnetic Resonance Imaging revealed bilateral globus pallidus infarction characterized by restricted Diffusion with low ADC values. There was also a partial hemorrhagic component confirmed on ...
Imaoka Hiroshi H Department of Gastroenterology, Aichi Cancer Center Hospital, Nagoya, Japan. Electronic address: - - 2014
Adenosquamous carcinoma of the pancreas (ASC) is a rare malignant neoplasm of the pancreas, exhibiting both glandular and squamous differentiation. However, little is known about its imaging features. This study examined the imaging features of pancreatic ASC. We evaluated images of contrast-enhanced computed tomography (CT) and endoscopic ultrasonography (EUS). As ...
Hong Cheolpyo C Center for Medical Metrology, Korea Research Institute of Standards and Science, Daejeon, Republic of Korea. Electronic address: - - 2014
Open-configuration magnetic resonance imaging (MRI) systems are becoming increasingly desirable for musculoskeletal imaging and image-guided radiotherapy because of their non-claustrophobic configuration. However, geometric image distortion in large fields-of-view (FOV) due to field inhomogeneity and gradient nonlinearity hinders the practical applications of open-type MRI. We demonstrated the use of geometric distortion ...
Newman Beverley B Department of Radiology, Stanford University, Lucile Packard Children's Hospital, 725 Welch Road, MC 5913, Stanford, CA, 94305, USA, - - 2014
We encountered multiple cases in which the US appearance of ruptured appendicitis mimicked intussusception, resulting in diagnostic and therapeutic delay and multiple additional imaging studies. To explore the clinical and imaging discriminatory features between the conditions. Initial US images in six children (age 16 months to 8 years; 4 boys, 2 girls) ...
Cha D I DI Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of - - 2014
To investigate the dark choledochal ring sign on T2-weighted imaging (T2WI) as an indicator for pancreatic ductal adenocarcinoma (PDAC) among periampullary carcinomas. Sixty patients with surgically confirmed periampullary cancers [30 PDACs, 15 distal common bile duct (CBD) cancers, 13 ampullary cancers, and two duodenal cancers] who underwent liver magnetic resonance ...
Deren Matthew E ME Department of Orthopedic Surgery, Warren Alpert Medical School of Brown University , Providence, RI, - - 2014
Posterior sternoclavicular dislocations are rare but serious injuries. The proximity of the medial clavicle to the vital structures of the mediastinum warrants caution with management of the injury. Radiographs are the initial imaging test, though computed tomography and magnetic resonance imaging are essential for diagnosis and preoperative planning. This paper ...
van Heerden Jolandi J Department of Radiology, The Royal Melbourne Hospital, The University of Melbourne, Melbourne, Victoria, - - 2014
This pictorial essay highlights the role of the radiologist as a member of the adult epilepsy multidisciplinary team, and gives an overview of MRI-evident epileptogenic lesions.
Ackman Jeanne B JB *Harvard Medical School †Department of Radiology, Division of Thoracic Imaging and Intervention, Massachusetts General Hospital, Boston, - - 2014
There is increasing perception that thoracic magnetic resonance imaging (MRI) is underutilized. Various obstacles to implementation and utilization of thoracic MRI can be overcome with continuous updating, improvement, and standardization of thoracic MRI protocols, close collaboration with MRI technologists, continued education of MRI technologists, radiologists, and referring health care providers, ...
Antonica Filippo F D.I.M.- Diagnostic Imaging - Nuclear Medicine, University of Bari "Aldo Moro", Bari, Italy. - - 2014
In the last decade numerous attempts were considered to co-register and integrate different imaging data. Like PET/CT the integration of PET to MR showed great interest. PET/MR scanners are recently tested on different distrectual or systemic pathologies. Unfortunately PET/MR scanners are expensive and diagnostic protocols are still under studies and ...
Oinam Arun S AS Post Graduate Institute of Medical Education and Research. - - 2014
The purpose of this study is to find the uncertainties in the reconstruction of MR compatible ring-tandem intracavitary applicators of high-dose rate image-based brachytherapy treatment planning using rigid registration of 3D MR and CT image fusion. Tandem and ring reconstruction in MR image based brachytherapy planning was done using rigid ...
Yi Dong - - 2014
The most serious erratic migration of paragonimiasis is a cerebral paragonimiasis. Infection in the temporal and occipital lobes of the brain has been previously reported in cerebral paragonimiasis. Here, we report a case of chronic brainstem paragonimiasis. A 29-year-old Chinese woman presented to our hospital complaining of a sudden onset, ...
Dhandapani Sivashanmugam S Department of Neurosurgery, Post Graduate Institute of Medical Education and Research, Chandigarh, - - 2014
Operative localization systems such as stereotactic frames and neuronavigation are prohibitively expensive to be of use in many centers in developing countries. Here, we present a modified version of marker-computed tomography (CT) assisted technique using a household key ring, which can be performed in any operative set-up lacking modern amenities. ...
Chin Alexander L AL University of Pennsylvania Philadelphia PA 19104. - - 2014
Head and neck cancers centered at the base of skull are better visualized on MRI than on CT. The purpose of this investigation was to investigate the accuracy of bulk density assignment in head and neck intensity-modulated radiation therapy (IMRT) treatment plan optimization. Our study investigates dose calculation differences between ...
Eckert Paulo Roberto PR Post-Graduate Program in Electrical Engineering, Federal University of Rio Grande do Sul, Av. Osvaldo Aranha 103, CEP: 90035-190, Porto Alegre, RS, Brazil. - - 2014
This work analyses the effects of segmentation followed by parallel magnetization of ring-shaped NdFeB permanent magnets used in slotless cylindrical linear actuators. The main purpose of the work is to evaluate the effects of that segmentation on the performance of the actuator and to present a general overview of the ...
Isnaini Ismet I Imaging Science and Engineering Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan, - - 2013
The current positron emission tomography (PET) design is aimed toward establishing an entire-body PET scanner. An entire-body PET scanner is a scanner whose axial field of view (FOV) covers the whole body of a patient, whereas whole-body PET scanner can be of any axial FOV length, but was designed for ...
Renne Julius J Diagnostic and Interventional Radiology, Hannover Medical School, Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center for Lung Research, Hannover, - - 2013
To evaluate the reproducibility of oxygen-enhanced magnetic resonance imaging (MRI), and the influence of different gas delivery methods, in a clinical environment. Twelve healthy volunteers were examined on two visits with an inversion recovery snapshot fast low angle shot sequence on a 1.5 T system. Coronal slices were obtained breathing ...
Kashiwagi Manabu - - 2013
Histopathological studies have reported that optical coherence tomography (OCT) can accurately detect fibroatheroma that is involved in not only culprit lesion of acute coronary syndrome but also no-reflow phenomenon after percutaneous coronary intervention. Studies have demonstrated superiority of OCT in plaque characterization and interruption of arterial wall component. At current, ...
Tang Jianwei - - 2013
We derive an analytical LC model from Maxwell's equations for the magnetic resonance of subwavelength ring resonators. Using the LC model, we revisit the scaling of split-ring resonators. Inspired by the LC model, we propose a hybrid metal-dielectric ring resonator mainly composed of high index dielectric material (e.g., TiO<sub>2</sub>) with ...
Dey Rajat - - 2013
A CMOS compatible wavelength monitor comprised of two thermally tuned racetrack-ring resonators with defect mediated photodiode structures is experimentally demonstrated in monolithic silicon. Each resonator is independently tuned so as to determine an unknown input wavelength by tuning the resonance peak locations until there is overlap between the two comb ...
Gabbe B J - - 2013
We describe the routine imaging practices of Level 1 trauma centres for patients with severe pelvic ring fractures, and the interobserver reliability of the classification systems of these fractures using plain radiographs and three-dimensional (3D) CT reconstructions. Clinical and imaging data for 187 adult patients (139 men and 48 women, ...
Jha Ashish Kumar AK Department of Nuclear Medicine and Molecular Imaging, Tata Memorial Hospital, Parel, Mumbai, Maharashtra, - - 2013
Artifacts present in computed tomography (CT) image often degrade the image quality and ultimately, the diagnostic outcome. Ring artifact in trans-axial image is caused by either miscalibrated or defective detector element of detector row, which is often categorized as scanner based artifact. A ring artifact detected on trans-axial CT image ...
Baillie Jonathan - - 2013
A new MRI and CT scanning unit at Winchester's Royal Hampshire County Hospital, run by the Hampshire Hospitals NHS Foundation Trust, has been officially opened by the city's MP, Steven Brine, having been completed in February by Brymor Contractors, under advice from TKL Architects, to replace a former imaging facility ...
Tobing Landobasa Y M - - 2013
Metamaterials provide a good platform for biochemical sensing due to its strong field localization at nanoscale. In this work, we show that electric and magnetic resonant modes in split-ring-resonator (SRR) can be efficiently excited under unpolarized light illumination when the SRRs are arranged in fourfold rotationally symmetric lattice configuration. The ...
Alzimami K S KS Department of Radiological Sciences, King Saud University, Riyadh, Saudi Arabia. - - 2013
Positron emission tomography (PET) using zirconium-89 ((89)Zr) is complicated by its complex decay scheme. In this study, we quantified the effective dose from (89)Zr and compared it with fluorine-18 fludeoxyglucose ((18)F-FDG). Effective dose distribution in a PET/CT facility in Riyadh was calculated by Monte Carlo simulations using MCNPX. The positron ...
Papadopoulou Athina - - 2013
Progenitor cells from the subventricular zone (SVZ) of the lateral ventricles are assumed to contribute to remyelination and resolution of black holes (BHs) in multiple sclerosis (MS). This process may depend on the distance between the lesion and the SVZ. The objective of this paper is to investigate the relationship ...
Wang Kaiyang - - 2013
We theoretically study a single-ring-resonator-based add/drop interferometer to achieve tunable Fano resonance. The Fano resonance results from the interference of two resonant beams propagating in the ring resonator. The line shapes of the Fano resonance are tunable by controlling the coupling coefficients between the waveguide and ring resonator. The spectra ...
Hein Sven M - - 2013
We numerically explore the emission behavior of magnetic dipole emitters located next to resonant plasmonic split-ring resonators (SRRs), which are well known for their large magnetic moment at their fundamental resonance in the near infrared. Our results are compared to the situation for electric dipole emitters, where the SRR can ...
Ewerlin M - - 2013
We investigated magnetic phase transitions, magnetic anisotropy, and magnetic domains in Pd1-xFex alloys with different Fe concentrations x = 2.2-7.2%. The Curie temperature depends linearly on the Fe concentration in the regime studied. The magnetization is dominantly in-plane with a small out-of-plane remanent contribution. Resonant magnetic small angle scattering with circularly polarized ...
Jolepalem Prashant - - 2013
This is a case of a 32-year-old female patient who presented with new onset partial complex seizures. MRI of the brain demonstrated a suspicious ring-enhancing lesion in the right temporal lobe. This finding was felt to be a primary brain malignancy or less likely an infectious process. F-FDG PET of ...
Paparo Francesco - - 2013
We report a case of a primary signet ring cell carcinoma (PSRCC) of the small bowel in a patient with long-standing Crohn's disease, describing computed tomography (CT)-enterography (CTE) and 18F-fluorodeoxyglucose (18F-FDG) positron emission tomography (PET)/CT features of this rare tumor. CTE demonstrated submucosal thickening of a long ileal segment with ...
Wong Yin-Zhi - - 2013
OBJECTIVES:: To observe and improve the interobserver variation of corneal sublayer pachymetry using ConfoScan4 (CS4) z ring. METHODS:: Right corneas of 34 normal subjects were scanned using CS4 (z ring) (Nidek Technologies, Padova, Italy). Corneal sublayer pachymetry was performed by two masked observers based on the written frame selection criteria ...
Maisano Francesco - - 2013
OBJECTIVES: To evaluate the performance and safety of an adjustable semi-rigid annuloplasty ring for mitral regurgitation (MR) in a multicentre study. METHODS: Between March 2010 and December 2011, 30 subjects underwent mitral valve (MV) repair using the Cardinal adjustable annuloplasty ring. This device is a semi-rigid ring allowing postimplantation size ...
Abele Travis A - - 2013
PURPOSE: To evaluate bSSFP (balanced steady state free precession) and half-Fourier RARE (rapid acceleration with relaxation enhancement) MRI sequences in their ability to demonstrate fetal anatomic landmarks, quantify the degree of cerebellar herniation in Chiari II malformations and level and length of the associated open neural tube defects, as well ...
Wang Junqiao - - 2013
Double Fano resonant characteristics are investigated in planar plasmonic structure by embedding a metallic nanorod in symmetric U-shaped split ring resonators, which are caused by a strong interplay between a broad bright mode and narrow dark modes. The bright mode is resulted from the nanorod electric dipole resonance while the ...
Paik Nam Chull - - 2013
Variations of the inferior vena cava (IVC) are clinically silent and most often diagnosed incidentally when imaging for other reasons. However, they may have significant clinical implications during retroperitoneal surgery, venous intervention, or differential imaging diagnosis. This article describes a case of triple IVC, discovered on a lumbar CT and ...
Sankhe Shilpa S Department of Radiology, Seth GS Medical College and KEM Hospital, Thane, - - 2013
Intracerebral tuberculomas usually manifest as ring-enhancing of nodular lesions on magnetic resonance imaging (MRI). These imaging findings are also observed in other lesions like metastases and toxoplasmosis. To study the MRI perfusion characteristics of tuberculomas and its potential role in their definitive diagnosis. Thirty-four tuberculomas were evaluated by conventional and ...
1 2 3 4 5 6 7 8 9 10 >