Detection of colorectal polyps and cancers with air enema MR colonography
10.3321/j.issn:1003-3289.2009.12.028
- VernacularTitle:空气灌肠MR结肠成像检测结、直肠息肉及癌
- Publication Type:Journal Article
- Keywords:
Colon;
Rectum;
Polyp;
Neoplasms;
Magnetic resonance imaging;
Colonography
- From:
Chinese Journal of Medical Imaging Technology
2009;25(12):2246-2249
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the sensitivity of air enema three-dimensional Fourier transform fast spoiled gradient-recalled (FSPGR) MR colonography in the detection of colorectal polyps and cancers. Methods Thirty patients scheduled for optical colonoscopy due to rectal bleeding, positive fecal occult blood test results or altered bowel habits underwent air enema three-dimensional Fourier transform FSPGR MR colonography and optical colonoscopy. Taking optical colonoscopy and histopathological examinations as standards, the sensitivities of air enema three-dimensional Fourier transform fast spoiled gradient-recalled (FSPGR) MR colonography in the detection of colorectal polyps and cancers were statistically analyzed according to the size of lesions. Results Seventy-six colorectal polyps and cancers were detected with optical colonoscopy, including 1-5 mm polyps (n=11), 6-9 mm polyps (n=29) and ≥10 mm polyps and cancers (n=36) in diameter. The detection sensitivity of 1-5 mm polyps, 6-9 mm polyps, ≥10 mm polyps and cancers, ≥6 mm polyps and cancers with MR colonography was 9.09%, 75.86%, 100% and 89.23%, respectively, and the overall detection sensitivity of all sizes colorectal polyps and cancers was 77.63%. Conclusion Detection sensitivity of air enema three-dimensional Fourier transform FSPGR MR colonography is low for 1-5 mm colorectal polyps, good for ≥6 mm polyps and cancers, and excellent for all polyps and cancers ≥10 mm.
