Echo
Mostrando 25-36 de 400 artigos, teses e dissertações.
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25. Mulheres, negritude e a construção de uma modernidade transnacional
Resumo: Partindo do conceito de negritude formulado por Aimé Césaire, proponho uma reflexão sobre os desdobramentos da negritude em diferentes momentos históricos, nos quais o conceito é ressignificado através de interpretações que atendem às demandas políticas e culturais de cada contexto. Assim, meu texto pretende enfocar duas vozes poéticas fem
Rev. Estud. Fem.. Publicado em: 01/04/2019
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26. Treatment of Pericardial Effusion Through Subxiphoid Tube Pericardiostomy and Computerized Tomography- or Echocardiography - Guided Percutaneous Catheter Drainage Methods
Abstract Objective: In this retrospective study, we aimed to observe the efficacy of pericardial effusion (PE) treatments by a survey conducted at the Department of Cardiovascular Surgery, Faculty of Medicine, Atatürk University. Methods: In order to get comparable results, the patients with PE were divided into three groups - group A, 480 patients who un
Braz. J. Cardiovasc. Surg.. Publicado em: 2019-04
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27. Modeling and FPGA-based implementation of an efficient and simple envelope detector using a Hilbert Transform FIR filter for ultrasound imaging applications
Abstract Introduction Although the envelope detection is a widely used method in medical ultrasound (US) imaging to demodulate the amplitude of the received echo signal before any back-end processing, novel hardware-based approaches have been proposed for reducing its computational cost and complexity. In this paper, we present the modeling and FPGA impleme
Res. Biomed. Eng.. Publicado em: 15/01/2018
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28. Pattern recognition of abscesses and brain tumors through MR spectroscopy: Comparison of experimental conditions and radiological findings
Abstract Introduction The interpretation of brain tumors and abscesses MR spectra is complex and subjective. In clinical practice, different experimental conditions such as field strength or echo time (TE) reveal different metabolite information. Our study aims to show in which scenarios magnetic resonance spectroscopy can differentiate among brain tumors,
Res. Biomed. Eng.. Publicado em: 17/08/2017
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29. Ultrasonic method of microvibration detection: part II - additional processing method and applications
Abstract Introduction In the last 28 years, the scientific community has been using elastography to evaluate the mechanical properties of biological tissue. The aim of this work was the optimization of the UDmV method, presented in Part I of the series, by means of modifying the technique employed to generate the reference sine and cosine functions, used fo
Res. Biomed. Eng.. Publicado em: 17/08/2017
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30. Ultrasound imaging in women's arm flexor muscles: intra-rater reliability of muscle thickness and echo intensity
ABSTRACT Background Different ultrasound parameters have been frequently used to assess changes associated with training, aging, immobilization, and neuromuscular diseases. However, an exploratory reliability analysis of the echo intensity (EI) and muscle thickness (MT) of the forearm flexors is scarce, especially in women. Objective The purpose of the pre
Braz. J. Phys. Ther.. Publicado em: 22/09/2016
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31. Accuracy of magnetic resonance imaging for measuring maturing cartilage: A phantom study
OBJECTIVES: To evaluate the accuracy of magnetic resonance imaging measurements of cartilage tissue-mimicking phantoms and to determine a combination of magnetic resonance imaging parameters to optimize accuracy while minimizing scan time. METHOD: Edge dimensions from 4 rectangular agar phantoms ranging from 10.5 to 14.5 mm in length and 1.25 to 5.5 mm in
Clinics. Publicado em: 2016-07
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32. A imprensa feminina no Rio de Janeiro nas décadas finais do século XIX
Resumo: O objetivo deste artigo é apresentar e analisar três jornais escritos por mulheres e que circularam na cidade do Rio de Janeiro no final do Oitocentos: O Sexo Feminino (1873-1889) ‒ o qual, após a República passou a se chamar O Quinze de Novembro do Sexo Feminino (1889-1890) ‒, Echo das Damas (1879-1888) e A Familia (1888-1894). Com relação
Rev. Estud. Fem.. Publicado em: 2016-04
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33. Análise da medida da espessura endometrial pela ultrassonografia transvaginal em pacientes obesasAnalysis of endometrial thickness measured by transvaginal ultrasonography in obese patients
Objetivo Relacionar os valores do eco endometrial obtidos à ultrassonografia transvaginal com o índice de massa corporal de pacientes na pós-menopausa; verificar se existe maior prevalência de espessamento endometrial naquelas com índice de massa corporal ≥30.Métodos Trata-se de estudo analítico, transversal, que avaliou 294 pacientes. As pacientes
Einstein (São Paulo). Publicado em: 2014-06
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34. Ultrasound method applied to characterize healthy femoral diaphysis of Wistar rats in vivo
A simple experimental protocol applying a quantitative ultrasound (QUS) pulse-echo technique was used to measure the acoustic parameters of healthy femoral diaphyses of Wistar rats in vivo. Five quantitative parameters [apparent integrated backscatter (AIB), frequency slope of apparent backscatter (FSAB), time slope of apparent backscatter (TSAB), integrated
Braz J Med Biol Res. Publicado em: 04/04/2014
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35. Simulação de sinais de RMN através das equações de Bloch
The aim of this paper was to present a simple and fast way of simulating Nuclear Magnetic Resonance signals using the Bloch equations. These phenomenological equations describe the classical behavior of macroscopic magnetization and are easily simulated using rotation matrices. Many NMR pulse sequences can be simulated with this formalism, allowing a quantit
Quím. Nova. Publicado em: 2014
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36. Análise do teor e da qualidade dos lipídeos presentes em sementes de oleaginosas por rmn de baixo campo
To choose among the variety of oleaginous plants for biodiesel production, the oil content of several matrices was determined through different low-field ¹H nuclear magnetic resonance (NMR) experiments with varied pulse sequences, namely single-pulse, spin-echo, CPMG, and CWFP. The experiments that involved the first three sequences showed high correlation
Quím. Nova. Publicado em: 2014