Search Results
Results 1 - 50 of 1205
1 2 3 4 5 6 7 8 9 10 >
Lee Yedaun Y Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea Department of Radiology, Inje University College of Medicine, Haeundae Paik Hospital, Busan, Republic of - - 2014
Gd-EOB-DTPA-enhanced magnetic resonance (MR) could be used for preoperative evaluation of bile duct anatomy in addition to conventional information of focal hepatic lesions. To evaluate accuracy of contrast-enhanced MR cholangiography (CE MRC) reconstructed from Gd-EOB-DTPA-enhanced MR images for depicting biliary anatomy with intraoperative cholangiography. We retrospectively identified 71 patients who ...
Yeo Sin Yuin SY Department of Biomedical Engineering, Biomedical NMR, Eindhoven University of Technology, Eindhoven, The Netherlands; Center for Imaging Research and Education (CIRE), Eindhoven, The - - 2014
Temperature-sensitive liposomes (TSLs) loaded with doxorubicin (Dox), and Magnetic Resonance Imaging contrast agents (CAs), either manganese (Mn(2+)) or [Gd(HPDO3A)(H2O)], provide the advantage of drug delivery under MR image guidance. Encapsulated MRI CAs have low longitudinal relaxivity (r1) due to limited transmembrane water exchange. Upon triggered released at hyperthermic temperature, the ...
Abele T A TA From the Departments of Radiology (T.A.A., E.P.Q., H.R.H., R.H.W.), Biomedical Informatics (R.H.W.), and Division of Otolaryngology-Head and Neck Surgery (R.K.G., C.S., R.H.W.), University of Utah, Salt Lake City, Utah; and Department of Radiology (D.A.B.), Naval Medical Center Portsmouth, Portsmouth, Virginia. - - 2014
While enhanced T1WI is considered the "gold standard" for detection of internal auditory canal pathology, unenhanced fluid-sensitive sequences have shown high sensitivity for lesion identification. Our purpose was to evaluate the diagnostic accuracy of an unenhanced MR imaging protocol using axial CISS and coronal T2WI for detection of small (10 ...
Jakubovic R R Department of Medical Imaging, Division of Neuroradiology, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada; Department of Biomedical Physics, Ryerson University, Toronto, Ontario, - - 2014
To investigate whether early relative cerebral blood volume (rCBV), relative cerebral blood flow (rCBF) and permeability (Ktrans(2)) measurements may serve as magnetic resonance imaging (MRI) biomarkers of radiation response or progression for brain metastases. Seventy brain metastases in 44 patients treated with either stereotactic radiosurgery or whole brain radiotherapy were ...
O'Neill Ailbhe C AC Cardiac CT/MRI Program, Department of Radiology, St. Vincent's University Hospital, Dublin, - - 2014
Paravalvular leaks are an uncommon but serious complication of prosthetic valves. Transthoracic echocardiography is used in the assessment of prosthetic valves but can be limited by acoustic shadowing from the prosthesis and poor acoustic windowing. Small case series have previously shown cardiac CT to have promising results in detecting paravalvular ...
Kunst Chelsea M CM California Veterinary Specialists, Murrieta, CA, - - 2014
Elbow dysplasia is a heritable disease that is a common cause of lameness and progressive elbow osteoarthritis in young large breed dogs. The Orthopedic Foundation for Animals (OFA) screens elbow radiographs, and assigns grades 0-3 based on presence and severity of bony proliferation on the anconeal process. Grade 1 is ...
Otallah Scott S From the Department of Neurology (S.O.), University of Virginia Health System, Charlottesville; and the Departments of Radiology and Medical Imaging (J.A.M.) and Neurology and Pediatrics (H.P.G.), University of Virginia, - - 2014
A boy was diagnosed at age 10 months with megalencephalic leukoencephalopathy with subcortical cysts (MLC) based on progressive macrocephaly and characteristic MRI findings (figure, A-C).(1) Over subsequent years, initial motor delays resolved and neurobehavioral difficulties were mild. On repeat MRI at 6 years (figure, D-F), only small areas of frontal ...
Jordan Justin T JT From the Division of Neuro-Oncology (J.T.J., S.R.P.), Department of Neurology (H.-S.Y., D.N.), Massachusetts General Hospital, - - 2014
A 30-year-old man presented with weeks of progressive headaches, imbalance, and aphasia. Brain MRI revealed an enhancing left frontal mass (figure 1, A and B). Chest imaging revealed mediastinal and hilar adenopathy (figure 1, C and D). Metastatic cancer was initially suspected, but pulmonary lymph node aspiration revealed sarcoidosis (figure ...
Fu Yingli Y From the Division of MR Research, Russell H. Morgan Department of Radiology and Radiological Science (Y.F., C.R.W., J.W.M.B., M.S., D.L.K.), Department of Molecular and Comparative Pathobiology (N.A., K.G., D.L.K.), Institute for Cell Engineering (J.W.M.B.), and Division of Cardiology, Department of Internal Medicine (P.V.J.), The Johns Hopkins University School of Medicine, 600 N Wolfe St, 314 Park Bldg, Baltimore, MD 21087; and Department of Corporate Technology, Siemens Corporation, Baltimore, Md (T.E., A.F., - - 2014
Purpose To assess intrapericardial delivery of microencapsulated, xenogeneic human mesenchymal stem cells (hMSCs) by using x-ray fused with magnetic resonance (MR) imaging (x-ray/MR imaging) guidance as a potential treatment for ischemic cardiovascular disease in an immunocompetent swine model. Materials and Methods All animal experiments were approved by the institutional animal ...
Baker Justin J JJ Division of Surgical Oncology and Endocrine Surgery and The Lineberger Comprehensive Cancer Center, Department of Surgery, University of North Carolina at Chapel Hill, Campus Box 7213, 170 Manning Drive, 1150 POB, Chapel Hill, NC 27599, - - 2014
Follow-up of patients with sentinel lymph node-positive stage III melanoma uses history, physical exam, and cross-sectional imaging. The aim of this study was to evaluate positron emission tomographic (PET)/computed tomographic (CT) scans in the detection of recurrence. From 2003 to 2009, a single-institution prospective database of all cutaneous melanoma patients ...
Zhou Dayong D 1 Imaging Institute, Section of Interventional Radiology, Cleveland Clinic, 9500 Euclid Ave, Cleveland, OH - - 2014
OBJECTIVE. The purpose of this study is to retrospectively evaluate the prevalence and extent of Celect inferior vena cava (IVC) filter penetration. MATERIALS AND METHODS. All patients with Celect filters who underwent CT between 2007 and 2012 were assessed for penetration and related complications. RESULTS. Of the 690 patients with ...
Xing Huaiyong H State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics Chinese Academy of Sciences, Shanghai, 200050, P.R. - - 2014
Herein, ultrasmall NaGdF4 nanodots (~2 nm) with DTPA conjugation have been synthesized for efficient MR angiography. Impressively, the r1 value in MRI reaches up to 8.93 mM(-1) ·s(-1) . The ultrasmall vessel lumen of a rabbit is lighted up remarkably. After 3 h, atherosclerotic plaques could be discriminated clearly. This ...
Swenson David W DW Alpert Medical School of Brown University, Department of Diagnostic Imaging, Rhode Island Hospital, 593 Eddy Street, Providence, RI 02903, United States. Electronic address: - - 2014
Evaluate the sensitivity and specificity of pelvic ultrasound (US) and abdominopelvic computed tomography (CT) for the identification of ovarian torsion in women presenting to the emergency department with acute lower abdominal or pelvic pain. This is a retrospective study of 20 cases of ovarian torsion and 20 control patients, all ...
Yang Wan'an W School of Computer and Information Engineering, Yibin University, Yibin, People's Republic of - - 2014
To control and drive a robotic capsule accurately from outside a patient's body, we present a schema in which the capsule enclosing the imaging device, circuits, batteries, etc is looped by a permanent magnet ring that acts as an actuator. A cuboidal permanent magnet situated outside the patient's body attracts ...
Luttje Mariska P MP Imaging Division, University Medical Center, Utrecht, - - 2013
Improved diagnostic sensitivity could be obtained in cancer detection and staging when individual compounds of the choline pool can be detected. Therefore, a novel coil design is proposed, providing the ability to acquire both (1) H and (31) P magnetic resonance spectroscopic imaging (MRSI) in patients with prostate cancer. A ...
Panfili Elisabetta - - 2013
The purpose of the study was to compare the artefacts produced by different hip prostheses on magnetic resonance imaging (MRI). An identical MRI protocol was used to perform a quali-quantitative in vitro evaluation of artefacts caused by different hip prosthetic materials at different field strengths: prosthesis number 1, composed of ...
Ruiz Ana A APHP, Service de radiologie, Hôpital Saint Antoine, Paris, France and Université Pierre et Marie Curie (UPMC, Paris VI), Paris, - - 2014
Magnetic resonance imaging (MRI) with magnetic resonance cholangiography (MRC) has become the radiologic standard of reference for diagnosis of primary sclerosing cholangitis (PSC). However, natural history of radiologic features of PSC is poorly known. In the current study, we aimed at analyzing the course of PSC using three-dimensional (3D) MRC ...
Su Tzu-Pei - - 2013
We report the findings of a Meckel scan in a 19-year-old patient treated for retroperitoneal teratoma with intermittent tarry stool for 1 month. Two focal stases of radioactivity in the right upper quadrant of the abdomen were noted. SPECT/CT for localization revealed that these 2 foci were within the displaced ...
Zuo Tao T Department of Thoracic Surgery, Wuhan Medical Treatment Center, Wuhan, - - 2014
Intrathoracic meningocele associated with neurofibromatosis type 1 is quite rare. We report the case of a Chinese women with a 20-day history of right-sided chest pain and sense of pressure on the chest. Computed tomography and magnetic resonance imaging indicated a homogeneous thin-walled cystic mass in the right rear mediastinum, ...
Edjlali Myriam - - 2013
Purpose:To assess the feasibility of a selective flow-tracking cartographic procedure applied to four-dimensional (4D) flow imaging and to demonstrate its usefulness in the characterization of dural arteriovenous fistulas (DAVFs).Materials and Methods:Institutional review board approval was obtained, and all patients provided written informed consent. Eight patients (nine DAVFs) underwent 3.0-T magnetic ...
Supakul Nucharin - - 2013
OBJECTIVE. The purpose of this article is to summarize our experience with the use of ultrasound for evaluation of costochondral cartilage deformity in patients presenting with an anterior chest wall mass. MATERIALS AND METHODS. From 2007 to 2012, we identified all patients at our tertiary care children's hospital younger than ...
Li Ye Y Department of Radiology and Biomedical Imaging, UC San Francisco, San Francisco, CA, - - 2013
Radiofrequency (RF) field (B 1) inhomogeneity due to shortened wavelength at high field is a major cause of magnetic resonance imaging (MRI) nonuniformity in high dielectric biological samples (e.g., human body). In this work, we propose a method to improve the B 1 and MRI homogeneity by using pre-emphasized non-uniform ...
Wimmer Thomas - - 2013
To investigate the reliability of simulations for planning pancreatic irreversible electroporation (IRE) ablations compared with computed tomography (CT) and pathology outcomes in an animal model. Simulations were performed varying treatment parameters, including field strength (1.5-2.5 kV/cm), pulse number (70-90 pulses), and pulse length (70-100 µs). Pancreatic IRE was performed in ...
Placidi Matteo P - - 2013
A series of low molecular weight lanthanide complexes were developed that have high (1) H longitudinal relaxivities (r1 ) and the potential to be used as dual frequency (1) H and (19) F MR probes. Their behavior was investigated in more detail through relaxometry, pH-potentiometry, luminescence, and multinuclear NMR spectroscopy. Fitting ...
Briganti F - - 2013
We describe a 62-year-old woman who presented with a history of ataxia, dizziness and urinary urgency. Neurological examination disclosed a positive Romberg sign, ataxia and postural instability. A magnetic resonance imaging (MRI) scan showed Chiari type 1 malformation (CM1). Forty-eight months later, the patient was clinically improved and underwent a ...
Hahn Barry - - 2013
Computed tomographic (CT) scanning is increasingly prevalent in emergency departments (EDs). It is a moderate- to high-radiation diagnostic technique that exposes more than 1 million children per year to unnecessary radiation. Repeat CT of the abdomen and pelvis (CTAP) among pediatric patients who return to the ED within 1 year ...
Dong Suzhen - - 2013
BACKGROUND: The cardiovascular system is the part of the fetal anatomy that most frequently suffers from congenital pathology. This study shows our preliminary experience with fetal cardiovascular magnetic resonance (CMR) to evaluate congenital cardiovascular abnormalities. METHODS: Between January 2006 and June 2011, Prenatal routine obstetric ultrasound (US), echocardiography and CMR ...
Cox Sharon G - - 2013
Magnetic resonance imaging (MRI) has become the principal tool for Wilms tumor (WT) assessment and follow-up. MRI and histopathologic findings were not congruent in 2 of the q30 scanned patients with renal masses (2008 to 2011). Three lesions thought to be WT on MRI were found to be a sclerotic ...
Ruan Leilei L Department of Plant, Soil and Microbial Sciences, Michigan State University, Hickory Corners, MI 49060, USA. - - 2013
Around 4.4 million ha of land in USDA Conservation Reserve Program (CRP) contracts will expire between 2013 and 2018 and some will likely return to crop production. No-till (NT) management offers the potential to reduce the global warming costs of CO2 , CH4 , and N2 O emissions during CRP conversion, ...
Yang Chengliang C Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, Wisconsin; Henan Cancer Hospital, Zhengzhou University, Zhengzhou, - - 2014
The purpose of this work is to explore a new adaptive radiation therapy (ART) strategy, combined "online and offline" ART, that can fully account for interfraction variations similar to the existing online ART but with substantially reduced online effort. The concept for the combined ART is to perform online ART ...
Bruckman Michael A - - 2013
To compensate for the low sensitivity of magnetic resonance imaging (MRI), nanoparticles have been developed to deliver high payloads of contrast agents to sites of disease. Here, we report the development of supramolecular MRI contrast agents using the plant viral nanoparticle tobacco mosaic virus (TMV). Rod-shaped TMV nanoparticles measuring 300×18 ...
el Barzouhi Abdelilah - - 2013
Magnetic resonance imaging (MRI) is frequently performed during follow-up in patients with known lumbar-disk herniation and persistent symptoms of sciatica. The association between findings on MRI and clinical outcome is controversial. We studied 283 patients in a randomized trial comparing surgery and prolonged conservative care for sciatica and lumbar-disk herniation. ...
Vassiou Katerina - - 2013
BackgroundAssessment of breast lesions with magnetic resonance imaging (MRI) provides a means for lesion detection and diagnosis. Proton (hydrogen-1) magnetic resonance spectroscopy ((1)H-MRS) has been proposed as a useful diagnostic technique in providing metabolic information of suspicious breast lesions.PurposeTo determine the clinical significance of in-vivo single voxel (1)H-MRS at 3T ...
Trop Isabelle - - 2013
Purpose:To evaluate and compare B(1) homogeneity for breast magnetic resonance (MR) imaging performed at 3 T with dual-source radiofrequency (RF) transmission to 1.5-T MR imaging and 3-T MR imaging with quadrature transmission.Materials and Methods:This prospective study received institutional review board approval and patients provided informed consent. Women (n = 25; ...
Kaushik Jaya Shankar - - 2012
A 6-year-old boy presented with weakness of the right upper and lower limbs, noted since infancy. Magnetic resonance imaging of the brain revealed periventricular nodular heterotopia lining the trigone and occipital horns of bilateral lateral ventricles along with herniation of the cerebellar tonsils below the foramen magnum suggestive of Chiari ...
Rodgers Christopher T - - 2012
At clinical MRI field strengths (1.5 and 3 T), quantitative maps of the longitudinal relaxation time T(1) of the myocardium reveal diseased tissue without requiring contrast agents. Cardiac T(1) maps can be measured by Look-Locker inversion recovery sequences such as ShMOLLI at 1.5 and 3 T. Cardiovascular MRI at a ...
Gass Achim - - 2012
In MS, gray and white matter that appear normal on conventional MRI may be affected, even in early phases of the disease.(1) This has been ascertained with techniques such as proton magnetic resonance spectroscopy ((1)H-MRS), which has the specificity to detect and differentiate between neuronal and glial abnormalities in the ...
Jung Ki-Hye KH Department of Applied Chemistry, Department of Medical & Biological Engineering, and Department of Chemistry, Kyungpook National University , University Road 80, Daegu, 702-701, - - 2012
We report the synthesis of DO3A derivatives of 2,2'-diaminobiphenyl (1a,b) and their Gd complexes of the type [Gd(1)(H2O)]·xH2O (2a,b) for use as new MRI blood-pool contrast agents (BPCAs) that provide strong and prolonged vascular enhancement. Pharmacokinetic inertness of 2 compares well with that of structurally related Dotarem, a DOTA-based MRI ...
Figueiredo Paula - - 2012
PURPOSE: In healthy subjects, the self-selected walking speed (SSWS) corresponds to the lowest cost of transport (CT). This study tested the hypothesis that SSWS could be determined by the work of breathing instead of the CT in patients with chronic heart failure (CHF). METHODS: Seventeen patients with CHF due to ...
Karthikesalingam A A Department of Outcomes Research, St George's Vascular Institute, St George's Hospital, London, UK. - - 2012
Previous analyses suggested that duplex ultrasonography (DUS) detected endoleaks after endovascular aneurysm repair (EVAR) with insufficient sensitivity; they did not specifically examine types 1 and 3 endoleak, which, if untreated, may lead to aneurysm-related death. In light of changes to clinical practice, the diagnostic accuracy of DUS and contrast-enhanced ultrasonography ...
Fabich Hilary T - - 2012
Advanced magnetic resonance (MR) relaxation and diffusion correlation measurements and imaging provide a means to non-invasively monitor gelation for biotechnology applications. In this study, MR is used to characterize physical gelation of three alginates with distinct chemical structures; an algal alginate, which is not O-acetylated but contains poly guluronate (G) ...
Bailey Mark J - - 2012
Configuring RE(2) O(3) nanocrystals with pseudo-2D morphologies confers substantive gains in relaxivities over equivalent spherical counterparts. The most promising arises from Gd(2) O(3) whose ionic transverse and longitudinal relaxivities were as high as r(1) = 12.7 mM(-1) s(-1) and r(2) = 17.2 mM(-1) s(-1) (dispersed in H(2) O, T = ...
Brédart Anne - - 2011
OBJECTIVE: Intensive surveillance in women at breast cancer risk is currently investigated in a French prospective, non-randomized, multicenter study, in which standard imaging - mammography±ultrasound ('Mx') and standard imaging combined with magnetic resonance imaging ('MRI') are compared with regard to perception of care and examination experience. METHODS: 1561 women were ...
Vegar-Zubovic Sandra - - 2011
The aim of the study was to determine the potential of magnetic resonance urography (MRU) in evaluation of paediatric urinary tract pathologies. PATIENTS AND METHODS.: Twenty-one paediatric urological patients were evaluated with T1, T2 prior and after and 3D gradient echo sequences after the contrast administration. Results were compared with ...
Pifarré P - - 2011
Cancer is one of the main health problems in western countries. In 2008, it represented the first cause of death in men and the second one in women. When there is a diagnosis or suspicion of cancer, performing diagnostic imaging studies has an important role in the clinical activity and ...
Kurzepa J - - 2011
Kurzepa J, Bielewicz J, Czekajska-Chehab E, Kurzepa J, Bartosik-Psujek H, Grabarska A, Stelmasiak Z. CT volume/density ratio as the marker of ischaemic brain injury. Acta Neurol Scand: 2011: 123: 310-315. © 2010 John Wiley & Sons A/S. Objectives -  We believe that the CT volume/density ratio (VDR) of infarcted area reflects ...
Teo Lynette L S - - 2011
Coarctation of the aorta (CoA) is a common congenital defect whose overall incidence is 5-8% of all congenital cardiac anomalies. Associated cardiac anomalies have been well described in previous studies examining specific subgroups of CoA patients, particularly infants and necropsy specimens. The majority of studies, conducted from the 1970s to ...
Purroy F - - 2011
diffusion-weighted magnetic resonance imaging (DWI) is a sensitive diagnostic tool for detecting acute ischaemic lesions in patients with transient ischaemic attacks (TIAs). The additional predictive value of DWI lesion patterns is not well known. two hundred and fifty-four consecutive patients with TIA underwent DWI within 7 days of symptom onset. ...
Chen Albert P - - 2010
Reporter-based cell detection and localization in vivo may become an important imaging tool with the emergence of cellular therapy. With the strong signal enhancement provided by dynamic nuclear polarization, an NMR-based reporter probe system utilizing specific enzyme expression and activity can potentially provide stable, high-resolution visualization of the cells of ...
Doubal Fergus N - - 2010
Cerebral small vessel disease (lacunar stroke and cerebral white matter hyperintensities) is caused by vessel abnormalities of unknown aetiology. Retinal vessels show developmental and pathophysiological similarities to cerebral small vessels and microvessel geometry may influence vascular efficiency. Retinal arteriolar branching angles or coefficients (the ratio of the sum of the ...
1 2 3 4 5 6 7 8 9 10 >