keyword
MENU ▼
Read by QxMD icon Read
search

Gadolinium Brain

keyword
https://www.readbyqxmd.com/read/27919497/comparative-efficacy-and-discontinuation-of-dimethyl-fumarate-and-fingolimod-in-clinical-practice-at-12-month-follow-up
#1
Carrie M Hersh, Thomas E Love, Samuel Cohn, Claire Hara-Cleaver, Robert A Bermel, Robert J Fox, Jeffrey A Cohen, Daniel Ontaneda
BACKGROUND: Dimethyl fumarate (DMF) and fingolimod (FTY) are approved oral disease modifying therapies (DMT) for relapsing multiple sclerosis (MS). Phase 3 trials established these agents as effective and generally well tolerated, though comparative efficacy and discontinuation remain unknown. OBJECTIVE: To assess real-world efficacy and discontinuation of DMF and FTY over 12 months in patients with MS. METHODS: We identified 458 DMF-treated and 317 FTY-treated patients in a large academic MS center...
November 2016: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/27918139/an-observational-study-to-assess-brain-mri-change-and-disease-progression-in-multiple-sclerosis-clinical-practice-the-ms-mrius-study
#2
Robert Zivadinov, Nasreen Khan, Jennie Medin, Pia Christoffersen, Jennifer Price, Jonathan R Korn, Ian Bonzani, Michael G Dwyer, Niels Bergsland, Ellen Carl, Diego Silva, Bianca Weinstock-Guttman
BACKGROUND & PURPOSE: To describe methodology, interim baseline, and longitudinal magnetic resonance imaging (MRI) acquisition parameter characteristics of the multiple sclerosis clinical outcome and MRI in the United States (MS-MRIUS). MATERIAL & METHODS: The MS-MRIUS is an ongoing longitudinal and retrospective study of MS patients on fingolimod. Clinical and brain MRI image scan data were collected from 600 patients across 33 MS centers in the United States. MRI brain outcomes included change in whole-brain volume, lateral ventricle volume, T2- and T1-lesion volumes, and new/enlarging T2 and gadolinium-enhancing lesions...
December 5, 2016: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/27916758/-hydrocephalus-mimicking-idiopathic-normal-pressure-hydrocephalus-as-the-first-manifestation-of-neurosarcoidosis
#3
Atsuhiko Sugiyama, Makoto Kobayashi, Kumiko Agatsuma, Takeshi Bo, Toshiaki Shiojiri, Hidetoshi Mochida, Yoshio Suzuki, Takashi Matsunaga, Satoshi Kuwabara
A 61-year-old woman presented with a 10-month history of gait disturbance and a 7-month history of urinary incontinence. The Hasegawa dementia scale-revised score indicated cognitive impairment. Brain magnetic resonance imaging (MRI) indicated hydrocephalus with disproportionately enlarged subarachnoid space. This is usually considered a characteristic finding in idiopathic normal pressure hydrocephalus (iNPH). Ventriculo-peritoneal shunting improved the patient's symptoms. Neurosarcoidosis was suspected as a cause of the hydrocephalus because of the abnormalities in the cerebrospinal fluid and the abnormal enhancement of the cauda equina, the leptomeninges of the brainstem, and the spinal cord, as seen on MRI with gadolinium enhancement...
December 2016: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/27916657/pharmacokinetic-analysis-and-drug-delivery-efficiency-of-the-focused-ultrasound-induced-blood-brain-barrier-opening-in-non-human-primates
#4
Gesthimani Samiotaki, Maria Eleni Karakatsani, Amanda Buch, Stephanos Papadopoulos, Shih Ying Wu, Sachin Jambawalikar, Elisa E Konofagou
PURPOSE: Focused Ultrasound (FUS) in conjunction with systemically administered microbubbles has been shown to open the Blood-Brain Barrier (BBB) locally, non-invasively and reversibly in rodents and non-human primates (NHP), suggesting the immense potential of this technique. The objective of this study entailed the investigation of the physiologic changes in the brain following the FUS-induced BBB opening and their relationship with the underlying anatomy. MATERIALS AND METHODS: Pharmacokinetic analysis was implemented in NHP's that received FUS at various acoustic pressures...
December 1, 2016: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/27911291/a-metal-free-method-for-producing-mri-contrast-at-amyloid-%C3%AE
#5
Silvia Hilt, Tang Tang, Jeffrey H Walton, Madhu Budamagunta, Izumi Maezawa, Tamás Kálai, Kálmán Hideg, Vikrant Singh, Heike Wulff, Qizhi Gong, Lee-Way Jin, Angelique Louie, John C Voss
Alzheimer's disease (AD) is characterized by depositions of the amyloid-β (Aβ) peptide in the brain. The disease process develops over decades, with substantial neurological loss occurring before a clinical diagnosis of dementia can be rendered. It is therefore imperative to develop methods that permit early detection and monitoring of disease progression. In addition, the multifactorial pathogenesis of AD has identified several potential avenues for AD intervention. Thus, evaluation of therapeutic candidates over lengthy trial periods also demands a practical, noninvasive method for measuring Aβ in the brain...
November 26, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27906525/the-clinical-utility-of-qsm-disease-diagnosis-medical-management-and-surgical-planning
#6
REVIEW
Sarah Eskreis-Winkler, Yan Zhang, Jingwei Zhang, Zhe Liu, Alexey Dimov, Ajay Gupta, Yi Wang
Quantitative susceptibility mapping (QSM) is an MR technique that depicts and quantifies magnetic susceptibility sources. Mapping iron, the dominant susceptibility source in the brain, has many important clinical applications. Herein, we review QSM applications in the diagnosis, medical management, and surgical treatment of disease. To assist in early disease diagnosis, QSM can identify elevated iron levels in the motor cortex of amyotrophic lateral sclerosis patients, in the substantia nigra of Parkinson's disease (PD) patients, in the globus pallidus, putamen, and caudate of Huntington's disease patients, and in the basal ganglia of Wilson's disease patients...
December 1, 2016: NMR in Biomedicine
https://www.readbyqxmd.com/read/27888416/lesion-remyelinating-activity-of-gsk239512-versus-placebo-in-patients-with-relapsing-remitting-multiple-sclerosis-a-randomised-single-blind-phase-ii-study
#7
Caryl J Schwartzbach, Richard A Grove, Robert Brown, Debra Tompson, Florian Then Bergh, Douglas L Arnold
Histamine H3 receptor blockade may enhance lesion remyelination in multiple sclerosis (MS). The efficacy (using a magnetic resonance imaging marker of myelination, magnetisation transfer ratio [MTR]), safety and pharmacokinetics of GSK239512, a potent and brain penetrant H3 receptor antagonist/inverse agonist on lesion remyelination in relapsing-remitting MS (RRMS) were assessed. This was a phase II, randomised, parallel-group, placebo-controlled, double-blind (sponsor-unblinded), international, multicentre study (NCT01772199)...
November 25, 2016: Journal of Neurology
https://www.readbyqxmd.com/read/27853267/characterizing-focused-ultrasound-mediated-drug-delivery-to-the-heterogeneous-primate-brain-in-vivo-with-acoustic-monitoring
#8
Shih-Ying Wu, Carlos Sierra Sanchez, Gesthimani Samiotaki, Amanda Buch, Vincent P Ferrera, Elisa E Konofagou
Focused ultrasound with microbubbles has been used to noninvasively and selectively deliver pharmacological agents across the blood-brain barrier (BBB) for treating brain diseases. Acoustic cavitation monitoring could serve as an on-line tool to assess and control the treatment. While it demonstrated a strong correlation in small animals, its translation to primates remains in question due to the anatomically different and highly heterogeneous brain structures with gray and white matteras well as dense vasculature...
November 17, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27847726/neuromyelitis-optica-masquerading-as-lumbosacral-radiculopathy-a-case-report
#9
Seungyeon Kim, Bumsun Kwon, Jinwoo Park, Hojun Lee, Hyojun Kim, Dayun Park, Kiyeun Nam
Neuromyelitis optica spectrum disorders (NMOSD) is a demyelinating syndrome of the central nervous system. This case report describes a 31-year-old woman whose electromyography revealed radiculopathy in the left L5-S1 spinal segment without anatomical abnormalities on lumbosacral magnetic resonance imaging (MRI). She was diagnosed with NMOSD based on gadolinium contrast whole spine and brain MRI and anti-aquaporin-4 antibody findings. Her peripheral nervous system might have been damaged during the early course of NMOSD...
October 2016: Annals of Rehabilitation Medicine
https://www.readbyqxmd.com/read/27845277/gadolinium-accumulation-in-organs-of-sprague-dawley-%C3%A2-rats-after-implantation-of-a-biodegradable-magnesium-gadolinium-alloy
#10
Anastasia Myrissa, Simone Braeuer, Elisabeth Martinelli, Regine Willumeit-Römer, Walter Goessler, Annelie Martina Weinberg
Biodegradable magnesium implants are under investigation because of their promising properties as medical devices. For enhancing the mechanical properties and the degradation resistance, rare earth elements are often used as alloying elements. In this study Mg10Gd pins were implanted into Sprague-Dawley(®) rats. The pin volume loss and a possible accumulation of magnesium and gadolinium in the rats' organs and blood were investigated in a long-term study over 36 weeks. The results showed that Mg10Gd is a fast disintegrating material...
November 11, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27834725/do-gadolinium-based-contrast-agents-affect-the-18f-fdg-pet-ct-uptake-in-the-dentate-nucleus-and-the-globus-pallidus-a-pilot-study
#11
Kyle Bauer, Alaina Lathrum, Osama Raslan, Patrick Kelly, Yihua Zhou, Debra Hewing, Crystal Botkin, James Turner, Medhat M Osman
OBJECTIVES: Gadolinium (Gd) is toxic and to avoid its deposition in the tissues, it must be chemically bonded with nonmetal ions to facilitate its excretion by the kidneys. High signal intensity in the dentate nucleus (DN) and globus pallidus (GP) on unenhanced T1-weighted MR images has been both morphologically and pathologically linked to gadolinium-based contrast agent (GBCA) retention in the brain. The purpose of this study is to determine if repeated administrations of GBCA would affect the uptake of (18)F-FDG in the DN and GP on PET/CT...
November 10, 2016: Journal of Nuclear Medicine Technology
https://www.readbyqxmd.com/read/27833932/targeted-treatment-of-brainstem-neurohistiocytosis-guided-by-urinary-cell-free-dna
#12
David Hunt, Paul Milne, Peter Fernandes, Venetia Bigley, Matthew Collin
OBJECTIVE: To identify a treatment-responsive BRAF(V600E) mutation in brainstem neurohistiocytosis, where no lesional tissue was readily obtainable, using a cell-free DNA approach. METHODS: Cell-free DNA was extracted from urine and allele-specific PCR for the BRAF(V600E) mutation was performed. Response to conventional treatment (corticosteroids and interferon) and targeted treatment with a BRAF inhibitor was assessed by clinical evaluation, gadolinium-enhanced MRI brain scan, and serial testing of urinary cell-free DNA for mutant alleles...
January 2017: Neurology® Neuroimmunology & Neuroinflammation
https://www.readbyqxmd.com/read/27832312/penetration-and-distribution-of-gadolinium-based-contrast-agents-into-the-cerebrospinal-fluid-in-healthy-rats-a-potential-pathway-of-entry-into-the-brain-tissue
#13
Gregor Jost, Thomas Frenzel, Jessica Lohrke, Diana Constanze Lenhard, Shinji Naganawa, Hubertus Pietsch
OBJECTIVE: Signal hyperintensity on unenhanced MRI in certain brain regions has been reported after multiple administrations of some, but not all, gadolinium-based contrast agents (GBCAs). One potential initial pathway of GBCA entry into the brain, infiltration from blood into the cerebrospinal fluid (CSF), was systematically evaluated in this preclinical study. METHODS: GBCA infiltration and distribution in the CSF were investigated in healthy rats using repeated fluid-attenuated MRI up to 4 h after high-dose (1...
November 10, 2016: European Radiology
https://www.readbyqxmd.com/read/27831901/imaging-matrix-metalloproteinase-activity-in-multiple-sclerosis-as-a-specific-marker-of-leukocyte-penetration-of-the-blood-brain-barrier
#14
Hanna Gerwien, Sven Hermann, Xueli Zhang, Eva Korpos, Jian Song, Klaus Kopka, Andreas Faust, Christian Wenning, Catharina C Gross, Lisa Honold, Nico Melzer, Ghislain Opdenakker, Heinz Wiendl, Michael Schäfers, Lydia Sorokin
The enzymes gelatinase A/matrix metalloproteinase-2 (MMP-2) and gelatinase B/MMP-9 are essential for induction of neuroinflammatory symptoms in experimental autoimmune encephalomyelitis (EAE), a mouse model of multiple sclerosis (MS); in the absence of these enzymes, the disease does not develop. We therefore investigated the cellular sources and relative contributions of MMP-2 and MMP-9 to disease at early stages of EAE induction. We demonstrated that MMP-9 from an immune cell source is required in EAE for initial infiltration of leukocytes into the central nervous system and that MMP-9 activity is a reliable marker of leukocyte penetration of the blood-brain barrier...
November 9, 2016: Science Translational Medicine
https://www.readbyqxmd.com/read/27829965/magnetic-resonance-imaging-characteristics-of-hyperacute-intracerebral-hemorrhage
#15
Sulaiman Iftikhar, Nicholas Rossi, Nitin Goyal, Nickalus Khan, Adam Arthur, Ramin Zand
BACKGROUND: Magnetic resonance imaging (MRI) of the brain is highly sensitive for detecting intracerebral hemorrhage (ICH). Understanding of the imaging characteristics of hyperacute ICH is limited secondary to availability and increased time to scan relative to other imaging modalities. OBJECTIVE: In this report, we present the MRI characteristics of two patients who developed ICH while on the MRI table. METHODS: A 44-year-old women presented with week-long headache associated with blurry vision and photophobia...
October 2016: Journal of Vascular and Interventional Neurology
https://www.readbyqxmd.com/read/27813364/magnetic-resonance-detected-myocardial-inflammation-and-fibrosis-in-rheumatoid-arthritis-associations-of-disease-characteristics-and-n-terminal-pro-brain-natriuretic-peptide-levels
#16
Hitomi Kobayshi, Yasuyuki Kobayashi, Isamu Yokoe, Yosikatsu Akashi, Masami Takei, Jon T Giles
Objective Myocardial dysfunction and heart failure (HF) are increased in rheumatoid arthritis (RA), yet there are few studies of the RA myocardium. Methods RA patients with no known heart disease or risk factors underwent gadolinium-enhanced cardiac magnetic resonance (cMR) imaging. Images were assessed for left-ventricular (LV) structure and functional parameters, and for myocardial late gadolinium enhancement (LGE: an indicator of myocardial fibrosis) and T2-weighted imaging (T2WI: an indicator of active inflammation)...
November 3, 2016: Arthritis Care & Research
https://www.readbyqxmd.com/read/27811339/leptomeningeal-contrast-enhancement-is-associated-with-progression-of-cortical-atrophy-in-ms-a-retrospective-pilot-observational-longitudinal-study
#17
Robert Zivadinov, Deepa P Ramasamy, Manuela Vaneckova, Sirin Gandhi, Avinash Chandra, Jesper Hagemeier, Niels Bergsland, Paul Polak, Ralph Hb Benedict, David Hojnacki, Bianca Weinstock-Guttman
BACKGROUND: Leptomeningeal contrast enhancement (LM CE) has been recently described in multiple sclerosis (MS) patients as a potential in vivo marker of cortical pathology. OBJECTIVES: To investigate the association of LM CE and development of cortical atrophy in 50 MS patients (27 relapsing-remitting (RR) and 23 secondary-progressive (SP)) followed for 5 years. METHODS: The presence and number of LM CE foci were assessed only at the 5-year follow-up using three-dimensional (3D) fluid-attenuated inversion recovery magnetic resonance imaging (MRI) sequence obtained 10 minutes after single dose of gadolinium injection on 3T scanner...
November 3, 2016: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/27804015/combined-brain-and-anterior-visual-pathways-mris-assist-in-early-identification-of-neuromyelitis-optica-spectrum-disorder-at-onset-of-optic-neuritis
#18
D Buch, J Savatovsky, O Gout, C Vignal, R Deschamps
Acute optic neuritis (ON) is the initial presentation in half of neuromyelitis optica spectrum disorder (NMO-SD) cases. Our objective was to evaluate accuracy of combined MRIs of the anterior visual pathways and of the brain to correctly identify NMO-SD among patients with acute ON. We performed a retrospective study on patients with acute ON in NMO-SD (16 episodes) and first-event non-NMO-SD (32 episodes). All MRIs included exams of the brain and anterior visual pathways using T2-weighted and post-gadolinium T1-weighted coronal thin slices...
November 1, 2016: Acta Neurologica Belgica
https://www.readbyqxmd.com/read/27799546/in-vivo-nanoparticle-imaging-of-innate-immune-cells-can-serve-as-a-marker-of-disease-severity-in-a-model-of-multiple-sclerosis
#19
Klara Kirschbaum, Jana K Sonner, Matthias W Zeller, Katrin Deumelandt, Julia Bode, Rakesh Sharma, Thomas Krüwel, Manuel Fischer, Angelika Hoffmann, Milene Costa da Silva, Martina U Muckenthaler, Wolfgang Wick, Björn Tews, John W Chen, Sabine Heiland, Martin Bendszus, Michael Platten, Michael O Breckwoldt
Innate immune cells play a key role in the pathogenesis of multiple sclerosis and experimental autoimmune encephalomyelitis (EAE). Current clinical imaging is restricted to visualizing secondary effects of inflammation, such as gliosis and blood-brain barrier disruption. Advanced molecular imaging, such as iron oxide nanoparticle imaging, can allow direct imaging of cellular and molecular activity, but the exact cell types that phagocytose nanoparticles in vivo and how phagocytic activity relates to disease severity is not well understood...
November 15, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27797676/global-and-regional-brain-assessment-with-quantitative-mr-imaging-in-patients-with-prior-exposure-to-linear-gadolinium-based-contrast-agents
#20
Hirofumi Kuno, Hernán Jara, Karen Buch, Muhammad Mustafa Qureshi, Margaret N Chapman, Osamu Sakai
Purpose To assess the association of global and regional brain relaxation times in patients with prior exposure to linear gadolinium-based contrast agents (GBCAs). Materials and Methods The institutional review board approved this cross-sectional study. Thirty-five patients (nine who had received GBCA gadopentetate dimeglumine injections previously [one to eight times] and 26 patients who did not) who underwent brain magnetic resonance (MR) imaging with a mixed fast spin-echo pulse sequence were assessed. The whole brain was segmented according to white and gray matter by using a dual-clustering algorithm...
October 31, 2016: Radiology
keyword
keyword
79610
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"