Share Email Print
cover

Proceedings Paper

CT colonscopy: experience of 100 cases using volumetric rendering
Author(s): Kenneth D. Hopper; Mukul Khandelwal; Christopher Thompson
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Objective: To evaluate the efficacy of Ct colonoscopy for polyp detection using volumetric rendering and comparison to actual colonoscopy. Materials and Methods: 100 patients had CT colonoscopy performed by the same blinded experienced radiologist just prior to their actual colonoscopy. The number of polyps found by both techniques was compared as a function of their pathologically measured size. Complications of both procedures were assessed and ancillary findings found on noncontrast CT were also evaluated for significance. Results: 61 polyps were found by colonoscopy and resected, including 23 which were hyperplastic polyps, 35 tubular adenomas, and 3 villous adenomas. 34 were < 5 mm, 18 5 - 9 mm, and 9 were >= 10 mm in diameter. The sensitivity of CT colonoscopy for < 5 mm polyps was 11.8%, for 5 - 9 mm polyps, 61.1%, and for >= 10 mm, 100%, including the 3 villous adenomas. Evaluating by patient, of the 19 patients who one or more >= 5 mm polyps found by colonoscopy, 17 had polyps identified by CT colonoscopy. The remaining 2 patients with a normal CT colonoscopy had polyps 5 - 9 mm in size. There were no significant complications from CT colonoscopy, but 3 serious complications from actual colonoscopy. CT colonoscopy discovered significant noncolonic pathology in 10 patients. Conclusion: CT colonoscopy performed with volumetric rendering has moderate sensitivity for detecting polyps 5 - 9 mm in size and is highly sensitive for clinically significant polyps >= 10 mm in size.

Paper Details

Date Published: 21 May 2001
PDF: 6 pages
Proc. SPIE 4321, Medical Imaging 2001: Physiology and Function from Multidimensional Images, (21 May 2001); doi: 10.1117/12.428177
Show Author Affiliations
Kenneth D. Hopper, The Pennsylvania State Univ. (United States)
Mukul Khandelwal, The Pennsylvania State Univ. (United States)
Christopher Thompson, The Pennsylvania State Univ. (United States)


Published in SPIE Proceedings Vol. 4321:
Medical Imaging 2001: Physiology and Function from Multidimensional Images
Chin-Tu Chen; Anne V. Clough, Editor(s)

© SPIE. Terms of Use
Back to Top