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目的评价空气灌肠三维Fourier变换快速扰相梯度回波(FSPGR)序列MR结肠成像检测结直肠息肉及癌的灵敏度。方法对30例因便血、大便隐血试验阳性或大便习惯改变而拟接受光学结肠镜检查者进行空气灌肠三维Fourier变换FSPGR序列MR结肠成像及光学结肠镜检查。以光学结肠镜及组织病理学检查为标准,按息肉及癌的大小统计分析MR结肠成像检测结直肠息肉及癌的灵敏度。结果光学结肠镜共检出76枚结直肠息肉及癌,其中1~5 mm息肉11枚、6~9 mm息肉29枚、≥10 mm息肉及癌36枚。MR结肠成像对1~5 mm息肉、6~9 mm息肉、≥10 mm息肉及癌、≥6 mm息肉及癌的检测灵敏度分别为9.09%、75.86%、100%及89.23%,总体检测灵敏度为77.63%。结论空气灌肠三维Fourier变换FSPGR序列MR结肠成像对1~5 mm结直肠息肉检测灵敏度低,但对≥6 mm息肉及癌的检测灵敏度较高,并能够检出全部≥10 mm的息肉及癌。
Objective To evaluate the sensitivity of three-dimensional Fourier transform fast scrambling gradient echo (FSPGR) sequence MR imaging in detecting colorectal polyps and cancers. Methods Thirty patients with colposcopy, colonoscopy and colonoscopy were enrolled in this study. Three patients were enrolled in this study. To colonoscopy and histopathological examination as the standard, according to the size of polyps and cancer statistical analysis of MR colonography colorectal polyps and cancer sensitivity. Results A total of 76 colorectal polyps and cancers were detected by optical colonoscopy, of which 11 were polyps from 1 to 5 mm, 29 from 6 to 9 mm polyps, and 36 were polyps and cancers ≥ 10 mm. The sensitivity of MR colonography was 9.09%, 75.86%, 100% and 89.23% for 1 ~ 5 mm polyp, 6 ~ 9 mm polyp, ≥ 10 mm polyp and carcinoma, ≥ 6 mm polyp and carcinoma respectively. The overall detection sensitivity was 77.63%. Conclusion The airway enema with three-dimensional Fourier transform FSPGR sequence MR colonography is less sensitive to 1 ~ 5 mm colorectal polyps detection, but it is more sensitive to ≥ 6 mm polyps and cancers, and can detect all ≥ 10 mm polyps and cancers.