Zusammenfassung
Die Lunge war lange Zeit aufgrund der geringen Protonendichte des Parenchyms sowie des schnellen Signalzerfalls an den Luft-Gewebe-Grenzen der Magnetresonanztomographie (MRT) schwer zugänglich. Technische Neuerungen haben diese Anforderungen größtenteils adressiert. Pulmonale Veränderungen, welche mit Gewebevermehrung einhergehen („Plus-Pathologien“), lassen sich nun aufgrund der lokal vermehrten Protonendichte mit einer hohen diagnostischen Genauigkeit darstellen. Die MRT bietet im Vergleich zur Computertomographie (CT) ein umfassendes Spektrum funktioneller Bildgebungsverfahren (Atemmechanik, Perfusion, Ventilation) sowie – als strahlungsfreie, nicht-invasive Untersuchungsmodalität – die Möglichkeit wiederholter Untersuchungen für Verlaufsbeurteilungen oder die Überwachung von Therapieeffekten, auch bei Kindern. In diesem Artikel besprechen wir technische Aspekte, geben Protokollvorschläge und erörtern die Rolle der Lungen-MRT in der routinemäßigen Beurteilung verschiedener Erkrankungen.
Abstract
Due to the low proton density of the lung parenchyma and the rapid signal decay at the air-tissue interfaces, for a long time the lungs were difficult to access using magnetic resonance imaging (MRI); however, technical advances could address most of these obstacles. Pulmonary alterations associated with tissue proliferation (“plus pathologies”), can now be detected with high diagnostic accuracy because of the locally increased proton density. Compared to computed tomography (CT), MRI provides a comprehensive range of functional imaging procedures (respiratory mechanics, perfusion and ventilation). In addition, as a radiation-free noninvasive examination modality, it enables repeated examinations for assessment of the course or monitoring of the effects of treatment, even in children. This article discusses the technical aspects, gives suggestions for protocols and explains the role of MRI of the lungs in the routine assessment of various diseases.
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L. Wucherpfennig: A. Finanzielle Interessen: L. Wucherpfennig gibt an, dass kein finanzieller Interessenkonflikt besteht. – B. Nichtfinanzielle Interessen: Assistenzärztin Diagnostische und Interventionelle Radiologie, Universitätsklinikum Heidelberg, Heidelberg. H.-U. Kauczor: A. Finanzielle Interessen: Siemens: finanzielle Förderung und geldwerte Leistungen. – Siemens: Referentenhonorar. – B. Nichtfinanzielle Interessen: Ärztlicher Direktor, Klinik für Diagnostische und Interventionelle Radiologie, Universitätsklinik Heidelberg. M. Eichinger: A. Finanzielle Interessen: Vortragshonorare oder Kostenerstattung als passiv Teilnehmende: Roche Pharma, Vertex Pharmaceuticals, Boehringer Ingelheim. – B. Nichtfinanzielle Interessen: Oberärztin, Abteilung Diagnostische und Interventionelle Radiologie mit Nuklearmedizin, Thoraxklinik, Universitätsklinik Heidelberg. M.O. Wielpütz: A. Finanzielle Interessen: Studienförderung: Vertex Pharmaceuticals, Boehringer Ingelheim. – Honorar an das Institut gezahlt: Vertex Pharmaceuticals, Boehringer Ingelheim. – B. Nichtfinanzielle Interessen: Stellvertretender Ärztlicher Direktor, Klinik für Diagnostische und Interventionelle Radiologie, Universitätsklinikum Heidelberg | Vorstand AG Thorax, Deutsche Röntgengesellschaft; Board Member, European Society for Thoracic Imaging.
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Was ist keine Herausforderung bei der Magnetresonanztomographie der Lunge?
Atembewegungen
Gefäßbewegungen
Suszeptibilitätsartefakte
Darmbewegungen
Herzbewegungen
Welches der folgenden Phänomene ist eine sog. Minus-Pathologie in der Magnetresonanztomographie der Lunge?
Atelektase
Emphysembulla
Tumor
Infiltrat
Erguss
Was ist ein großer Vorteil der Magnetresonanztomographie gegenüber anderen bildgebenden Verfahren?
Kostengünstig
Leicht verfügbar
Schnelle Untersuchungszeit
Kein Problem bei klaustrophoben Patienten
Kombination von morphologischer und funktioneller Bildgebung
Welche Scanner sind zur Lungenbildgebung besonders gut geeignet?
< 1 Tesla (T)
1 T
1,5 T
3 T
7 T
Welches ist keine Basissequenz der Magnetresonanztomographie (MRT) der Lunge?
T1/T2-bSSFP („balanced steady-state free precession“)
T1-TSE (Turbo-Spin-Echo)
T1-GRE (Gradientenecho)
T2-FSE („fast spin echo“)
3He-MRT
Welches ist keine Indikation für eine Magnetresonanztomographie der Lunge bei Kindern?
CF („cystic fibrosis“)
Interstitielle Lungenerkrankung
Pneumonie
Akute Lungenarterienembolie
Lungensequester
Bei welcher Erkrankung ist die Magnetresonanztomographie der Lunge die First-line-Untersuchung?
Rundherd
Interstitielle Lungenerkrankung
Akute Lungenarterienembolie
Pancoast-Tumor
Pneumonie
Welche Pathologie wird nicht primär durch funktionelle Magnetresonanztomographietechniken visualisiert?
Konsolidierung
Störung der Atemmechanik
Luftröhren‑/Atemwegsinstabilität
Perfusionsstörung
Ventilationsstörung
Wozu könnte die Magnetresonanztomographie zukünftig bei der Bildgebung der interstitiellen Lungenerkrankungen von Nutzen sein?
Darstellung subtiler subpleuraler fibrotischer Veränderungen
Darstellung kleiner Knötchen
Darstellung von Minus-Pathologien
Lymphadenopathie bei Sarkoidose
Bewertung der Entzündungsaktivität
Bei welchen Patienten stellt die Magnetresonanzangiographie bei der Bildgebung einer akuten Lungenarterienembolie keine wertvolle Alternative zur Computertomographie dar?
Schwangere
Instabile Patienten
Junge Patienten
Patienten mit Kontrastmittelallergie
Patienten mit Niereninsuffizienz
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Wucherpfennig, L., Kauczor, HU., Eichinger, M. et al. Magnetresonanztomographie der Lunge. Radiologie 63, 849–862 (2023). https://doi.org/10.1007/s00117-023-01229-1
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DOI: https://doi.org/10.1007/s00117-023-01229-1