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- Title
Colon dissection: a new three-dimensional reconstruction tool for computed tomography colonography.
- Authors
Röttgen, R.; Fischbach, F.; Plotkin, M.; Herzog, H.; Freund, T.; Schröder, R. J.; Felix, R.; Röttgen, R; Schröder, R J
- Abstract
<bold>Purpose: </bold>To improve the sensitivity of computed tomography (CT) colonography in the detection of polyps by comparing the 3D reconstruction tool "colon dissection" and endoluminal view (virtual colonoscopy) with axial 2D reconstructions.<bold>Material and Methods: </bold>Forty-eight patients (22 M, 26 F, mean age 57 +/- 21) were studied after intra-anal air insufflation in the supine and prone positions using a 16-slice helical CT (16 x 0.625 mm, pitch 1.7; detector rotation time 0.5 s; 160 mAs und 120 kV) and conventional colonoscopy. Two radiologists blinded to the results of the conventional colonoscopy analyzed the 3D reconstruction in virtual-endoscopy mode, in colon-dissection mode, and axial 2D slices.<bold>Results: </bold>Conventional colonoscopy revealed a total of 35 polyps in 15 patients; 33 polyps were disclosed by CT methods. Sensitivity and specificity for detecting colon polyps were 94% and 94%, respectively, when using the "colon dissection", 89% and 94% when using "virtual endoscopy", and 62% and 100% when using axial 2D reconstruction. Sensitivity in relation to the diameter of colon polyps with "colon dissection", "virtual colonoscopy", and axial 2D-slices was: polyps with a diameter >5.0 mm, 100%, 100%, and 71%, respectively; polyps with a diameter of between 3 and 4.9 mm, 92%, 85%, and 46%; and polyps with a diameter < 3 mm, 89%, 78%, and 56%. The difference between "virtual endoscopy" and "colon dissection" in diagnosing polyps up to 4.9 mm in diameter was statistically significant.<bold>Conclusion: </bold>3D reconstruction software "colon dissection" improves sensitivity of CT colonography compared with the endoluminal view.
- Subjects
COLON surgery; DISSECTION; TOMOGRAPHY; POLYPS; TUMORS; ENDOSCOPY; COLON (Anatomy); COMPARATIVE studies; DIGITAL image processing; RESEARCH methodology; MEDICAL cooperation; RESEARCH; THREE-dimensional imaging; EVALUATION research; VIRTUAL colonoscopy; RESEARCH bias; COLON polyps
- Publication
Acta Radiologica, 2005, Vol 46, Issue 3, p222
- ISSN
0284-1851
- Publication type
journal article
- DOI
10.1080/02841850510020996