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Nkhali Lamyaa L Radiation Oncology and Medical Physics, QuantIF-LITIS (EA4108), Henri Becquerel Center and Rouen University Hospital, University of Rouen , - - 2014
Background. A planning study investigated whether reduced target volumes defined on FDG-PET/CT during radiotherapy allow total dose escalation without compromising normal tissue tolerance in patients with esophageal cancer. Material and methods. Ten patients with esophageal squamous cell carcinoma (SCC), candidate to curative-intent concomitant chemo-radiotherapy (CRT), had FDG-PET/CT performed in treatment ...
Yi Zhigao Z College of Physics and Information Science and Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of the Ministry of Education, Hunan Normal University, Changsha 410081, Hunan, China. - - 2014
Polyacrylic acid (PAA) modified NaYF4:Gd/Yb/Er upconversion nanorods (denoted as PAA-UCNRs) are demonstrated for tri-modal upconversion (UC) optical, computed X-ray tomography (CT), and magnetic resonance imaging (MRI). The hydrophilic PAA-UCNRs were obtained from hydrophobic oleic acid (OA) capped UCNRs (denoted as OA-UCNRs) using a ligand exchange method. The as-prepared UCNRs with ...
Caon Martin M School of Health Sciences, Flinders University, GPO Box 2100, Adelaide, SA, 5001, Australia, - - 2014
The construction of a voxel model of seven year-old male anatomy from a low resolution whole body CT scan acquired with a PET-CT scanner is described. The model is referred to as WILLIAM. The model was used to compare the Monte Carlo calculated relative organ doses with and without tube ...
Fuentes D D Department of Imaging Physics, The University of Texas M.D. Anderson Cancer Center, Houston, TX, 77030, USA, - - 2014
Morphometry techniques were applied to quantify the normal tissue therapy response in patients receiving whole-brain radiation for intracranial malignancies. Pre- and Post-irradiation magnetic resonance imaging (MRI) data sets were retrospectively analyzed in N = 15 patients. Volume changes with respect to pre-irradiation were quantitatively measured in the cerebrum and ventricles. Measurements were ...
Price S W T SW Science Division, Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxon, OX11 0DE, UK. - - 2014
The physicochemical state of a catalyst is a key factor in determining both activity and selectivity; however these materials are often not structurally or compositionally homogeneous. Here we report on the 3-dimensional imaging of an industrial catalyst, Mo-promoted colloidal Pt supported on carbon. The distribution of both the active Pt ...
Hansen David C DC Department of Experimental Clinical Oncology, Aarhus University Hospital, 8000 Aarhus, - - 2014
Accurately predicting the range of radiotherapy ions in vivo is important for the precise delivery of dose in particle therapy. Range uncertainty is currently the single largest contribution to the dose margins used in planning and leads to a higher dose to normal tissue. The use of ion CT has ...
Campbell Warren G WG Department of Physics and Astronomy, University of Victoria, Victoria, British Columbia V8P 5C2, - - 2014
The objective of this work is to demonstrate imaging artifacts that can occur during the optical computed tomography (CT) scanning of polymer gel dosimeters due to radiation-induced refractive index (RI) changes in polyacrylamide gels. A 1 L cylindrical polyacrylamide gel dosimeter was irradiated with 3 × 3 cm(2) square beams ...
Vandevoorde C C Department of Basic Medical Sciences, Ghent University, Proeftuinstraat 86, 9000, Gent, Belgium, - - 2014
Investigation of DNA damage induced by CT x-rays in paediatric patients versus patient dose in a multicentre setting. From 51 paediatric patients (median age, 3.8 years) who underwent an abdomen or chest CT examination in one of the five participating radiology departments, blood samples were taken before and shortly after the ...
Cho Jang Hwan - - 2014
Statistical image reconstruction methods for X-ray computed tomography (CT) provide improved spatial resolution and noise properties over conventional filtered back-projection (FBP) reconstruction, along with other potential advantages such as reduced patient dose and artifacts. Conventional regularized image reconstruction leads to spatially variant spatial resolution and noise characteristics because of interactions ...
Taylor Stephen J SJ Research Dietitian, Department of Nutrition and Dietetics, Southmead Hospital, - - 2014
This is a case report of an electromagnetically (EM)-guided Cortrak feeding tube that perforated the lower oesophagus and was not detected by the EM trace or by plain X-ray. Misplacement was diagnosed from computed tomography (CT) following injection of radio-contrast medium down the tube. Recommendations are offered for use of ...
Persson Mats M Department of Physics, Royal Institute of Technology, SE-106 91 Stockholm, - - 2014
Photon-counting detectors are promising candidates for use in the next generation of x-ray computed tomography (CT) scanners. Among the foreseen benefits are higher spatial resolution, better trade-off between noise and dose and energy discriminating capabilities.Silicon is an attractive detector material because of its low cost, mature manufacturing process and high ...
Donati F F Institute of Condensed Matter Physics (ICMP), École Polytechnique Fédérale de Lausanne (EPFL), Station 3, CH-1015 Lausanne, - - 2014
We determine the magnetic properties of individual Co atoms adsorbed on graphene (G) with x-ray absorption spectroscopy and magnetic circular dichroism. The magnetic ground state of Co adatoms strongly depends on the choice of the metal substrate on which graphene is grown. Cobalt atoms on G/Ru(0001) feature exceptionally large orbital ...
Clark Darin P DP Center for In Vivo Microscopy, Box 3302, Duke University Medical Center, Durham, NC 27710, - - 2014
Clinical successes with dual energy CT, aggressive development of energy discriminating x-ray detectors, and novel, target-specific, nanoparticle contrast agents promise to establish spectral CT as a powerful functional imaging modality. Common to all of these applications is the need for a material decomposition algorithm which is robust in the presence ...
Peyrin Françoise F INSERM U1044, CREATIS, 69621, Villeurbanne, France, - - 2014
Micro-computed tomography (micro-CT)-a version of X-ray CT operating at high spatial resolution-has had a considerable success for the investigation of trabecular bone micro-architecture. Currently, there is a lot of interest in exploiting CT techniques at even higher spatial resolutions to assess bone tissue at the cellular scale. After recalling the ...
Schulz B B Department of Diagnostic and Interventional Radiology, University Hospital Frankfurt, Johann Wolfgang Goethe-University, Theodor-Stern-Kai 7, D-60590 Frankfurt/Main, - - 2014
To analyze the clinical value and radiation dose of plain x-rays and CT in examining patients suspected of ingesting drug-filled packets. Thirty-eight patients with suspected internal concealment of drug-filled packets who were examined with plain x-rays or CT or both were included in the study. CT studies were performed using ...
Attia Mohamed F - - 2014
In this study, we investigated the role of the chemical nature of the oil droplet core of nano-emulsions used as contrast agents for X-ray imaging on their pharmacokinetics and biodistribution. To this end, we formulated PEGylated nano-emulsions with two iodinated oils, i.e. iodinated monoglyceride and iodinated castor oil, and compared ...
Ghosh Paulomi - - 2014
Radiopaque polymer derivatives were successfully prepared through surface diffusion mediated cross-linking of chitosan with iodinated 2,5-Dimethoxy-2,5-dihydrofuran. Incorporation of iodine in 2,5-Dimethoxy-2,5-dihydrofuran was validated by 1H NMR and mass spectroscopy. The cross-linking of the glucosamine moieties of chitosan with the iodinated product was confirmed by 13C NMR and energy-dispersive X-ray spectroscopy. ...
Clark Zachary E ZE School of Medicine, University of Alabama at Birmingham, Birmingham, - - 2014
Perform intra-patient comparison of attenuation values on lower keV dual-energy abdominal CT images using reduced IV contrast dose compared to conventional single energy polychromatic beam abdominal MDCT images using standard IV contrast dose. IRB approved retrospective evaluation of consecutive adults who had both standard IV contrast dosage conventional multiphasic MDCT ...
Lam Adrian A Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, 201 Dowman Dr, Atlanta, GA, 30322, USA, - - 2014
The aims of this study were to evaluate the ability of contrast-enhanced MRI to visualize the coronary veins with validation by the gold standard, X-ray venography, and to determine whether MRI can visualize the coronary vein branch used for left ventricular (LV) lead implantation. Nineteen (19) patients undergoing cardiac resynchronization ...
Steinberg Christian C Division of Electrophysiology, Institut universitaire de cardiologie et pneumologie de Québec (IUCPQ), Québec, - - 2014
Riata™ and Riata ST defibrillation leads (St. Jude Medical, Sylmar, CA, USA) are susceptible to insulation defects with conductor externalization. Cine-fluoroscopy is considered to be the gold standard for the documentation of insulation defects, but similar detection rates have been reported for posterior-anterior (PA)/lateral chest x-ray (CXR) with zooming. Prospective ...
Kandanapitiye Murthi S MS Department of Chemistry and Biochemistry and ‡Liquid Crystal Institute, Kent State University , Kent, Ohio 44240, United - - 2014
A unique decelerated hydrolytic procedure is developed and reported here for the preparation of ultrasmall nanoparticles (NPs) of PVP-coated BiOI with a narrow size distribution, i.e., 2.8 ± 0.5 nm. The crystal structure of this compound is determined by X-ray powder diffraction using the bulk materials. The stability, cytotoxicity, and ...
Wang Hailin H Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. Electronic address: - - 2014
Montmorillonite (MMT) modified with chitosan (CTS, molecular weight=5×10(4)) was applied to remove heavy metal cations by using Co(2+) as a model ion. An increase in MMT interlayer distance observed from X-ray diffraction indicates the intercalation of CTS into MMT. Together with the results of scanning electron microscopy and Fourier transform ...
Lee Seungwan S Department of Radiological Science, College of Health Science, Yonsei University, 1 Yonseidae-gil, Wonju, Gangwon-do 220-710, Republic of - - 2014
Dual-energy computed tomography (CT) techniques have been used to decompose materials and characterize tissues according to their physical and chemical compositions. However, these techniques are hampered by the limitations of conventional x-ray detectors operated in charge integrating mode. Energy-resolved photon-counting detectors provide spectral information from polychromatic x-rays using multiple energy ...
Wathen Connor A CA Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, 46556, - - 2014
Gold nanomaterials (AuNPs) represent a promising new class of contrast agents for X-ray computed tomographic (CT) imaging in both research and clinical settings. These materials exhibit superior X-ray absorption properties compared with other iodinated agents, and thus require lower injection doses. Gold is nonimmunogenic and therefore contributes to safety profile ...
Kim Donghwan - - 2014
Statistical X-ray computed tomography (CT) reconstruction can improve image quality from reduced dose scans, but requires very long computation time. Ordered subsets (OS) methods have been widely used for research in X-ray CT statistical image reconstruction (and are used in clinical PET and SPECT reconstruction). In particular, OS methods based ...
Antunovic Lidija L Nuclear Medicine Department, Humanitas Clinical and Research Institute, Via A. Manzoni 56, Rozzano, Milan 20089, - - 2014
Standardized procedures are fundamental to ensure reproducibility of medical actions. Diagnostic imaging is required to be standard as well, particularly when it has to be used as a biomarker in clinical trials. Several standard procedures and guidelines are available for the use of PET/CT with fludeoxyglucose F18 in oncology, because ...
Bisćević Mirza - - 2014
The aim of this work is to radiologicaly estimate the width, height and depth of bodies of thoracic and lumbal vertebras. Charts of one hundred and seventeen patients with implanted internal fixateur on the thoracic and lumbal spine, between 01.01.2008. and 31.3.2010. at the Department of Orthopedics and Traumatology - ...
Friedman Daniela B DB Department of Health Promotion, Education, and Behavior, University of South Carolina; Statewide Cancer Prevention and Control Program, University of South Carolina. Electronic address: - - 2014
Clinical trials (CTs) are important for advancing public health and medical research, however, CT recruitment is challenging. The high reading level of CT information and the technical language of providers or researchers can serve as barriers to recruitment. Prior studies on the informed consent process found that consent documents often ...
Bolwig Tom G TG From the University of Copenhagen and Psychiatric Center Copenhagen, - - 2014
Since the 1970s, a number of neuroimaging studies of electroconvulsive therapy (ECT) have been conducted to elucidate the working action of this highly efficacious treatment modality. The technologies used are single photon emission tomography, positron emission tomography, magnetic resonance imaging, magnetic resonance spectroscopy, and quantitative electroencephalography. A PubMed literature search ...
Roth Bradley J BJ Department of Physics, Oakland University, Rochester, MI, 48309, USA, - - 2014
Direct detection of neural activity with MRI would be a breakthrough innovation in brain imaging. A Lorentz force method has been proposed to image nerve activity using MRI; a force between the action currents and the static MRI magnetic field causes the nerve to move. In the presence of a ...
Dieterich Angela V AV School of Physiotherapy and Exercise Science, Curtin Health Innovation Research Institute (CHIRI), Curtin University , Perth , Australia - - 2014
Abstract The hip abductors gluteus medius (Gmed) and minimus (Gmin) differ slightly in function and how they are affected by hip joint pathology. A separate assessment of Gmed and Gmin is feasible by ultrasound (US) imaging. B-mode and M-mode US can be used to measure muscle thickness. Two B- and ...
Liuzza Marco Tullio MT - - 2014
Motor resonance (MR) contingent upon action observation is thought to occur largely automatically. Although recent studies suggest that this process is not completely impervious to top-down modulations, much less is known on the possible role of the moral connotation of observed action goal in modulating MR. Here we explored whether ...
Zuleta José Liders Burgos JL Magnetic Resonance Department, Advanced Medical Image Centre, La Paz, Bolivia ; Magnetic Resonance Department, Hospital Ángeles del Pedregal, México, DF 10700, - - 2014
Gelastic seizure was first described by Trousseau in 1877 and comes from the Greek word gelos (laughs), as laughter is the main feature [1]. Normal laughter is a reactive emotional behaviour and motor action that involves the limbic system, hypothalamus, temporal cortex, and several regions of the brainstem. A female ...
Kakakhel Muhammad B MB Pakistan Institute of Engineering and Applied Sciences. - - 2014
This study extends the 'zero scan' method for CT imaging of polymer gel dosimeters to include multislice acquisitions. Multislice CT images consisting of 24 slices of 1.2 mm thickness were acquired of an irradiated polymer gel dosimeter and processed with the zero scan technique. The results demonstrate that zero scan-based ...
Nawaz Shoukat S Research Center of Digital Radiation Imaging and Biomedical Imaging, Beijing University of Aeronautics and Astronautics, 100191 Beijing, People's Republic of - - 2014
X-ray computed tomography (CT) is a powerful clinical diagnosis tool and has been used widely in many clinical and biological settings. Metal artifacts, caused by high density implants, are commonly encountered in clinical CT applications, thereby affecting the detection of abnormal structures and undermining CT's diagnostic value. In this paper, ...
Fu Jian J Research Center of Digital Radiation Imaging and Biomedical Imaging, Beijing University of Aeronautics and Astronautics, Beijing 100191, People's Republic of - - 2014
X-ray phase contrast computed tomography (CT) uses the phase shift that x-rays undergo when passing through matter, rather than their attenuation, as the imaging signal and may provide better image quality in soft-tissue and biomedical materials with low atomic number. Here a geometry-constraint-scan imaging technique for in-line phase contrast micro-CT ...
Yeung Timothy Pok Chi TP Department of Medical Biophysics, Western University, London, Ontario, Canada; Robarts Research Institute, Western University, London, Ontario, Canada; London Regional Cancer Program, London, Ontario, - - 2014
The therapeutic efficacy of stereotactic radiosurgery for glioblastoma is not well understood, and there needs to be an effective biomarker to identify patients who might benefit from this treatment. This study investigated the efficacy of computed tomography (CT) perfusion imaging as an early imaging biomarker of response to stereotactic radiosurgery ...
Chan R C L RC Division of Head and Neck Surgery, Department of Surgery, Queen Mary Hospital, Hong - - 2014
Background. Accurate assessment of irradiated neck in squamous cell carcinoma of the head and neck (HNSCC) is essential. Fine-needle aspiration cytology is often performed for suspicious lesions but it is limited by its low negative predictive value (NPV). We postulated that F-18 fluorodeoxyglucose (FDG) positron emission tomography combined with computed ...
Wu Han-Chun HC 1] School of Physics, Beijing Institute of Technology, Beijing, 100081, P. R. China [2] KSU-Aramco Center, King Saud University, Riyadh 11451, Saudi - - 2014
Magnesium ferrite is a very important magnetic material due to its interesting magnetic and electrical properties and its chemical and thermal stability. Here we report on the magnetic and transport properties of epitaxial MgFe2O4 thin films grown on MgO (001) by molecular beam epitaxy. The structural properties and chemical composition ...
Chen Yi Y School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, - - 2014
The temporal resolution of current computed tomography (CT) systems is limited by the rotation speed of their gantries.OBJECTIVE: A helical interlaced source detector array (HISDA) CT, which is a stationary CT system with distributed X-ray sources and detectors, is presented in this paper to overcome the aforementioned limitation and achieve ...
Ashraf Alireza A Department of Physical Medicine and Rehabilitation, Shiraz University of Medical Sciences, Shiraz, Iran ; Burn Research Center, Shiraz University of Medical Sciences, Shiraz, - - 2013
The low correlation between the patients' signs and symptoms of carpal tunnel syndrome (CTS) and results of electrodiagnostic tests makes the diagnosis challenging in mild cases. Interpolation is a mathematical method for finding median nerve conduction velocity (NCV) exactly at carpal tunnel site. Therefore, it may be helpful in diagnosis ...
Coenen Adriaan - - 2013
To evaluate the effect of high-resolution scan mode and iterative reconstruction on lung nodule 3D volumetry. Solid nodules with various sizes (5, 8, 10 and 12 mm) were placed inside a chest phantom. CT images were obtained with various tube currents, scan modes (conventional mode, high-resolution mode) and iterative reconstructions [0, ...
Matsumoto Kinzo - - 2013
Cognitive deficits and behavioral and psychological symptoms of dementia (BPSD) are typical features of patients with dementia such as Alzheimer's disease (AD), vascular dementia (VD), and other forms of senile dementia. Clinical evidence has demonstrated the potential usefulness of chotosan (CTS) and yokukansan (YKS), traditional herbal formulations called Kampo medicines, ...
Livingston Michael H - - 2013
The purpose of this study was to determine the effective dose of radiation due to computed tomography (CT) scans in paediatric trauma patients at a level 1 Canadian paediatric trauma centre. We also explored the indications and actions taken as a result of these scans. We performed a retrospective review ...
Saha Pallashri - - 2013
Vibrio cholerae is one of the major bacterial pathogens responsible for the devastating diarrheal disease called cholera. Chemotherapy is often used against V. cholerae infections; however, the emergence of multidrug-resistant (MDR) V. cholerae towards the chemotherapeutic agents, is a serious clinical problem. This scenario has provided us with the impetus ...
Tsai Nai-Wen - - 2013
To compare the value of ultrasonography for diagnosing carpal tunnel syndrome (CTS) in patients with and without diabetes mellitus (DM). Eighty non-DM and 40 DM patients with electromyography-confirmed CTS were assessed and underwent high-resolution ultrasonography of the wrists. Cross-sectional area (CSA) and flattening ratio (FR) of the median nerve were ...
Kirchner Johannes - - 2013
OBJECTIVE: Observer performance tests were conducted to compare the effect of presenting digital luminescence radiography (DLR) monitor images in positive mode ("bones black") or negative mode ("bones white") in the detectability of subtle lung nodules. METHODS: Five radiologists independently reviewed digital radiographs of 55 patients with either (a) a single, ...
Monteith Stephen J - - 2013
Intracerebral hemorrhage remains a significant cause of morbidity and mortality. Current surgical therapies aim to use a minimally invasive approach to remove as much of the clot as possible without causing undue disruption to surrounding neural structures. Transcranial MR-guided focused ultrasound (MRgFUS) surgery is an emerging technology that permits a ...
Johnston Jennifer H - - 2013
BACKGROUND: Advanced multidetector CT systems facilitate volumetric image acquisition, which offers theoretic dose savings over helical acquisition with shorter scan times. OBJECTIVE: Compare effective dose (ED), scan duration and image noise using 320- and 64-detector CT scanners in various acquisition modes for clinical chest, abdomen and pelvis protocols. MATERIALS AND ...
Lee Hye Jin - - 2013
To evaluate each digital branch of the median sensory nerve and motor nerves to abductor pollicis brevis (APB) and 2nd lumbrical (2L) according to the severity of carpal tunnel syndrome (CTS). A prospective study was performed in 67 hands of 41 patients with CTS consisting of mild, 23; moderate, 27; ...
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