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Multidetektor-CT zur Diagnostik traumatologischer Notfälle

Imaging of trauma with multi-detector computed tomography

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Zusammenfassung

Die Diagnostik traumatischer Verletzungen ist eine der Kernaufgaben der modernen Radiologie. Eine frühe und umfassende bildgebende Diagnostik ist entscheidend für eine zeitnahe und v. a. zielgerichtete Therapie potenziell lebensbedrohlicher Verletzungen. Etablierte Untersuchungsverfahren wie die Projektionsradiographie (CR) und die Sonographie (US) stellen nach wie vor die Basisdiagnostik dar. Jedoch wurde in vielen vergleichenden Studien nachgewiesen, dass die Detektionsrate von Verletzungen bei beiden Modalitäten deutlich geringer ist als durch die Computertomographie (CT).

Durch die Einführung der Multidetektor-CT (MDCT) und der damit verbundenen dramatisch verkürzten Untersuchungszeiten und der höheren diagnostischen Sicherheit ist die CT bei vielen traumatologischen Fragestellungen zum Goldstandard in der Akutdiagnostik geworden. Da die MDCT eine nicht unerhebliche Strahlenbelastung bei der überwiegend jungen Patientenpopulation mit sich bringt, ist eine strenge Indikationsstellung zu beachten. Hinzu kommt die Notwendigkeit zur Optimierung der Untersuchungsprotokolle im Hinblick auf die erwarteten Verletzungsmuster und bzgl. einer individuell anzupassenden Dosiseinsparung bei gleich bleibender Bildqualität.

Durch die enorm angestiegene Bilderzahl einer Mehrzeilen-CT ist es zudem erforderlich, die relevanten Bilder auf ein vernünftiges Maß zu begrenzen. Dieser Artikel gibt Empfehlungen zur Protokolloptimierung hinsichtlich der Untersuchungsparameter und auch zur Bildrekonstruktion und -archivierung.

Abstract

Diagnosis of trauma-related injuries is a key task in modern radiology. Early, thorough and accurate detection of potentially life-threatening injuries is crucial for fast and targeted initiation of treatment.

Conventional radiography (CR) and ultrasound (US) are well-established and still represent the basic diagnostic tools for trauma imaging. However, a number of studies have shown a lower detection rate of injuries for radiography and ultrasound compared with computed tomography (CT).

Multi-detector CT (MDCT) with its shorter scan time and increased accuracy has become the gold standard for many indications in trauma imaging. As MDCT has a higher radiation dose, its use should be restricted and carefully indicated especially when dealing with a younger patient population. Careful optimization of imaging parameters has to be performed to minimize exposure and maximize diagnostic safety.

Modern MDCT examinations produce a large number of images, which have to be limited to a reasonable number for interpretation. This review article focuses on optimization of examination protocols and on how to handle the flood of images for viewing and archiving.

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Interessenkonflikt

Der korrespondierende Autor weist auf folgende Beziehung hin: Forschungskooperation des Instituts mit GE Healthcare.

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Correspondence to M. Körner.

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Körner, M., Reiser, M. & Linsenmaier, U. Multidetektor-CT zur Diagnostik traumatologischer Notfälle. Radiologe 49, 510–515 (2009). https://doi.org/10.1007/s00117-008-1807-6

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