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目的 :探讨注气或气 /碘水双重造影CT扫描 ,描述正常直肠CT的表现及对直肠病变作CT诊断分析的实用性和可靠性。方法 :复习 15例采用此法CT扫描图像并描述正常直肠CT表现 ,分析了其中 8例经直肠镜检取样病理证实之直肠 5种病变 ,及依其各自病理下相应特征CT改变。结果 :正常注气下直肠CT表现是肠管呈圆柱状充气状态 ,管壁呈细线状等密度 ,表现舒张柔和 ,管内空虚 ,内壁光滑 ,外壁与肠周间隙或邻近结构境界清晰。 5种病变依各自相应病理基础均可引起肠腔内、管内外壁及肠周结构相应病理CT表现。结论 :采用此法对直肠作CT诊断分析具有一定实用性和提高诊断可靠性 ,且此法简单易行 ,更适合于基层推广应用。
Objective :To investigate the dual-contrast CT scan of gas injection or gas/iodine water, and to describe the performance of normal rectal CT and the practicality and reliability of CT diagnosis and analysis of rectal diseases. Methods: Fifteen cases were scanned with CT images of this method and CT images of normal rectum were reviewed. Among them, 8 cases of rectal examination confirmed by rectal microscopy and 5 cases of rectal lesions were analyzed, and CT changes according to their respective pathological features. RESULTS: The CT appearance of rectum under normal gas injection was that the bowel was inflated and the wall of the tube was in the form of a thin line with equal density. The performance was diastolic and soft, the tube was empty, the inner wall was smooth, and the boundary between the outer wall and the perinate or adjacent structure was clear. According to their respective pathological basis, the 5 kinds of lesions can cause the corresponding pathological CT manifestations in the intestine, the inner and outer wall of the tube, and the perinuclear structure. Conclusion : This method has certain practicality and reliability in CT diagnosis of rectum. This method is simple and feasible, and is more suitable for grassroots promotion and application.