A pulsed electromagnet controller for prepolarized MRI /
Magnetic resonance imaging (MRI) is a popular medical imaging modality that provides high resolution images with superior contrast. Conventional MRI systems rely on large magnets to generate the main magnetic field, B₀, that is both strong and extremely uniform to minimize image distortion. A strong...
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| Format: | Thesis eBook |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
2001.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | Magnetic resonance imaging (MRI) is a popular medical imaging modality that provides high resolution images with superior contrast. Conventional MRI systems rely on large magnets to generate the main magnetic field, B₀, that is both strong and extremely uniform to minimize image distortion. A strong and uniform magnetic field creates magnetization in the sample that provides a source of a signal. Such a field can be created by a heavy permanent magnet or by cryogenically cooled superconducting system. An alternative approach, called prepolarized MRI (PMRI), uses a pulsed magnetic field to create magnetization prior to signal collection. PMRI has been suggested as a low-cost approach to boost the signal-to-noise ratio (SNR) which is a fundamental measure of scanner performance. To enable PMRI experiments, a pulsed electromagnet controller has been designed and built. In this thesis, the theory of the controller is presented and results are discussed. |
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| Item Description: | "Major subject: Electrical Engineering". Vita. |
| Physical Description: | x, 50 leaves : illustrations ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references (leaves 47-49). |