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Huang Yanqi Y Department of Radiology, Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China; Graduate College, Southern Medical University, Guangzhou, - - 2014
Our aim was to prospectively evaluate the feasibility of diffusional kurtosis imaging (DKI) in normal human kidney and to report preliminary DKI measurements. Institutional review board approval and informed consent were obtained. Forty-two healthy volunteers underwent diffusion-weighted imaging (DWI) scans with a 3-T MR scanner. b values of 0, 500 ...
Bester M M Department of Diagnostic and Interventional Neuroradiology, University Medical Centre Hamburg-Eppendorf (UKE), Germany/ Department of Radiology, Langone Medical Center, NYU School of Medicine, NY, - - 2014
Non-Gaussian diffusion imaging by using diffusional kurtosis imaging (DKI) allows assessment of isotropic tissue as of gray matter (GM), an important limitation of diffusion tensor imaging (DTI). In this study, we describe DKI and DTI metrics of GM in multiple sclerosis (MS) patients and their association with cognitive deficits. Thirty-four ...
Yang Chunna C Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, 100875, Beijing, P. R. China. - - 2014
Here we synthesized silica-coated NaYF4:Yb,Tm@NaGdF4 nanoparticles with hypocrellin photosensitizers covalently incorporated inside the silica shells, combining dual modal imaging and photodynamic therapy (PDT) functions together. Under excitation at 980 nm, the tumor-targeting specificity of the as-prepared nanomaterials efficiently enhanced as folic acid (FA) was conjugated. The internalization of UCNPs@SiO2@hypocrellin A-FA ...
Manfré Luigi L Department of Minimal Invasive Spine Therapy, Cannizzaro Hospital; Catania, Italy - - - 2014
The prevalence of sacroiliac Joint (SIJ) disease as a cause of LBP is considered to range from 21% to 25%. Nevertheless, SIJ instability is frequently underestimated. Although conventional surgery has been used for several years in an attempt to stabilize the SIJ, a new percutaneous system has been proposed for ...
Tovar-Moll Fernanda F Neuroimmunology Branch, National Institute of Neurological Disorders and Stroke (NINDS), National Institute of Health (NIH), Bethesda, MD; D'Or Institute for Research and Education (IDOR), Rio de Janeiro, Brazil; Institute of Biomedical Sciences and National Center of Structural Biology and Bioimaging (CENABIO), Federal University of Rio de Janeiro, Rio de Janeiro, - - 2014
We investigated the impact of focal and diffuse corticospinal tracts damage on sensory-motor disability in multiple sclerosis (MS) patients. Twenty-five MS patients underwent 3.0 Tesla (3T) magnetic resonance imaging with diffusion tensor imaging (DTI). The Expanded Disability Status Scale (EDSS) and the Timed 25-Foot Walk test (T25FW) quantified patient physical ...
Nowrangi Milap A MA Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine and Johns Hopkins Bayview Medical Center, Baltimore, MD, - - 2014
Impairment in executive function (EF) is commonly found in Alzheimer's disease (AD) and mild cognitive impairment (MCI). Atlas-based diffusion tensor imaging (DTI) methods may be useful in relating regional integrity to EF measures in MCI and AD. 66 participants (25 normal controls, 22 MCI, and 19 AD) received DTI scans ...
Hernando Diego D Department of Radiology, University of Wisconsin - Madison, Madison, WI, United States. Electronic address: - - 2014
The purpose of this work was to investigate the effect of a hepatocyte-specific gadolinium based contrast agent (GBCA) on quantitative hepatic fat-fraction (FF) and R2* measurements. Fifty patients were imaged at 1.5T, using chemical-shift encoded water-fat MRI with low (5°) and high (15°) flip angles (FA), both before and after ...
Anaya García Mitzi Sarahí MS Hospital Imagen [The Imagen Hospital], Distrito Federal, - - 2014
Conventional magnetic resonance imaging (MRI) allows investigators and clinicians to observe the anatomy and injuries of the cerebral white matter (CWM) in dogs. However, dynamic images based on the diffusion tensor (DT) technique are required to assess fiber tract integrity of the CWM. Diffusion tensor tractography (DTT) produces a three-dimensional ...
Brandstack N N Department of Radiology, Helsinki University Hospital, PL 340, 00029, HUS, Finland, - - 2014
Reproducibility of two different methods for quantifying fiber tracts by using a diffusion tensor imaging (DTI) sequence suitable for clinical magnetic resonance imaging (MRI) protocols was evaluated. DTI of 15 subjects was used to analyze intra-rater and inter-rater reproducibility. Another 10 subjects underwent MRI twice for assessment of between-scan reliability. ...
Ertan Gulhan G Division of Pediatric Radiology, Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine; Baltimore, MD, USA - - - 2014
Neurofibromatosis bright objects (NBOs) are poorly understood. This article aimed to investigate: 1) differences in fractional anisotropy (FA) between NBOs based in gray matter (GM) and white matter (WM), and 2) the relationship between NBOs and the affected white matter tracts. Fourteen NF1 patients were included in this study. Apparent ...
Rostoker Guy G From the *Nephrology and Dialysis Unit and †Division of Radiology, Hôpital Privé Claude Galien, Générale de Santé, Quincy Sous Sénart, - - 2014
During the past 2 decades, routine use of recombinant erythropoiesis-stimulating agents (ESAs) has enabled anemia to be corrected in dialysis patients, thereby improving their quality of life and permitting better outcomes. As successful use of ESA requires sufficient available iron, almost all end-stage renal disease patients on ESA now receive ...
Song Daniel J DJ Orthopaedic Surgery Service, Landstuhl Regional Medical Center, Landstuhl, Germany. Electronic address: - - 2014
The purpose of this study was to describe the epidemiology and demographics of surgically treated shoulder instability stratified by direction. We hypothesized that there would be an increased frequency of posterior and combined shoulder instability in our population compared with published literature. Secondarily, we assessed preoperative magnetic resonance imaging (MRI) ...
Bode Michaela K MK Department of Diagnostic Radiology, Oulu University Hospital, Oulu, Finland - - 2014
Diffusion tensor imaging (DTI) is a magnetic resonance imaging (MRI) technique enabling visualization and measurement of white matter tracts. Attention deficit hyperactivity disorder (ADHD) has been studied with DTI earlier with variable results, yet there is little research on remitted ADHD. To compare the brain white matter between ADHD drug ...
Ledger Araminta E W AE Cancer Research - United Kingdom (CR-UK) Cancer Imaging Centre, Institute of Cancer Research and Royal Marsden NHS Foundation Trust, Downs Rd, Sutton, Surrey SM2 5PT, United - - 2014
To retrospectively investigate the effect of flip angle (FA) and k-space sampling on the performance of dynamic contrast-enhanced (DCE-) magnetic resonance imaging (MRI) breast sequences. Five DCE-MRI breast sequences were evaluated (10°, 14°, and 18° FAs; radial or linear k-space sampling), with 7-10 patients in each group (n = 45). All sequences ...
Cui Jiao-Long JL Department of Orthopaedics and Traumatology, The University of Hong Kong, 12 Sandy Bay Road, Pokfulam, Hong - - 2014
Cervical spondylotic myelopathy (CSM) is a common spinal cord disorder in the elderly. Diffusion tensor imaging (DTI) has been shown to be of great value for evaluating the microstructure of nerve tracts in the spinal cord. Currently, the quantitative assessment of the degeneration on the specific tracts in CSM is ...
Chaudhry U S US From the Department of Radiology (U.S.C., D.E.D., B.A.P.) and Section of Neuroradiology (D.E.D., B.A.P.), University of Iowa Hospitals and Clinics, Iowa City, - - 2014
Enhancing lesions on brain MR imaging can present a diagnostic quandary as both benign lesions such as brain capillary telangiectasia and pathologic lesions such as demyelination may appear similar. Stagnation of blood in low-flow venous channels of brain capillary telangiectasias results in susceptibility effect secondary to the increased local deoxyhemoglobin. ...
Oh Jungsu S JS Departments of aNuclear Medicine bNeurology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South - - 2014
The cerebellum (CB) consists of complex anatomical and functional subregions. To better investigate the complicated functional anatomy, a detailed subregional analysis and/or a precise spatial normalization of the fluorine-18 fluorodeoxyglucose (F-FDG) PET imaging data are essential. Here, the 28 MRIcron CB volumes of interests (VOIs) template merged into eight cerebellar ...
Koh Sung Hye SH Department of Radiology, Hallym University Sacred Heart Hospital, Gwanpyeong-ro 170 beon-gil, Dongan-gu, Anyang-si, Gyeonggi-do, 431-796, Republic of Korea; Department of Radiology, Kangwon National University Hospital, Baengnyeong-ro 156, Chuncheon-Si, Gangwon-Do, 200-722, Republic of - - 2014
To compare the performance of anatomical magnetic resonance imaging (MRI) with that of diffusion tensor imaging (DTI) in the diagnosis of carpal tunnel syndrome (CTS). We performed 3T anatomical MRI and DTI on 42 patients and 42 age-matched controls. The median nerve cross-sectional area (CSA), relative median nerve signal intensity, ...
Gliebus Gediminas G Department of Neurology, Hahnemann University Hospital, Philadelphia, - - 2014
A 19-month-old, white, Pennsylvanian boy, with an unremarkable medical history, presented to our hospital with a 3-week history of nonbloody, nonbilious emesis up to 5 times a day and nonbloody diarrhea. Ten days before admission, his gait became progressively unsteady, until he finally refused to walk. A day before admission, ...
Solbach K K Department of Neurology, University of Duisburg-Essen, Hufelandstr. 55, Essen 45147, - - 2014
In Friedreich's ataxia (FA) the genetically decreased expression of the mitochondrial protein frataxin leads to disturbance of the mitochondrial iron metabolism. Within the cerebellum the dentate nuclei (DN) are primarily affected. Histopathological studies show atrophy and accumulation of mitochondrial iron in DN. Dentate iron content has been suggested as a ...
Hatton Sean N SN Clinical Research Unit, Brain & Mind Research Institute, University of Sydney, NSW, - - 2014
Evidence shows that there are reductions in gray matter volume (GMV) and changes in long association white matter fibres within the left insula-temporoparietal junction (TPJ) during the early stages of psychotic disorders but less is known about short association fibres (sAFs). In this study we sought to characterise the changes ...
Lense Miriam D MD Vanderbilt Kennedy Center, Vanderbilt University, Nashville, TN 37203, USA. - - 2014
Congenital amusia is defined by marked deficits in pitch perception and production. Though historically examined only in otherwise typically developing (TD) populations, amusia has recently been documented in Williams syndrome (WS), a genetic, neurodevelopmental disorder with a unique auditory phenotype including auditory sensitivities and increased emotional responsiveness to music but ...
Edlow Brian L - - 2012
Intracerebral hemorrhage (ICH) expansion is common during the first 24 h after onset, but the pattern and pace of hyperacute hemorrhage growth have not been described because serial imaging is typically performed over the course of hours and days, not minutes. The purpose of this study is to elucidate the spatial ...
Rusu Mugurel Constantin - - 2012
The anatomy of the pterygopalatine fossa keeps a traditional level and is viewed as constant, even though a series of structures neighboring the fossa are known to present individual variations. We aimed to evaluate on 3D volume renderizations the anatomical variables of the pterygopalatine fossa, as related to the variable ...
Tuite Michael J - - 2012
PURPOSE: To determine the prevalence of a normal variant cleft/recess at the labral-chondral junction in the anterior, inferior, and posterior portions of the shoulder joint. MATERIALS AND METHODS: One hundred and three consecutive patients (106 shoulders) who had a direct MR arthrogram followed by arthroscopic surgery were enrolled in this ...
Moon Chan Hong - - 2012
Development of a dual-tuned proton/sodium radiofrequency (RF) coil for magnetic resonance imaging (MRI) of the rabbit spine and quantification of sodium concentration in intervertebral discs. To develop the dual-tuned proton/sodium MRI of rabbit lumbar spine to investigate proteoglycan matrix content and intervertebral disc degeneration (IDD). IDD is a common chronic ...
Moon Chan Hong - - 2012
Comparison of sodium concentration ([Na]) and proton T2 relaxation time between normal and degenerated discs in a rabbit model. The purpose of this article was to evaluate quantitative [Na] and T2 characteristics of discs associated with degenerative changes. Intervertebral disc degeneration is a common chronic condition that may lead to ...
Kranenburg Hendrik-Jan C - - 2012
A hydrogel nucleus pulposus prosthesis (NPP) was designed to swell in situ, have intrinsic radiopacity, and restore intervertebral disc height and biomechanical functionality. These features were examined using an ex vivo canine lumbar model. Nine NPPs were implanted in five spines and their visibility was assessed on radiography, computed tomography ...
Wang Yi-Xiang J - - 2012
OBJECTIVE: To determine the relative performance of T1rho and T2 relaxation times in disc degeneration assessment. METHODS: Lumbar sagittal MRI was performed at 3 T in 52 subjects. With a spin-lock frequency of 500 Hz, T1rho was measured using a rotary echo spin-lock pulse embedded in a three-dimensional (3D) balanced fast field ...
Teske W - - 2012
Free disc fragments end often up in the concavity of the anterior epidural space. This space consists of two compartments. The discrepancy between the impressive magnetic resonance imaging findings, clinical symptoms in patients and the problem of treatment options led us to the anatomical determination of anterior epidural space volumes. ...
Ichimura Shinya - - 2012
The drainage of the superficial middle cerebral vein (SMCV) is classified into four subtypes. The sphenobasal vein (SBV) drains from the SMCV to the pterygoid venous plexus at the temporal skull base. Epidural procedures in the standard anterior transpetrosal approach (ATPA) may damage the route of the SBV. We report ...
Nugent Allison C AC Experimental Therapeutics and Pathophysiology Branch, National Institute of Mental Health, National Institutes of Health, 10 Center Drive, Bethesda, MD 20892, USA. - - 2013
Multiple techniques exist for the automated segmentation of magnetic resonance images (MRIs). The validity of these techniques can be assessed by evaluating test-retest reliability, interscanner reliability, and consistency with manual segmentation. We evaluate these measures for the FSL/FIRST subcortical segmentation tool. We retrospectively analyzed 190 MRI scans from 87 subjects ...
Leckie Ashley E - - 2012
STRUCTURED ABSTRACT: Study Design: An in vitro biomechanical and imaging study generated from an in vivo porcine model of early stage degenerate disc disease was used to evaluate mechanical property restoration comparing 2 minimally invasive injection techniques.Objective: To evaluate the ability of an injectable hydrogel to restore the mechanical properties ...
Farghal Aser - - 2012
BackgroundSmall bowel peristalsis is a complex of many individual motion elements. Although each element of peristalsis can be measured there is no current global measure of peristalsis.PurposeTo examine the feasibility of automated computerized assessment of global small bowel motility using simple computational methods.Material and MethodsCoronal dynamic MR images were obtained ...
Singh Harmandeep - - 2012
ABSTRACT: Ectopic thoracic kidney is a very rare congenital defect and is usually diagnosed incidentally. Tc-dimercaptosuccinic acid SPECT-CT images of a 7-year-old boy with left ectopic thoracic kidney are presented here.
Streubel Robert - - 2012
Modification of the curvature in magnetic nanostructures is a novel and elegant way towards tailoring physical phenomena at the nanoscale, allowing to overcome limitations apparent in planar counterparts. Here, we address curvature-driven changes of static magnetic properties in cylindrically curved magnetic segments with different radius of curvature. The curved architectures ...
Gupta Pooja - - 2012
Placenta percreta (PP) is a rare condition and usually presents with postpartum hemorrhage. A 35-year-old woman with 15-weeks pregnancy presented with clot retention. She was diagnosed with PP that was invading the posterior bladder wall. The computed tomography (CT) scan and operative images are presented. She was managed by hysterectomy ...
Yildirim Duzgun - - 2012
PURPOSE: The aim of this study was to present the effect of the peristaltic segment sign for the differential diagnosis between malignant, physiological and gastrointestinal focal fluorodeoxyglucose (FDG) uptakes as an alternative method to maximum standardized uptake value (SUVmax). MATERIALS AND METHODS: Gastrointestinal tract (GIT) sections of 823 FDG positron ...
Sillanpää N - - 2012
BACKGROUND AND PURPOSE:The location of the clot is a major determinant of ischemic stroke outcome. We studied the impact of the location (ICA, proximal M1 segment of the MCA, distal M1 segment, and M2 segment and more distally) of the clot on the CT perfusion parametric maps, the mismatch ratio, ...
Vaccaro Alexander R - - 2012
Intra-abdominal vascular injuries are rare during posterior lumbar spinal surgery, but they can result in major morbidity or mortality when they do occur. We are aware of no prior studies that have used prone patient positioning during magnetic resonance imaging for the purpose of characterizing the retroperitoneal iliac vasculature with ...
Liu Limei - - 2012
Splitting a magnetic resonance imaging (MRI) magnet into two halves can provide a central region to accommodate other modalities, such as positron emission tomography (PET). This approach, however, produces challenges in the design of the gradient coils in terms of gradient performance and fabrication. In this paper, the impact of ...
Li D - - 2012
Purpose: In order to achieve tumor positioning for radiotherapy planning automatically and accurately, an efficient tumor positioning method is proposed by jointly registration and segmentation for 18F-FDG PET-CT scans. Methods: At the first stage, the tumor is segmented from PET scans by region growing using the manual seeds which employs ...
Pepe Pietro - - 2012
A 51-year-old man presented at our department 2 days after the onset of a painful mass in the perineum and dysuria. Diagnosis of partial priapism secondary to proximal segmental corpora cavernosa thrombosis was made through colordoppler ultrasound (CDU) and magnetic resonance imaging (MRI). Treatment consisted of administration of systemic anticoagulation ...
Knafo S Emmanuelle - - 2012
A 23-yr-old black bear (Ursus americanus) was examined because of paralysis of unknown duration. The precise onset of clinical signs was unknown as a result of seasonal torpor. The bear was immobilized and transported to a university veterinary teaching hospital for further evaluation and treatment. Radiography revealed increased mineral opacity ...
Sugimoto Naruto - - 2012
Radiation doses in paediatric computed tomography (CT) were investigated for various types of recent CT scanners with newborn and 6-y-old phantoms in which silicon-photodiode dosemeters were implanted at various organ positions. In the head, chest and abdominal CT for the newborn phantom, doses for organs within the scan region were ...
Cyril Chivot - - 2012
Dural arteriovenous fistula (DAVF) of the anterior condylar canal is a rare subgroup of posterior fossa DAVF. Successful treatment of this DAVF requires an accurate image diagnosis and the knowledge of the anatomy of the anterior condylar confluent. We present the imaging features of angiography and MR angiography of a ...
Yokota Hiroshi - - 2012
We report the clinical significance of anterior cerebral artery (ACA) notching on the optic nerve and chiasm in a 3.5-year-old girl with a craniopharyngioma and progressive blindness. She presented with a headache and vomiting, followed by binocular blindness. Magnetic resonance imaging (MRI) studies demonstrated severely distended A1 segments and ill-depicted ...
Yovel Oren S - - 2012
ABSTRACT:: A 49-year-old woman with painless reduction in visual acuity in her left eye was found to have nonarteritic anterior ischemic optic neuropathy (NAION). Fluorescein angiography revealed optic disc capillary leakage consistent with "luxury perfusion." Contrast-enhanced FLAIR magnetic resonance imaging (MRI) showed marked enhancement of the left optic disc. Resolution ...
Norris Francesca C FC Centre for Advanced Biomedical Imaging, Department of Medicine and UCL Institute of Child Health, University College London, London, United Kingdom. - - 2013
Effective methods for high-throughput screening and morphometric analysis are crucial for phenotyping the increasing number of mouse mutants that are being generated. Automated segmentation propagation for embryo phenotyping is an emerging application that enables noninvasive and rapid quantification of substructure volumetric data for morphometric analysis. We present a study to ...
Clark Robert A RA Department of Ophthalmology, University of California, Los Angeles, CA 90095-7002, - - 2012
The lateral rectus (LR) and medial rectus (MR) extraocular muscles (EOMs) have largely nonoverlapping superior and inferior innervation territories, suggesting functional compartmental specialization. We used magnetic resonance imaging (MRI) in humans to investigate differential compartmental activity in the rectus EOMs during head tilt, which evokes ocular counter-rolling, a torsional vestibulo-ocular ...
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