Diagnostic Performance of CT Colonography for the Detection of Colorectal Polyps.
- Author:
Ji Young YUN
1
;
Hee Jeong RO
;
Jong Beom PARK
;
Jung Bin CHOI
;
Ji Eun CHUNG
;
Yong Jin KIM
;
Won Hyuck SUH
;
Jong Kyun LEE
Author Information
- Publication Type:Original Article ; Evaluation Studies
- Keywords: Colon, CT; Colon neoplasm; Computed tomography (CT) colonography; Virtual colonoscopy
- MeSH: Adult; Aged; Aged, 80 and over; Colonic Polyps/*diagnosis; Colonography, Computed Tomographic/*methods; Colonoscopy/methods; Colorectal Neoplasms/*diagnosis; Contrast Media/administration & dosage; False Negative Reactions; False Positive Reactions; Follow-Up Studies; Humans; Image Processing, Computer-Assisted; Imaging, Three-Dimensional; Iohexol/analogs & derivatives/diagnostic use; Middle Aged; Observer Variation; Predictive Value of Tests; Radiographic Image Enhancement/methods; Retrospective Studies; Sensitivity and Specificity
- From:Korean Journal of Radiology 2007;8(6):484-491
- CountryRepublic of Korea
- Language:English
- Abstract: OBJECTIVE: To investigate the diagnostic value of CT colonography for the detection of colorectal polyps. MATERIALS AND METHODS: From December 2004 to December 2005, 399 patients underwent CT colonography and follow-up conventional colonoscopy. We excluded cases of advanced colorectal cancer. We retrospectively analyzed the CT colonography findings and follow-up conventional colonoscopy findings of 113 patients who had polyps more than 6 mm in diameter. Radiologists using 3D and 2D computer generated displays interpreted the CT colonography images. The colonoscopists were aware of the CT colonography findings before the procedure. RESULTS: CT colonography detected 132 polyps in 107 of the 113 patients and conventional colonoscopy detected 114 colorectal polyps more than 6 mm in diameter in 87 of the 113 patients. The sensitivity of CT colonography analyzed per polyp was 91% (41/45) for polyps more than 10 mm in diameter and 89% (101/114) for polyps more than 6 mm in diameter. Thirteen polyps were missed by CT colonography and were detected on follow-up conventional colonoscopy. CONCLUSION: CT colonography is a sensitive diagnostic tool for the detection of colorectal polyps and adequate bowel preparation, optimal bowel distention and clinical experience are needed to reduce the rate of missing appropriate lesions.
