CT colonography using different reconstruction modi.

OBJECTIVE Performing computed tomography (CT) colonography, we compared different reconstruction modi for the detection of colorectal polyps. METHODS The CT data of 48 patients using 16-slice helical CT were analysed in axial slices, virtual-endoscopy and colon-dissection modus. RESULTS The sensitivity (specificity) for the detection of colonic polyps was 94% (80%) if using "colonic-dissection" tool and 89% (80%) if using "virtual-endoscopy" tool. The difference between the virtual endoscopy and colon dissection, considering polyps up to 4.9 mm, was significant. CONCLUSIONS Reconstruction software colon dissection improves the sensitivity of CT colonography.

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