Gadolinium
Mostrando 1-12 de 132 artigos, teses e dissertações.
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1. DEVELOPMENT AND OPTIMIZATION OF A SPECTROPHOTOMETRIC METHOD WITH CLOUD POINT EXTRACTION FOR DETERMINATION OF GADOLINIUM
This work describes a simple, sensible, and low-cost analytical method, based on cloud-point extraction (CPE) of the surfactant (1,1,3,3-Tetramethylbutyl)phenyl-polyethylene glycol (Triton X-114), for the efficient extraction and sensible determination of gadolinium after its complexation with 1-(2-pyridylazo)-2-naphthol (PAN) and subsequent determination by
Química Nova. Publicado em: 2022
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2. The benefits and side effects of gadolinium-based contrast agents in multiple sclerosis patients
Revista da Associação Médica Brasileira. Publicado em: 2022
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3. The clinical features and image characteristics of Meniere’s disease patients with endolymphatic hydrops confirmed by enhanced magnetic resonance imaging
Abstract Objectives: To analyze and summarize the clinical features and image characteristics of Meniere’s Disease (MD) patients with Endolymphatic Hydrops (EH) confirmed by enhanced Magnetic Resonance Imaging (MRI). Methods: 252 MD patients with EH confirmed by MRI were enrolled. All patients met the diagnostic criteria forMD and underwent intravenous g
Brazilian Journal of Otorhinolaryngology. Publicado em: 2022
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4. Audio-vestibular and radiological analysis in Meniere’s disease
Abstract Objective: Intravenous gadolinium-enhanced inner ear magnetic resonance imaging (IV Gd-enhanced inner ear MRI) is a new technique for diagnosing Meniere’s disease (MD). Vestibular tests have also long been used forMD, but which tests should be included in the oto-neurological test battery remains controversial. The evaluation method to be used to
Brazilian Journal of Otorhinolaryngology. Publicado em: 2022
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5. Iatrogenic Complications During the Diagnostic Work-Up of an Inflammatory Cardiomyopathy
Abstract A 72-year-old woman was admitted for acute heart failure. The echocardiography revealed moderate depression of the left ventricular ejection fraction. Coronary disease was excluded by coronarography. Cardiac magnetic resonance showed predominantly left ventricular septal hypertrophy and severe depression of the left ventricular systolic function. Th
Int. J. Cardiovasc. Sci.. Publicado em: 2020-12
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6. Recomendações práticas na segurança do uso de gadolínio na ressonância magnética: resultados de um painel Delphi com especialistas
Resumo Objetivo: Avaliar aspectos práticos do uso de agentes de contraste à base de gadolínio (gadolinium-based contrast agents - GBCAs) por médicos especialistas em radiologia. Materiais e Métodos: Dez radiologistas de diferentes regiões do Brasil foram convidados a participar de um painel Delphi com perguntas sobre o uso de GBCAs lineares e macroc�
Radiol Bras. Publicado em: 2020-08
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7. A Comparative Study on the Groebke-Blackburn-Bienaymé Three-Component Reaction Catalyzed by Rare Earth Triflates under Microwave Heating
Over the last twenty years, the Groebke-Blackburn-Bienaymé (GBB) reaction has been emerged as a powerful tool to access different nitrogen-based heterocycles as privileged scaffolds in medicinal chemistry. This multicomponent reaction is usually catalyzed by ordinary Brønsted or Lewis acid catalysts. Herein, we present a comparative study on the catalytic
J. Braz. Chem. Soc.. Publicado em: 2020-07
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8. Separation of gadolinium and europium from chloride media by the solvent extraction technique
Abstract Obtaining rare earth elements (REE) is a complicated task, due mainly to the difficulty of separating and purifying them. Solvent extraction is the most widely used technique for separating REE, and the most common extractants used are organophosphorus acids. The low selectivity of this technique leads to the need for a high number of extraction cel
REM, Int. Eng. J.. Publicado em: 2020-03
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9. Improving acute demyelinating lesion detection: which T1-weighted magnetic resonance acquisition is more sensitive to gadolinium enhancement?
RESUMO No que se refere à necessidade de um método preciso e padronizado para a detecção de atividade inflamatória em esclerose múltipla (EM), diferentes aquisições de RM devem ser comparadas com objetivo de escolher a sequência mais sensível para a rotina clínica. Objetivo Comparar a sensibilidade das sequências ponderadas em T1 após a admini
Arq. Neuro-Psiquiatr.. Publicado em: 29/07/2019
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10. Identification of Factors Related to Cases of Benign Paroxysmal Positional Vertigo Refractory to Canalicular Repositioning Maneuvers and Evaluation of the Need for Magnetic Resonance Imaging in their Management: Retrospective Analysis of a Series of 176 Cases
Abstract Introduction Benign paroxysmal positional vertigo (BPPV) is the most common form of peripheral vertigo, and, in most cases, it presents a favorable prognosis. The treatment is based on a series of specific canalicular repositioningmaneuvers that offer an efficacy close to 100%. Despite this, there are cases that are refractory to treatment, with t
Int. Arch. Otorhinolaryngol.. Publicado em: 18/07/2019
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11. Intra-Atrial Dyssynchrony Using Cardiac Magnetic Resonance to Quantify Tissue Remodeling in Patients with Atrial Fibrillation
Resumo Fundamento: Estudos recentes sugerem que o realce tardio com gadolínio (RTG) no átrio esquerdo (AE) pode quantificar a remodelação tecidual subjacente que abriga a fibrilação atrial (FA). No entanto, a quantificação do RTG-AE requer um trabalho intenso de aquisição por ressonância magnética e pós-processamento em centros experientes. A
Arq. Bras. Cardiol.. Publicado em: 15/04/2019
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12. F-127-Assisted Sol-Gel Synthesis of Gd2O3:Eu3+ Powders and Films
In the current work, the influence of Pluronic F-127 (S = F-127) and temperature on the luminescent properties of Gd2O3:Eu3+ (Gd:S = 1:2) powders and films was studied. In order to synthesize the powders and films (by the dip-coating technique), Gd2O3: Eu3+ (5 mol%) ceramics were elaborated by the sol-gel route, using gadolinium and europium nitrates as prec
Mat. Res.. Publicado em: 08/04/2019