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HANDS ON WORKSHOP 1: CT colonography

Abstract

The learning objectives are: (1) to demonstrate in a hands-on training session how computed tomography (CT) colonography datasets are evaluated on a workstation; (2) to emphasize the value of different two-dimensional (2D) and three-dimensional (3D) evaluation strategies for optimal data evaluation; (3) to illustrate the spectrum of common colonic lesions and pitfalls. CT colonography of the cleansed and air-distended colon offers great opportunities for diagnostic imaging of the large bowel. Image interpretation is carried out by means of a commercially available workstation offering 2D and 3D virtual endoscopic images of the colon. CT colonography datasets may be evaluated by a primary 2D or 3D approach. However, both viewing techniques must be available for instant correlation and characterization of suspicious lesions. Findings of the colon are characterized by their morphology, attenuation (and contrast material uptake), and mobility. CT datasets from different CT colonography protocols, either with fecal tagging of stool and fluid or with IV contrast, will be presented. The morphologic appearance of the most common lesions will be highlighted in both techniques. Use of combined 2D and 3D imaging techniques and sound knowledge of the structure and appearance of colonic lesions and pseudolesions will help to improve reader performance and reduce the rate of false positive findings. Practical hands-on training and guided evaluation of proven lesions have been found to be beneficial in CT colonography training.

Author

Wolfgang Schima, Andrea Maier and Thomas Mang

Contact Details

Corresponding address:
Dr Thomas Mang, Universitatsklinik fuer Radiodiagnostik, Medizinische Universitat Wien,
Wahringer Gurtel 18-20, A-1090 Wien, Austria

Reference

ICIS Cancer Imaging Volume 8 Special Issue A
DOI: 10.1102/1470-7330.2008.9023

Date Posted

4 October 2008

Open Access is provided for this article.

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