Publication

Colonic masses: detection with MR colonography

Journal Paper/Review - Aug 1, 2000

Units
PubMed

Citation
Luboldt W, Bauerfeind P, Wildermuth S, Marincek B, Fried M, Debatin J. Colonic masses: detection with MR colonography. Radiology 2000; 216:383-8.
Type
Journal Paper/Review (English)
Journal
Radiology 2000; 216
Publication Date
Aug 1, 2000
Issn Print
0033-8419
Pages
383-8
Brief description/objective

PURPOSE: To assess magnetic resonance (MR) colonography as a method for detection of colorectal masses, with conventional colonoscopy as the reference standard. MATERIALS AND METHODS: MR colonography was performed in 132 patients referred for colonoscopy because of the possible presence of a mass. After rectal filling with a gadopentetate dimeglumine and water enema, T1-weighted three-dimensional gradient-echo MR studies were acquired with the patient in the prone and supine positions. Water-sensitive single-shot fast spin-echo MR images were also obtained. Surface-rendered virtual endoscopic endoluminal views, orthogonal sections in three planes, and water-sensitive MR images were interactively assessed for presence of colorectal masses by two radiologists. RESULTS: MR colonography was well tolerated without sedation or analgesia. MR image quality was sufficient for diagnosis in 127 (96%) patients. Most small (10-mm) lesions were correctly identified. For these large masses, MR colonography had a sensitivity of 93%, specificity of 99%, positive predictive value of 92%, and negative predictive value of 98% for detection of masses. CONCLUSION: MR colonography is a promising modality for help in detecting colorectal mass lesions larger than 10 mm in diameter.