Search Results
Results 1 - 50 of 853
1 2 3 4 5 6 7 8 9 10 >
Huber-Wagner Stefan S Klinikum rechts der Isar, Technical University Munich - TUM, Department of Trauma Surgery, Ismaninger Str. 22, D-81675 Munich, Germany. Electronic address: - - 2014
Whole-body computed tomography (WBCT) is increasingly becoming the standard diagnostic technique during the resuscitation of severely injured patients. However, little is known about the ideal localisation of the CT scanner within the emergency setting. We intended to analyse the potential effect of the localisation of the CT scanner on outcome. ...
Momose Toshiya T From the *Department of Neurosurgery, Tokyo Medical and Dental University, Tokyo, Japan; †Katsuta Hospital Mito Gamma House, Hitachi-naka, Japan; ‡Research Team for Neuroimaging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan; and §Departments of Neurosurgery, Tokyo Women's Medical University Medical Center East, Tokyo, - - 2014
Stereotactic radiosurgery with gamma knife (GK-SRS) generally improves the focal control of brain metastases. Yet in cases of focal recurrence at a previous radiation site, MRI is often imperfect in differentiating between active tumor and radiation injury. We have examined whether the use of C methionine (MET) with PET will ...
Liu Chien-Liang CL Department of Chemistry, National Taiwan University, Taipei, 10617, - - 2014
The room-temperature, aqueous-phase synthesis of iron-oxide nanoparticles (IO NPs) with glutathione (GSH) is reported. The simple, one-step reduction involves GSH as a capping agent and tetrakis(hydroxymethyl)phosphonium chloride (THPC) as the reducing agent; GSH is an anti-oxidant that is abundant in the human body while THPC is commonly used in the ...
Ye Deju - - 2014
Controlled self-assembly of small molecule gadolinium (Gd) complexes into nanoparticles (GdNPs) is emerging as an effective approach to design activatable magnetic resonance imaging (MRI) probes and amplify the r1 relaxivity. Herein, we employ a reduction-controlled macrocyclization reaction and self-assembly to develop a redox activated Gd-based MRI probe for sensing reducing ...
Zhang Yuning Y Department of Chemistry, New York University, 100 Washington Sq. East, New York, NY 10003 (USA) http://www.nyu.edu/projects/jerschow/ - - 2014
Nuclear magnetic resonance (NMR) spectroscopy and magnetic resonance imaging (MRI) have become important techniques in many research areas. One major limitation is the relatively low sensitivity of these methods, which recently has been addressed by hyperpolarization. However, once hyperpolarization is imparted on a molecule, the magnetization typically decays within relatively ...
Lopci E E Nuclear Medicine, Humanitas Clinical and Research Center, Rozzano, MI, Italy. Electronic address: - - 2014
Carbon-11 methionine ((11)C-Methionine) is a radio-labeled amino acid currently utilized in Positron Emission Tomography (PET) for imaging primary and metastatic brain tumors. Its clinical use relies mostly on oncologic applications, but the tracer has the potential to investigate other non-malignant conditions. So far, very limited evidence concerns the use of ...
Chicklore Sugama S From the *Clinical PET Centre, Division of Imaging Sciences, King's College London; †Department of Endocrine Surgery, King's College Hospital; and ‡Department of Endocrine Surgery, Guy's & St Thomas' Hospital, London, United - - 2014
The aim of this study was to assess the utility of combined C-methionine and F-FDG PET/CT imaging in hyperparathyroidism. We reviewed all scans performed for hyperparathyroidism with both C-methionine and F-FDG PET/CT or PET in our institution since 1993. Forty-three patients (47 pairs of scans) were included (13 men and ...
Takenaka Shunsuke - - 2013
The aim of this study is to assess the different metabolic activities characteristic of glioma recurrence and radiation necrosis (RN) and to explore the diagnostic accuracy for differentiation of the two conditions using (11)C-methionine (MET), (11)C-choline (CHO), and (18)F-fluorodeoxyglucose (FDG)-positron emission tomography (PET). Fifty patients with lesions suggestive of recurrent ...
Susheela Sridhar P - - 2013
The use of magnetic resonance imaging (MRI) is the current standard for the delineation of target volumes for high-grade gliomas (HGG). While the peritumoral edema as per T2-weighted (T2W) imaging is utilized as basis to delineate the initial borders of the clinical target volume (CTV), those areas enhancing on T1-weighted ...
Harris Sebastian M SM Department of Radiological Sciences, St. Jude Children's Research Hospital, Memphis, - - 2013
The purpose of this study was to evaluate the biodistribution of (11)C-labeled methionine in non-tumor-involved organs in pediatric patients studied for malignant diseases. Ninety-three children and young adults with known or suspected malignancies underwent (11)C-methionine PET and CT scans. Imaging began 5-15 min after injection of 740 MBq (20 mCi) ...
Schalin-Jäntti Camilla - - 2013
All patients with primary hyperparathyroidism should undergo localization studies before reoperation, but it is not known which method is most accurate. The purpose of this prospective study was to compare the performance of planar scintigraphy with (123)I/(99m)Tc-sestamibi, (99m)Tc-sestamibi SPECT (SPECT/CT), (11)C-methionine PET/CT, and selective venous sampling (SVS) in persistent primary ...
Dobeli K L KL Medical Image Optimisation and Perception Group (MIOPeG), Medical Imaging & Radiation Sciences Faculty Research Group, Faculty of Health Sciences, University of Sydney, Sydney, Australia. - - 2013
To compare the dose-optimisation potential of a smoothing filtered backprojection (FBP) and a hybrid FBP/iterative algorithm to that of a standard FBP algorithm at three slice thicknesses for hepatic lesion detection with multidetector CT. A liver phantom containing a 9.5-mm opacity with a density of 10 HU below background was ...
Sharma Punit - - 2013
Subdural hygroma is the collection of cerebrospinal fluid in the subdural space. Most often these resolve spontaneously. However, in cases with neurological complications surgical drainage may be needed. We here, present the case of an 8-year-old boy with post meningitis subdural hygroma. (99m)Tc-ehylene cysteine dimer ((99m)Tc-ECD) hybrid single photon emission ...
Kurihara Shigekazu S Institute for Innovation, Ajinomoto Co, Inc, 1-1 Suzuki-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa, 210-8681 - - 2013
The decreases in the glutathione (GSH) level in the mouse spleen and liver after immune stimulation are suppressed by the oral administration of cystine and theanine (CT). GSH is considered to be important for the control of immune responses. Antibody production in mice after infection is enhanced by the oral ...
Zeng Tao - - 2012
ABSTRACT: A 35-year-old man presented with right lower extremity numbness and weakness. CT demonstrated an irregular left parietal hypoattenuation with a punctuate calcification. MRI revealed a T1 low signal and T2 high signal lesion with extensive surrounding edema. Gadolinium-enhanced MRI showed an irregular enhancing lesion. F-FDG and C-methionine PET both ...
Galldiks Norbert - - 2012
AbstractThe purpose of this positron emission tomography (PET) study was to compare the prognostic value of pretreatment volume of [11C]-methionine (MET) uptake and semiquantitative MET uptake ratio in patients with malignant glioma. The study population comprised 40 patients with malignant glioma. Pretreatment magnetic resonance imaging (MRI) and MET-PET imaging were ...
Young Martin - - 2012
A 3 yr old female spayed English setter mixed-breed dog presented with diarrhea, weight loss, side stepping to the right, and a right head tilt. Rectal and cerebrospinal fluid cytology and culture confirmed a diagnosis of Prototheca zopfii. MRI of the brain showed inflammation of the brain and meninges, ventriculomegaly, ...
Bieri Oliver - - 2012
In general, MR image contrast is expected to be resolution independent, but a pronounced loss of contrast is observed between fluids and tissues with contemporary musculoskeletal protocols (typical inplane resolution << 1 mm) using nonbalanced steady-state free precession, such as double echo steady state. For nonbalanced steady-state free precession, diffusion ...
Sano Rui - - 2011
Abstract Conclusion. Contrast enhancement of the inner ear by three-dimensional fluid-attenuated inversion recovery magnetic resonance imaging (3D-FLAIR MRI) taken 4 h after intravenous gadolinium (Gd) injection was better than when taken at 10 min. Using heavily T2-weighted 3D-FLAIR MRI, visualization of endolymphatic hydrops (EH) was possible in the vestibule and ...
Crisi G - - 2011
Proton magnetic resonance spectroscopy ((1)H MRS) has been used extensively for the characterization of the intracranial meningiomas. A major emphasis is placed on identification of an alanine (Ala) content within these tumors. Less attention is given to other metabolites such as glutamine and glutamate (Glx). Our objective was to assess ...
Bydder G M - - 2011
A variety of techniques are now available to directly or indirectly detect signal from tissues, fluids and materials that have short, ultrashort or supershort T₂ or T₂* components. There are also methods of developing image contrast between tissues and fluids in the short T₂ or T₂* range that can provide ...
Calabrese Leonard - - 2011
The first step in the management of progressive multifocal leukoencephalopathy (PML) is awareness of the disease. Patients vulnerable to PML are those with immunosuppression, either through their disease or use of immune-modulating therapy. In patients susceptible to PML who exhibit focal neurologic signs and symptoms, brain magnetic resonance imaging can ...
Wei Xiaohui - - 2011
Computed tomography (CT) imaging is a valuable tool for the diagnosis of colorectal diseases. However, the colonic wall depiction in 2D CT images is usually poor because of the low contrast between the colonic wall and the luminal content. In order to improve the visualization of the colonic wall and ...
D'Anastasi Melvin - - 2011
The purpose of this study is to correlate the presence of intradiscal vacuum phenomenon on CT to that of intradiscal fluid on MRI. In a prospective study, 20 patients with lumbar vacuum phenomenon on CT underwent two MRI examinations. One was performed after mobilization, and the other was performed after ...
Blanc Frédéric - - 2011
To describe a relapse of Whipple disease revealed by isolated limbic encephalitis with no other signs of systemic involvement. Case report. University Hospital of Strasbourg, Strasbourg, France. Patient  A 41-year-old patient. Cognitive functions and results of cerebrospinal fluid analysis and brain magnetic resonance imaging. A 41-year-old patient was hospitalized for ...
Shah Akash D - - 2011
Orbito-cranial foreign bodies present a treacherous situation that can escape detection. The only evidence of these foreign bodies may be the entry wound in the form of a small lid laceration. A two-year-old boy presented with right upper lid laceration following a fall two hours back. Analysis of the fluid ...
Köhrmann Martin - - 2011
BACKGROUND AND PURPOSE: The hyperintense acute reperfusion marker (HARM) on fluid-attenuated inversion recovery MRI is believed to be caused by gadolinium-based contrast agents crossing a disrupted blood-brain barrier. However, this hypothesis has never been directly verified in humans. METHODS: In this study, we analyzed cerebrospinal fluid samples of patients with ...
Sommer Wieland H - - 2011
OBJECTIVES: The aim of this study is to determine MRI characteristics which indicate liver metastases of neuroendocrine tumors (NET) rather than metastases of other origin (non-NET). METHODS: Sixty-nine patients with histopathologically proven liver metastases from NET and 69 patients with known liver metastases of other origin underwent MRI of the ...
Howarth Thomas R - - 2011
Acoustic metamaterials are being considered for periodic structures where specific microscopic material properties can be tailored to alter macroscopic acoustic fields. One type of acoustic metamaterial being considered is an active fluid known as magnetorheological (MR) fluids. MR fluids contain magnetic particles dispersed within a host fluid where its viscoelastic ...
Swain Freddie R - - 2011
Extra-osseous fat fluid level is rarely seen in osteomyelitis, with only three magnetic resonance imaging (MRI) cases previously reported in the literature. The rarity of this finding is probably secondary to the extensive necrosis of bone marrow that needs to occur at a rapid phase for the fat to accumulate. ...
Park Sung Won - - 2011
We describe patients with isolated small-bowel angioedema caused by allergic reactions to intravenous contrast media. Computed tomography (CT) revealed circumferential thickening of the walls of the duodenum or jejunum. Follow-up small-bowel follow-through, small-bowel endoscopy, and CT showed normalized small-bowel loops. Transient findings of circumferential thickening of the small-bowel walls on ...
Mansouri Bobbak - - 2011
We describe a rare case of a patient with left frontotemporal gliosarcoma, which metastasized through the cerebrospinal fluid (CSF) to the leptomeninges and pachymeninges. Pathologically confirmed, magnetic resonance imaging-visible leptomeningeal spread of gliosarcoma via the CSF has not been previously reported.
Lee Ching-Yi - - 2011
Purpose: Ventriculoperitoneal (VP) shunt or ventriculoatrial shunt is a common operation for treatment of hydrocephalus. Usually, shunt series (plain radiographs of the skull, neck, chest and abdomen) and brain computed tomography (CT) are used to monitor the status of hydrocephalus and VP shunt. However, does the result of a brain ...
Keedy Alexander W - - 2011
To prospectively compare adequacy of colonic cleansing, adequacy of solid stool and fluid tagging, and patient acceptance by using reduced-volume, 2-L polyethylene glycol (PEG) versus magnesium citrate bowel preparations for CT colonography. This study was approved by the institutional Committee on Human Research and was compliant with HIPAA; all patients ...
Fang Fei Fei - - 2011
The dispersion stability of soft magnetic carbonyl iron (CI)-based magnetorheological (MR) fluids was improved by applying a unique functional coating composed of a conducting polyaniline layer and a multi-walled carbon nanotube nest to the surfaces of the CI particles via conventional dispersion polymerization, followed by facile solvent casting. The coating ...
Chen Luan Xiong - - 2011
A simple fiber sensor for magnetic field measurement based on nanoparticle Fe<sub>3</sub>O<sub>4</sub> magnetic fluid and relative Fresnel reflection is presented. The sensor includes only a light source, three couplers, two photodetectors, and two fiber sensing ends. Magnetic fields at different concentrations of magnetic fluid are measured. Magnetic fluid with high ...
Aliprandi A - - 2011
PURPOSE: The purpose of our study was to demonstrate the diagnostic value of magnetic resonance imaging (MRI) when measuring and characterising periprosthetic fluid collections in patients with painful hip prosthesis and to provide an estimation of interobserver reproducibility. MATERIALS AND METHODS: Nineteen patients (mean age 59±13 years) with painful total ...
Riegler Johannes - - 2011
Our aim was to compare different magnet arrangements for magnetic cell delivery to human lower leg arteries and investigate the theoretical targeting efficiency under realistic flow conditions as a possible treatment after angioplasty. Additionally the potential of scaling down or translating the magnetic actuation device for preclinical studies was explored. ...
Gu Huidong - - 2011
PURPOSE: This study aimed to develop a 0.014-in., anti-solenoid loop (ASL) magnetic resonance imaging guidewire (MRIG) for intravascular 3.0-T MR imaging. MATERIALS AND METHODS: We first designed the ASL MRIG, which was made of a coaxial cable with its extended inner conductor and outer conductor connected to two micro-anti-solenoids. We ...
Choughri Hussein - - 2011
Abstract We report an atypical presentation of squamous cell carcinoma (SCC) of the distal phalanx of the left thumb. On physical examination, there was no clinical evidence of a local lesion, but magnetic resonance imaging (MRI) showed multiple intraosseous cavities filled with fluid. A biopsy specimen showed a well-differentiated SCC, ...
Battal B - - 2011
Cerebrospinal fluid (CSF) spaces include ventricles and cerebral and spinal subarachnoid spaces. CSF motion is a combined effect of CSF production rate and superimposed cardiac pulsations. Knowledge of CSF dynamics has benefited considerably from the development of phase-contrast (PC) MRI. There are several disorders such as communicating and non-communicating hydrocephalus, ...
Madhuranthakam Ananth J - - 2011
Fluid-attenuated inversion recovery (FLAIR) is a routinely used technique in clinical practice to detect long T(2) lesions by suppressing the cerebrospinal fluid. Concerns remain, however, that the inversion pulse in FLAIR imparts T(1) weighting that can decrease the detectability and mischaracterize some lesions. Hence, FLAIR is usually acquired in conjunction ...
Hatakeyama Wilasinee - - 2011
Gadolinium metal-organic framework (Gd MOF) nanoparticles are an interesting and novel class of nanomaterials that are being studied as a potential replacement for small molecule positive contrast agents in magnetic resonance imaging (MRI). Despite the tremendous interest in these nanoscale imaging constructs, there are limitations, particularly with respect to controlling ...
Struffert Tobias - - 2011
To demonstrate the feasibility of intravenous Flat Detector CT Angiography (FD-CTA) for visualisation of intracranial Flow Diverting Devices. Flow Diverting Devices are used increasingly for treatment of intracranial aneurysms. A close follow up is necessary because it becomes obvious that a significant proportion of aneurysms treated with these devices remain ...
Lim Seong Hoon - - 2011
An acute spontaneous spinal epidural hematoma (SSEH) is a rare spinal pathology. A 57-year-old man who had hypertension and had been on dual antiplatelet therapy with aspirin and clopidogrel for primary prevention presented with the sudden onset of mid back pain and monoplegia of the left lower extremity. Magnetic resonance ...
Baena Alejandro Espejo - - 2011
PURPOSE:: To assess the risk of damage to the popliteal neurovascular structures when inserting the needle through the posterior aspect of the knee during inside-out suture of the posterior horn of the medial meniscus. METHODS:: The first stage of our study consisted of simulating a virtual meniscal suture during magnetic ...
Criminisi Antonio - - 2011
This paper presents an algorithm for the automatic detection of intravenous contrast in CT scans. This is useful e.g. for quality control, given the unreliability of the existing DICOM contrast metadata. The algorithm is based on a hybrid discriminative-generative probabilistic model. A discriminative detector localizes enhancing regions of interest in ...
Balki Mrinalini - - 2010
The objective of this continuing professional development module is to describe the role of ultrasound for spine demarcation before placement of neuraxial blocks and to provide a comprehensive systematic approach towards ultrasound scanning in obstetric patients. Ultrasound imaging of the lumbar spine has been shown to be effective in improving ...
Sakurai K - - 2010
We sought to evaluate radioisotope cisternography (RICG)-related postpuncture CSF leakage by MRI. We conducted a prospective 3-day imaging study. Ten patients with orthostatic headache and other symptoms underwent pre-RICG brain and spinal MRI, magnetic resonance myelography (MRM), RICG, and post-RICG spinal MRI and MRM. For RICG, we used a 25-gauge ...
Alberio Nicola - - 2010
The authors describe the case of a 47-year-old woman with a wide (14 × 12-cm) ulcerated lumbosacral myelomeningocele. The patient had sought medical attention for a sudden copious CSF leak from the lumbosacral sac followed by clinical signs of CSF leakage. After admission, neuroradiological assessment (spinal MR and 3D CT ...
1 2 3 4 5 6 7 8 9 10 >