CT-Kolonographie: Diagnostik kolorektaler Polypen und Tumoren

Zusammenfassung

Frühzeitige Erkennung und Therapie des kolorektalen Karzinoms sind unverzichtbare Grundlagen, um die hohe Mortalität zu senken. Die sog. CT-Kolonographie wird im zunehmenden Maße als mögliche alternative Untersuchungsmethode zum Nachweis von kolorektalen Polypen und Karzinomfrühformen betrachtet. Der folgende Beitrag liefert neben dem klinischen Hintergrund einen Überblick über die Durchführung einer CT-Kolonographie einschließlich in der Praxis erprobter Untersuchungsprotokolle. Insbesondere Patientenvorbereitung sowie Verarbeitung der Bilddaten und deren Interpretation werden erläutert. Weiterhin werden der derzeitige Stellenwert, Indikation sowie Vor- und Nachteile dieser Methode beleuchtet.

Abstract

Early recognition and therapy of the colorectal carcinoma are an indispensable basis to lower the high mortality. The so-called CT colonography is increasingly regarded as a possible alternative method to find colorectal polyps and early forms of colorectal cancer. In addition to a review of the clinical background, the following article provides an overview of how to perform CT colonography including clinically established examination protocolls. In particular, patient preparation as well as the processing of the imaging data and their interpretation are described. Furthermore, present role and indications as well as advantages and disadvantages of this method are discussed.

Key words

Colon, CT; - Colon neoplasms, CT; - Intestinal neoplasms, diagnosis; - Cancer screening; - Contrast media

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