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Ouriadov A A Imaging Research Laboratories, Robarts Research Institute, Western University, London, - - 2014
Diffusion-weighted (DW) hyperpolarized (129) Xe morphometry magnetic resonance imaging (MRI) can be used to map regional differences in lung tissue micro-structure. We aimed to generate absolute xenon concentration ([Xe]) and alveolar oxygen partial pressure (pA O2 ) maps by extracting the unrestricted diffusion coefficient (D0 ) of xenon as a ...
Bhuva Anish N AN The Heart Hospital Imaging Centre, University College London Hospitals, 16-18 Westmoreland Street, London, W1G 8PH, - - 2014
Cardiovascular magnetic resonance is an important tool for patient care and is the best test for myocardial structure and function. Ischemia and scar imaging also provide key insights and focus attention on heart muscle - the site of most cardiac diseases. New ways of measuring abnormal muscle have been developed, ...
Roy Snehashis S Center for Neuroscience and Regenerative Medicine, Henry Jackson Foundation, Bethesda, Maryland - - 2014
Integrated PET/MR systems are becoming increasingly popular in clinical and research applications. Quantitative PET reconstruction requires correction for γ-photon attenuations using an attenuation coefficient map (μ map) that is a measure of the electron density. One challenge of PET/MR, in contrast to PET/CT, lies in the accurate computation of μ ...
Govindarajan Sindhuja T ST Athinoula A. Martinos Center for Biomedical Imaging, Charlestown, MA, - - 2014
To assess the test-retest reproducibility of cortical mapping of T2 * relaxation rates at 7 Tesla (T) MRI. T2 * maps have been used for studying cortical myelo-architecture patterns in vivo and for characterizing conditions associated with changes in iron and/or myelin concentration. T2 * maps were calculated from 7T ...
Morgan P P Department of Orthopaedic Surgery, University of Minnesota, 2512 South 7th Street, Minneapolis, MN, 55454, - - 2014
Articular cartilage assessment in femoroacetabular impingement (FAI) is challenging. Recent studies on T2* relaxation time mapping suggest the technique may be useful in diagnosing cartilage damage. The purpose of this case report is to describe how quantitative T2*-mapping may improve cartilage assessment of the acetabulum in patients with FAI. MR ...
Svenningsen Sarah S Imaging Research Laboratories, Robarts Research Institute, Western University, 1151 Richmond St North, London, Ontario, Canada N6A 5B7; Department of Medical Biophysics, The University of Western Ontario, London, Ontario, - - 2014
Hyperpolarized (3)He magnetic resonance imaging (MRI) previously revealed the temporal and spatial heterogeneity of ventilation defects in asthmatics, but these findings have not been used in treatment studies or to guide personalized therapy. Our objective was to exploit the temporal and spatial information inherent to (3)He MRI and develop image ...
Fujii Keita K Department of Radiological Technology, Tokyo University - - 2014
Magnetic resonance imaging (MRI) enables the evaluation of organ structure and function. Oxygen-enhanced MRI (O2-enhanced MRI) is a method for evaluating the pulmonary ventilation function using oxygen as a contrast agent. We created the Cine View of Relative Enhancement Ratio Map (Cine RER map) in O2-enhanced MRI to easily observe ...
DeYoe Edgar A EA Department of Radiology, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, USA. Electronic address: - - 2014
Functional magnetic resonance imaging (fMRI) is used clinically to map the visual cortex before brain surgery or other invasive treatments to achieve an optimal balance between therapeutic effect and the avoidance of postoperative vision deficits. Clinically optimized stimuli, behavioral task, analysis, and displays permit identification of cortical subregions supporting high-acuity ...
Tao Qian Q Division of Image Processing (LKEB), Department of Radiology, Leiden University Medical Center, PO BOX 9600, 2300 RC, Leiden, The Netherlands, - - 2014
To present and validate a highly automated MRI analysis workflow for image-guided catheter ablation of scar-related ventricular tachycardia (VT) ablation procedures. A cohort of 15 post-infarction patients underwent MRI prior to VT ablation. The MRI study included a black-blood turbo spin echo sequence for visualizing the aortic root and ostium ...
Monsen Karen A KA School of Nursing, University of Minnesota , Minneapolis, MN , USA - - 2014
Rigor in clinical knowledge representation is necessary foundation for meaningful interoperability, exchange and reuse of electronic health record (EHR) data. It is critical for clinicians to understand principles and implications of using clinical standards for knowledge representation within EHRs. Purpose: To educate clinicians and students about knowledge representation and to ...
Kim Dong Hyun - - 2014
Electrical conductivities of biological tissues show frequency-dependent behaviors, and these values at different frequencies may provide clinically useful diagnostic information. MR-based tissue property mapping techniques such as MREIT and MREPT are widely used and provide unique conductivity contrast information over different frequency ranges. Recently, a new method for data acquisition ...
Izquierdo-Garcia David D Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Charlestown, - - 2014
We present an approach for head MR-based attenuation correction (AC) based on the Statistical Parametric Mapping 8 (SPM8) software, which combines segmentation- and atlas-based features to provide a robust technique to generate attenuation maps (μ maps) from MR data in integrated PET/MR scanners. Coregistered anatomic MR and CT images of ...
Bauer Sonja S From the Department of Neurology (S.B., A.S., O.C.S.), Institute for Neuroradiology (M.W., E.H.); and Brain Imaging Center (R.D., U.N.), University Hospital Frankfurt, Goethe University, Frankfurt, - - 2014
Quantitative T2'-mapping detects regional changes in the relation of oxygenated and deoxygenated haemoglobine and might reflect areas with increased oxygen extraction. T2'-mapping in conjunction with an elaborate algorithm for motion correction was performed in patients with acute large-vessel stroke, and quantitative T2'-values were determined within the diffusion-weighted imaging lesion and ...
Martin John T JT Translational Musculoskeletal Research Center, Philadelphia VA Medical Center, Philadelphia, Pennsylvania; Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, Pennsylvania; Department of Mechanical Engineering and Applied Mechanics, University of Pennsylvania, Philadelphia, - - 2014
Magnetic resonance imaging (MRI) with T2-weighting is routinely performed to assess intervertebral disc degeneration. Standard clinical evaluations of MR images are qualitative, however, and do not focus on region-specific alterations in the disc. Utilizing a rabbit needle puncture model, T2 mapping was performed on injured discs to develop a quantitative ...
Siversson C C Computational Radiology Laboratory, Department of Radiology, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA; Department of Medical Radiation Physics, Lund University, Malmö, Sweden. Electronic address: - - 2014
The quantitative interpretation of hip cartilage magnetic resonance imaging (MRI) has been limited by the difficulty of identifying and delineating the cartilage in a three-dimensional (3D) dataset, thereby reducing its routine usage. In this paper a solution is suggested by unfolding the cartilage to planar two-dimensional (2D) maps on which ...
Rehnitz C C Department of Diagnostic and Interventional Radiology, University Hospital Heidelberg, Im Neuenheimer Feld 110, D-69120 Heidelberg, Germany. Electronic address: - - 2014
To prospectively compare chemical-exchange saturation-transfer (CEST) with delayed gadolinium-enhanced MRI of cartilage (dGEMRIC) and T2 mapping to assess the biochemical cartilage properties of the knee. Sixty-nine subjects were prospectively included (median age, 42 years; male/female = 32/37) in three cohorts: 10 healthy volunteers, 40 patients with clinically suspected cartilage lesions, and 19 ...
Hamlin Scott A SA From the Department of Radiology and Imaging Sciences, Division of Cardiothoracic Imaging (S.A.H., T.S.H., B.P.L., A.E.S.), and Department of Cardiology (S.L.), Emory University School of Medicine, 1364 Clifton Rd NE, Room D125A, Atlanta, GA - - 2014
Cardiac magnetic resonance (MR) imaging has grown over the past several decades into a validated, noninvasive diagnostic imaging tool with a pivotal role in cardiac morphologic and functional assessment and tissue characterization. With traditional cardiac MR imaging sequences, assessment of various pathologic conditions ranging from ischemic and nonischemic cardiomyopathy to ...
House Michael J - - 2014
MRI assessment of cardiac iron is particularly important for assessing transfusion-dependent anaemia patients. However, comparing the iron distribution from histology or bulk samples to MRI is not ideal. Non-destructive, high-resolution imaging of post-mortem samples offers the ability to examine iron distributions across large samples at resolutions closer to those used ...
Hahnemann Maria L ML From the *Department of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, †Erwin L. Hahn Institute for Magnetic Resonance Imaging, University Duisburg-Essen, and ‡Department of Gastroenterology and Hepatology, University Hospital Essen, - - 2014
The objective of this study was to evaluate whether the use of automatically generated maps of bowel motility (motility mapping) in magnetic resonance imaging (MRI) leads to an increased detection rate of inflammatory bowel disease. Fifty consecutive patients with suspected or known inflammatory bowel disease who underwent bowel MRI using ...
Berte B B From the Hôpital Cardiologique du Haut-L'évêque, Université de Bordeaux, LIRYC Institut:, IHU LIRYC ANR-10-IAHU-04 et Equipex MUSIC ANR-11-EQPX-0030, Bordeaux, - - 2014
Nonischemic cardiomyopathy (NICM) is a heterogeneous condition providing a favorable substrate for VT. The purpose of this study is to further characterize the substrate in a subset of post-myocarditis patients with epicardial-only scar. Twelve post-myocarditis patients (11 male, 49 ± 14yrs, LVEF 49 ± 12%) with ventricular tachycardia (VT) and ...
Fuxjager Matthew J MJ Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA - - 2014
Loggerhead sea turtle hatchlings (Caretta caretta) use regional magnetic fields as open-ocean navigational markers during trans-oceanic migrations. Little is known, however, about the ontogeny of this behaviour. As a first step towards investigating whether the magnetic environment in which hatchlings develop affects subsequent magnetic orientation behaviour, eggs deposited by nesting ...
Yarnykh Vasily L VL From the Department of Radiology, University of Washington, 1959 NE Pacific St, Seattle, WA 98195 (V.L.Y., K.R.M.); Multiple Sclerosis Center (J.D.B., P.R., A.M., P.Q., B.G., L.K.J.H.) and Department of Radiology (B.P.K.), Swedish Neuroscience Institute, Seattle, Wash; and Department of Radiology, University of Wisconsin, Madison, Wis - - 2014
Purpose To evaluate the clinical utility of fast whole-brain macromolecular proton fraction (MPF) mapping in multiple sclerosis (MS) and compare MPF with established quantitative magnetic resonance (MR) imaging measures of tissue damage including magnetization transfer (MT) ratio and relaxation rate (R1). Materials and Methods In this institutional review board-approved and ...
Sasaki Naoko N Division of Cardiology, Department of Medicine, Nihon University School of Medicine, Tokyo, - - 2014
Catheter tip contact force (CF) and 3-dimensional (3D) maps are key to mapping and ablation of atrial fibrillation (AF). To determine the relation between CF and 3D map surfaces. We conducted a validation study of Carto-based 3D ultrasound (3D-US) and 3D-US merged with CT (3D-Merge-CT) left atrium/pulmonary vein (PV) images. ...
Allones J L JL Department of Electronics and Computer Science Campus Vida, University of Santiago de Compostela, Santiago de Compostela, La Coruña, 15782, Spain, - - 2014
Clinical terminologies are considered a key technology for capturing clinical data in a precise and standardized manner, which is critical to accurately exchange information among different applications, medical records and decision support systems. An important step to promote the real use of clinical terminologies, such as SNOMED-CT, is to facilitate ...
Thornhill Rebecca E RE The Ottawa Hospital, Ottawa, Ontario, - - 2014
To determine if differentiation of lipoma from liposarcoma on magnetic resonance imaging can be improved using computer-assisted diagnosis (CAD). Forty-four histologically proven lipomatous tumors (24 lipomas and 20 liposarcomas) were studied retrospectively. Studies were performed at 1.5T and included T1-weighted, T2-weighted, T2-fat-suppressed, short inversion time inversion recovery, and contrast-enhanced sequences. ...
Chung Yong Eun YE Department of Radiology, Research Institute of Radiological Science, Severance Hospital, Yonsei University College of Medicine, 250 Seongsanno, Seodaemun-gu, Seoul, - - 2014
ABSTRACT Purpose/Aim of the study. To assess the feasibility of krypton-enhanced ventilation CT using dual energy (DE) technique for various krypton concentrations and to determine the appropriate krypton concentration for DE ventilation CT through an animal study. Materials and Methods. Baseline DECT was first performed on seven New Zealand white ...
Beeres Martin M Department of Diagnostic and Interventional Radiology, Clinic of the Goethe University, Frankfurt, Germany - - 2014
Computed tomography (CT) gantry rotation time is one factor influencing image quality. Until now, there has been no report investigating the influence of gantry rotation time on chest CT image quality. To investigate the influence of faster gantry rotation time on image quality and subjective and objective image parameters in ...
Schaap Kristel K Institute for Risk Assessment Sciences, Division of Environmental Epidemiology, Utrecht University, Utrecht 3508 TD, Netherlands; - - 2014
Clinical and research staff who work around magnetic resonance imaging (MRI) scanners are exposed to the static magnetic stray fields of these scanners. Although the past decade has seen strong developments in the assessment of occupational exposure to electromagnetic fields from MRI scanners, there is insufficient insight into the exposure ...
Reurink Gustaaf G Department of Orthopedics, Erasmus Medical Centre, Room Hs-104, PO Box 2040, 3000 CA, Rotterdam, The Netherlands, - - 2014
Sports physicians are increasingly requested to perform magnetic resonance imaging (MRI) of acute hamstring muscle injuries and to provide a prognosis of the time to return to play (RTP) on the basis of their findings. To systematically review the literature on the prognostic value of MRI findings for time to ...
Pittschieler Elisabeth E Department of Orthodontics, Bernhard Gottlieb University Clinic of Dentistry, Medical University of Vienna, Sensengasse 2a, 1090 Vienna, Austria. Electronic address: - - 2014
To 1) test the feasibility of delayed Gadolinium-Enhanced Magnetic Resonance Imaging of Cartilage (dGEMRIC) at 3 T in the temporomandibular joint (TMJ) and 2) to determine the optimal delay for measurements of the TMJ disc after i.v. contrast agent (CA) administration. MRI of the right and left TMJ of six ...
Weissler Bjoern B Clinical Application Research, Philips Research Europe-Aachen, Pauwelsstrasse 17, D-52074 Aachen, Germany. Department of Physics of Molecular Imaging Systems, Institute of Experimental Molecular Imaging, RWTH Aachen University, Pauwelsstrasse 20, D-52074 Aachen, Germany. Institute of High Frequency Technology, RWTH Aachen University, Melatener Straße 25, D-52074 Aachen, Germany, Pauwelsstrasse 20, D-52074 Aachen, - - 2014
The combination of Positron Emission Tomography (PET) and Magnetic Resonance Imaging (MRI) into a single device is being considered a promising tool for molecular imaging as it combines the high sensitivity of PET with the functional and anatomical images of MRI. For highest performance, a scalable, MR compatible detector architecture ...
Takayama Tatsuya - - 2014
New imaging modalities to assess the efficacy of drugs that have molecular targets remain under development. Here, we describe for the first time the use of time-resolved three-dimensional phase-contrast magnetic resonance imaging to monitor changes in blood supply to a tumor during sunitinib treatment in a patient with localized renal ...
Menegaux F F Service de chirurgie générale, viscérale et endocrinienne, hôpital de la Pitié-Salpetrière, 47, boulevard de l'Hôpital, 75013 Paris, France. Electronic address: - - 2014
Improvements in medical imaging have resulted in the incidental discovery of many silent and unrecognized adrenal tumors. The term "adrenal incidentaloma" (AI) is applied to any adrenal mass≥1cm in its longest axis that is discovered incidentally during abdominal imaging that was not performed to specifically evaluate adrenal pathology. These incidentalomas ...
Rogers Harriet J HJ aSchool of Experimental Psychology and Bristol Clinical Research and Imaging Centre, University of Bristol, Bristol, UK bDepartment of Neurobiology, A.I. Virtanen Institute, University of Eastern Finland, Kuopio, - - 2014
One in four ischaemic stroke patients are ineligible for thrombolytic treatment due to unknown onset time. Quantification of absolute MR relaxation times and signal intensities are potential methods for estimating stroke duration. We compared the accuracy of these approaches and determined whether changes in relaxation times and signal intensities identify ...
Rube Martin A MA Division of Imaging and Technology, Institute for Medical Science and Technology, University of Dundee, Wilson House, 1 Wurzburg Loan, Dundee, DD2 1FD, UK, - - 2014
Interventional MRI has significant potential for image guidance of iliac angioplasty and related vascular procedures. A technology framework with in-room image display, control, communication and MRI-guided intervention techniques was designed and tested for its potential to provide safe, fast and efficient MRI-guided angioplasty of the iliac arteries. A 1.5-T MRI ...
Aellen Jerome J University Institute for Diagnostic and Interventional Neuroradiology, University Hospital Bern and Inselspital, University of Bern, Freiburgstrasse 4, 3010, Bern, - - 2014
To investigate pathological findings in the susceptibility weighted imaging (SWI) of patients experiencing convulsive (CSE) or non-convulsive status epilepticus (NCSE) with focal hyperperfusion in the acute setting. Twelve patients (six with NCSE confirmed by electroencephalogram (EEG) and six patients with CSE with seizure event clinically diagnosed) underwent MRI in this ...
Zhu Honglei H Department of Otolaryngology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, - - 2014
It has been reported that about half of patients with sudden sensorineural hearing loss (SSNHL) show high signals in the affected inner ear on three-dimensional, fluid-attenuated inversion recovery magnetic resonance imaging (3D-FLAIR MRI). These signals may reflect minor hemorrhage or an increased concentration of protein in the inner ear, which ...
Detiger Suzanne E L SE Department of Orthopaedic Surgery, VU University Medical Center, De Boelelaan 1117, 1081 HV, Amsterdam, The Netherlands, - - 2014
To evaluate intervertebral disc (IVD) degeneration and treatments, an objective diagnostic tool is needed. Recently, T2* relaxation time mapping was proposed as a technique to assess early IVD degeneration, yet the correlation with biochemical content and histological features has not been investigated previously. Our objective was to validate T2* mapping ...
Tong Elizabeth E Department of Radiology, Neuroradiology Division, University of Virginia, Box 800170, Charlottesville, VA, 22908, - - 2014
Utilizing CT angiography enhances image quality in PCT, thereby permitting acquisition at ultra-low dose. Dynamic CT acquisitions were obtained at 80 kVp with decreasing tube current-time product [milliamperes × seconds (mAs)] in patients suspected of ischemic stroke, with concurrent CTA of the cervical and intracranial arteries. By utilizing fast Fourier transformation, ...
Gasiorowski Janik C JC Department of Clinical Studies, New Bolton Center, School of Veterinary Medicine, University of Pennsylvania, Kennett Square, - - 2014
To describe clinical use of computed tomography (CT) and hoof surface markers to facilitate internal fixation within the confines of the hoof wall. Retrospective case series. Horses (n = 16) that had CT-guided internal fixation of the distal phalanx (DP) or distal sesamoid bone (DSB). Drill bit entry point and direction were ...
Eitel Charlotte C Department of Electrophysiology, University of Leipzig, Heart Center, Struempellstrasse 39, 04289, Leipzig, Germany, - - 2014
Real-time magnetic resonance imaging (MRI) combines the advantages of excellent soft-tissue characterization in a true 3D anatomical and functional model with the possibility of lesion and gap visualization without the need of any radiation. Therefore, real-time MRI presents a particularly attractive imaging technology to guide electrophysiology studies and catheter ablation ...
Leigh Richard R aDepartments of Neurology and Radiology bDepartment of Neurology and Neuroscience, Johns Hopkins University, Baltimore, Maryland, - - 2014
To summarize what is known about the use of MRI in acute stroke treatment (predominantly thrombolysis), to examine the assumptions and theories behind the interpretation of magnetic resonance images of acute ischemic stroke and how they are used to select patients for therapies, and to suggest directions for future research. ...
Evertsson Maria - - 2014
Detection and removal of sentinel lymph nodes (SLN) is important in the diagnosis and treatment of cancer. The SLN is the first regional lymph node draining the primary tumor, and if the cancer has spread, it is most likely to find metastases in the SLN. In this study, we have ...
Oh Tong In TI Impedance Imaging Research Center and Department of Biomedical Engineering, Kyung Hee University, Seoul, - - 2014
Magnetic resonance electrical impedance tomography (MREIT) is a promising non-invasive method to visualize a static cross-sectional conductivity and/or current density image by injecting low frequency currents. MREIT measures one component of the magnetic flux density caused by the injected current using a magnetic resonance (MR) scanner. For practical in vivo ...
Kolbitsch Christoph C Division of Imaging Sciences and Biomedical Engineering, King's College London, London SE1 7EH, United - - 2014
Positron emission tomography (PET) is a highly sensitive medical imaging technique commonly used to detect and assess tumor lesions. Magnetic resonance imaging (MRI) provides high resolution anatomical images with different contrasts and a range of additional information important for cancer diagnosis. Recently, simultaneous PET-MR systems have been released with the ...
Kolb A A Werner Siemens Imaging Center, Department of Preclinical Imaging and Radiopharmacy, Eberhard Karls University, 72076 Tübingen, - - 2014
The aim of this study was to develop a prototype PET detector module for a combined small animal positron emission tomography and magnetic resonance imaging (PET/MRI) system. The most important factor for small animal imaging applications is the detection sensitivity of the PET camera, which can be optimized by utilizing ...
Walton Simon S Oxford e-Research Centre, Oxford University, 7 Keble Road, Oxford, OX1 3QG, UK. Electronic address: - - 2014
Cardiovascular magnetic resonance (CMR) imaging is an essential technique for measuring regional myocardial function. However, it is a time-consuming and cognitively demanding task to interpret, identify and compare various motion characteristics based on watching CMR imagery. In this work, we focus on the problems of visualising imagery resulting from 2D ...
Yoshikawa Shushi S Central Radiology Department, Osaka Medical - - 2014
Alongside current improvements in the performance of computer tomography (CT) systems, there has been an increase in the use of bolus tracking (BT) to acquire arterial dominant phase images for dynamic CT at optimal timing for characterization of liver focal lesions. However, optimal BT settings have not been established. In ...
Gaeta Michele M Section of Radiological Sciences, Department of Biomedical Sciences and Morphologic and Functional Imaging, University of Messina, - - 2014
To investigate the value of diffusion-weighted (DW), perfusion-sensitive, and dynamic contrast-enhanced (DCE) magnetic resonance imaging (MRI) techniques in assessing the response of bone metastases from breast cancer to radiotherapy, with particular emphasis on the role of intravoxel incoherent motion (IVIM)-DW parameters as a potential valuable imaging marker of tumor response. ...
Inokuchi Go G Departments of Legal Medicine, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba, 260-8670, Japan, - - 2014
One of the advantages of postmortem imaging is its ability to obtain diagnostic findings in a non-destructive manner when autopsy is either difficult or may destroy forensic evidence. In recent years, efforts have been made to incorporate computed tomography (CT) based postmortem angiography into forensic pathology; however, it is not ...
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