Zusammenfassung
Die kardiovaskuläre Magnetresonanztomographie (MRT) hat sich zu einer etablierten bildgebenden Methode zur Untersuchung von Patienten mit angeborenen Herzfehlern entwickelt. Sie erlaubt in einer einzigen Untersuchung die exakte Beurteilung von Anatomie, globaler und regionaler Funktion, Blutflüssen sowie der myokardialen Perfusion und Vitalität. In der klinischen Routine erfolgen die Untersuchungen zumeist bei einer Feldstärke von 1,5 Tesla (T), mittlerweile gibt es jedoch Geräte und Bildgebungstechniken, die die kardiovaskuläre MRT auch bei 3 T ermöglichen. Der wesentliche Vorteil der MRT bei 3 T ist das höhere Signal-zu-Rausch-Verhältnis, das sowohl zu einer Verbesserung der Bildqualität als auch zu einer Verkürzung der Untersuchungszeit genutzt werden kann. Darüber hinaus bestehen verschiedene andere Unterschiede gegenüber Systemen mit niedriger Feldstärke, die im praktischen Einsatz beachtet werden müssen. Dieser Artikel beschreibt die Erfahrungen der 3-T-MRT für die Untersuchung von Patienten mit angeborenen Herzfehlern anhand methodischer Betrachtungen und Beispiele.
Abstract
Cardiovascular magnetic resonance imaging (CMR) has become a routinely used imaging modality for congenital heart disease. A CMR examination allows the assessment of thoracic anatomy, global and regional cardiac function, blood flow in the great vessels and myocardial viability and perfusion. In the clinical routine cardiovascular MRI is mostly performed at field strengths of 1.5 Tesla (T). Recently, magnetic resonance systems operating at a field strengths of 3 T became clinically available and can also be used for cardiovascular MRI. The main advantage of CMR at 3 T is the gain in the signal-to-noise ratio resulting in improved image quality and/or allowing higher acquisition speed. Several further differences compared to MRI systems with lower field strengths have to be considered for practical applications. This article describes the impact of CMR at 3 T in patients with congenital heart disease by meanings of methodical considerations and case studies.
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Danksagung
Die Autoren danken der Fördergemeinschaft Deutsche Kinderherzzentren e.V. (http://www.fg-dkhz.de) für die finanzielle Unterstützung bei der Etablierung der kardialen MRT bei 3 Tesla in unserem Zentrum. Außerdem danken wir Frau Traudel Hansen, Klinik für angeborene Herzfehler und Kinderkardiologie, Universitätsklinikum Schleswig-Holstein, für ihre tatkräftige Hilfe im Rahmen der MRT-Untersuchungen. Sowie Herrn Dr. Jürgen Bunke, Herrn Dr. Bernhard Schnackenburg und Herrn Rainer Sokolowski von der Philips MedizinSysteme GmbH.
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Voges, I., Jerosch-Herold, M., Helle, M. et al. 3-Tesla-Magnetresonanztomographie zur Untersuchung von Kindern und Erwachsenen mit angeborenen Herzfehlern. Radiologe 50, 799–808 (2010). https://doi.org/10.1007/s00117-010-2025-6
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DOI: https://doi.org/10.1007/s00117-010-2025-6