Mri Hardware
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Improving magnetic field homogeneity of a resistive magnet with iron core using passive Shimming method / Homogenização de um magneto resistivo com núcleo de ferro utilizando-se o método de Shimming passivo
Este trabalho consistiu na implementação de um método de homogeneização de campo, denominado shimming passivo. Esse método é caracterizado pela inserção de pequenas peças ferromagnéticas no interior do magneto; a interação destas peças com o campo magnético principal produz campos locais capazes de corrigir inomogeneidades indesejadas, quando
Publicado em: 2004
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2. Desenvolvimento de um tomógrafo de ressonância magnética: integração e otimização. / Development of a magnetic resonance tomograph: integration and improvement.
The present work describes the development of a Magnetic Resonance Tomography system to be used for medical diagnostics. It is based on commercially available subsystems such as used as in commercial MRI equipments. The main contributions to the project were: the development of fill up electronics and software needed to turn the acquired hardware into a MR T
Publicado em: 1995
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3. Development of the technology of nuclear magnetic resonance tomography (ToRM) / Desenvolvimento da tecnologia de tomografia por ressonância magnética nuclear
We describe in this work the development of hardware and software necessary to implement the Magnetic Resonance Imaging (MRI) techniques. Our major subjects were the construction of an acquisition and control system which allowed the operation of a pulsed Fourier NMR spectrometer as a NMR Tomograph; further we oriented the developing of a NMR spectrometer wh
Publicado em: 1987
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4. Three-dimensional functional magnetic resonance imaging of human brain on a clinical 1.5-T scanner.
Functional magnetic resonance imaging (fMRI) is a tool for mapping brain function that utilizes neuronal activity-induced changes in blood oxygenation. An efficient three-dimensional fMRI method is presented for imaging brain activity on conventional, widely available, 1.5-T scanners, without additional hardware. This approach uses large magnetic susceptibil
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5. Measurement of MRI scanner performance with the ADNI phantom
The objectives of this study are as follows: to describe practical implementation challenges of multisite, multivendor quantitative studies; to describe the MRI phantom and analysis software used in the Alzheimer’s Disease Neuroimaging Initiative (ADNI) study, illustrate the utility of the system for measuring scanner performance, the ability to assess gra
American Association of Physicists in Medicine.