Zusammenfassung
Die Mehrzeilen-Spiral-CT ist das Verfahren der Wahl im Staging des Bronchialkarzinoms. Bei Schichtdicken <1 mm durch den gesamten Thorax sind auch mit der CT Rekonstruktionen in beliebiger Ebenen in Hochauflösung durchführbar, die vor allem für das T-Staging wertvoll sind. Darüber hinaus stehen verschiedene Nachverarbeitungsverfahren des digitalen Datensatzes zur Verfügung wie virtuelle Bronchoskopien und 3D-Oberflächen- oder Volumendarstellungen. Die MRT kommt zum Einsatz als Alternativverfahren bei schwerer KM-Unverträglichkeit (Jod) und kann primär bei Ausbrecher- und Pancoast-Tumoren wegen der im Vergleich zur CT besseren Weichteilkontrastauflösung eingesetzt werden. Unveränderte Schwachstelle des Stagings mit CT und MRT bleibt die Lymphknotenevaluation, wo die Größe als einziges valides Kriterium gilt. Bei bekannter Überlegenheit der PET im Lymphknotenstaging und auch im Nachweis extrathorakaler Tumormanifestationen deutet sich an, dass die Zukunft der kombinierten PET-CT als Ganzkörperuntersuchung gehört. Für den Ausschluss von Hirnmetastasen ist die KM-MRT unverändert die Methode des Wahl.
Abstract
Multislice-CT is established as the method of choice in the staging of lung cancer. Since CT images below 1 mm collimation are available throughout the chest, reconstruction images with high spatial resolution significantly improve T-staging. In addition, post-processing of the digital data set includes different animations such as virtual bronchoscopy, 3-D surface, or volume rendering, respectively. MRI only serves as a problem solving method in severe incompatibility of iodinated contrast material, and as a primary diagnostic tool in Pancoast and chest wall invading tumours, due to its superior soft tissue contrast resolution compared to CT. Both MRI and CT show poor results in N-staging, with size as the single proven criterion. Because PET demonstrated superiority in N-staging and, furthermore, in the diagnosis of extrathoracic metastases, the future probably belongs to the combined PET-CT system as a whole-body examination. For the diagnosis of brain metastases, contrast enhanced MRI is the method of choice.
Abbreviations
- 3D:
-
dreidimensional
- CT:
-
Computertomographie
- MRI:
-
„magnetic resonance imaging“
- MRT:
-
Magnetresonanztomographie
- PET:
-
Positronenemissionstomographie
- VATS:
-
„video assisted thoracic surgery“
- MSCT:
-
„multi slice computed tomography“ (Mehrzeilencomputertomographie)
- HE:
-
Hounsfield-Einheiten (Dichtemessung CT)
- AJCC:
-
American Joint Committee on Cancer Staging
- KM:
-
Kontrastmittel
- VCS:
-
V. cava superior
- FOV:
-
„field-of-view“
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Bittner, R.C., Pech, M. Staging des Bronchialkarzinoms. Pneumologe 2, 102–110 (2005). https://doi.org/10.1007/s10405-005-0029-0
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DOI: https://doi.org/10.1007/s10405-005-0029-0