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Kontrastmittelfreie Magnetresonanzangiographie

Magnetic resonance angiography without contrast agents

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Zusammenfassung

Hintergrund

Der Einsatz von Magnetresonanztomographie(MRT-)Kontrastmitteln soll bei MR-Angiographien (MRA) minimiert werden.

Fragestellung

Übersicht über existierende native MRT-Techniken für die MR-Angiographie

Material und Methode

Native MRT-Angiographien nutzen aus, dass ungesättigtes fließendes Blut hyperintens zu statischem Gewebe ist („Time-of-flight“-MRA), dass Fluss eine darstellbare Phasenverschiebung induziert („Phase-contrast“-MRA), dass Blutmarkierung durch selektive Inversion eine Boluspassage dynamisch darstellt („arterial spin labeling“) und dass spezielle MRT-Sequenzen die Kontrasteigenschaften von Blut nutzen.

Schlussfolgerungen

Native MRT-Angiographien können bei geeigneter Wahl Gefäße wie Hirnarterien und Koronarien zuverlässig darstellen und zusätzliche Informationen über die Flussdynamik liefern.

Abstract

Background

The use of magnetic resonance imaging (MRI) contrast agents should be minimized in MR angiography.

Objective

Overview of existing native MRI techniques for MR angiography

Material and methods

Native MRI angiography uses the fact that unsaturated flowing blood is hyperintense to static tissue (time-of-flight MRA), that blood flow induces a detectable phase shift (phase contrast MRA), that labeling by selective inversion can dynamically image a bolus passage (arterial spin labeling) and that special MRI sequences exist which utilize the contrast properties of blood.

Conclusion

Native MRI angiography, if properly selected, can reliably delineate vessels such as cerebral arteries and coronary arteries and can provide additional information about the flow dynamics.

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Authors and Affiliations

  1. Klinik für Radiologie – Medizin Physik, Universitätsklinikum Freiburg, Medizinische Fakultät, Universität Freiburg, Killianstr. 5a, 79106, Freiburg, Deutschland

    M. Bock

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Interessenkonflikt

M. Bock arbeitet mit der Firma Siemens Healthcare GmbH zusammen im Rahmen einer Forschungskooperation.

Für diesen Beitrag wurden vom Autor keine Studien an Menschen oder Tieren durchgeführt. Für die aufgeführten Studien gelten die jeweils dort angegebenen ethischen Richtlinien.

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Bock, M. Kontrastmittelfreie Magnetresonanzangiographie. Radiologe 59, 523–532 (2019). https://doi.org/10.1007/s00117-019-0534-5

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