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[Theoretical principles and technical realization of high resolution nuclear magnetic resonance tomography with the example of a dedicated coil system]. / Theoretische Grundlagen und technische Realisation der hochauflösenden Kernspintomographie (KST) am Beispiel eines dedizierten Spulensystems.
Mäurer, J; Requardt, H; Herrling, T; Knollmann, F D; Schedel, H; Vogl, T J; Felix, R.
Afiliação
  • Mäurer J; Strahlenklinik und Poliklinik, Virchow-Klinikum, Medizinische Fakultät der Humboldt-Universität Berlin, Deutschland.
Bildgebung ; 63(1): 40-6, 1996 Mar.
Article em De | MEDLINE | ID: mdl-8653008
The theory of high-resolution magnetic resonance imaging (MRI) and the physical properties of a dedicated coil system with its clinical application are reviewed. To evaluate the spatial resolution of the system, a phantom sample was depicted by a transverse T1-weighted sequence (time of repetition 500 ms, time of echo 25 ms, 256 x 256 matrix, 3 acquisitions, field of view 25 mm2). Relative signal intensity decrease was less using the 5-cm coil, as signal intensity field distribution depends on coil diameter. The phantom appeared as an attainable resolution of 100-microns pixel width using the 2.5-cm coil. For the 5-cm coil the pixel width was 200 microns, not accomplishing clear resolution of the phantom. Coil head choice depends on the anatomic depth of the target organ. Work-up of the skin and musculoskeletal lesions is the main indication for high-resolution MRI using surface coils.
Assuntos
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Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Processamento de Imagem Assistida por Computador / Imageamento por Ressonância Magnética / Aumento da Imagem Tipo de estudo: Diagnostic_studies / Prognostic_studies Limite: Humans Idioma: De Revista: Bildgebung Ano de publicação: 1996 Tipo de documento: Article
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Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Processamento de Imagem Assistida por Computador / Imageamento por Ressonância Magnética / Aumento da Imagem Tipo de estudo: Diagnostic_studies / Prognostic_studies Limite: Humans Idioma: De Revista: Bildgebung Ano de publicação: 1996 Tipo de documento: Article