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Stationäre Gradientenecho-Bildgebung

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Magnetresonanzbildgebung

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Zusammenfassung

Die konventionelle MR-Bildgebung, basierend auf Spin-Echo (SE) oder Gradienten-(Feld)-Echo, hat den entscheidenden Nachteil, dass die Scanzeit zu lang ist, verglichen mit den Zeitkonstanten der Herzbewegung, der Peristaltik und den Atembewegungen des Patienten. Das führt zum Anstieg von Bildartefakten. Diese lange Scanzeit hat ihren Grund darin, dass eine gewisse Zeit vergehen muss, bis sich die Spins nach einer Anregung wieder im Gleichgewicht befinden und ein neuer Anregungspuls appliziert werden kann (siehe Kap. 2). In vielen Fällen können die Probleme der Patientenbewegungen dadurch umgangen werden, dass eine Triggerung (EKG-Triggerung, Atemtriggerung) erfolgt. Das versagt aber in Fällen schwerer Arrhythmien oder bei stark traumatisierten Patienten, bei denen schnelle dynamische Bildgebungen bzw. ultraschnelle Bildsequenzen erforderlich sind.

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Authors and Affiliations

  1. Haagbeuklaan 7, 6711 NK, Ede, Niederlande

    Dr. Ir. Marinus T. Vlaardingerbroek

  2. Zweerslaan 3, 5691 GN, Son, Niederlande

    Dr. Ir. Jacques A. den Boer

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  1. Dr. Ir. Marinus T. Vlaardingerbroek
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  2. Dr. Ir. Jacques A. den Boer
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© 2004 Springer-Verlag Berlin Heidelberg

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Vlaardingerbroek, M.T., den Boer, J.A. (2004). Stationäre Gradientenecho-Bildgebung. In: Magnetresonanzbildgebung. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-18697-4_5

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  • DOI: https://doi.org/10.1007/978-3-642-18697-4_5

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  • Print ISBN: 978-3-642-62252-6

  • Online ISBN: 978-3-642-18697-4

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