低剂量宝石能谱CT结肠成像在检测结肠息肉中的可行性研究  

The feasibility study of low-dose gem energy spectrum CT colonography in the diagnosis of colonic polyps

作　　者：李家言[1] 何欣[1] 黄增超[1] 刘熙荣[1] 廖海[1] 袁文昭[1] 张锡流[1] 袁捷[1] 韦兰珍 黄乔统[1] 

机构地区：[1]广西中医药大学第一附属医院放射科,南宁530023

出　　处：《中国临床新医学》2014年第6期501-503,共3页CHINESE JOURNAL OF NEW CLINICAL MEDICINE

基　　金：广西卫生厅科研课题(编号:Z2013168)

摘　　要：目的探讨低剂量宝石能谱CT结肠成像(CTC)在检测结肠息肉中的可行性。方法对50例疑似结肠息肉患者行低剂量宝石能谱CTC及内镜检查,以内镜结果作为金标准,计算低剂量宝石能谱CTC检测结肠息肉的符合率,并记录扫描的CT剂量指数(CTDIw)。结果内镜诊断结肠息肉阴性12例,阳性38例;低剂量宝石能谱CTC诊断结肠息肉阴性16例,阳性34例;共发现79个息肉。对于≥0.5 cm的息肉,低剂量宝石能谱CTC的符合率为91.07%,<5 mm的息肉符合率为50%。结论辐射剂量降低至1.01 mGy的宝石能谱CTC检测≥0.5 cm的息肉,与内镜有较高的符合率。Objective To explore the feasibility of low doses of gem energy spectrum CT colonography （ CTC） in detecting polyps of the colon .Methods A total of 50 patients with suspected colonic polyps underwent low-dose gem energy spectrum CTC and endoscopy .The colonic polyps were observed by endoscopy and gem energy spectrum CTC,with the endoscopic finding as gold standard .The coincidence was evaluated for colonic polyps by the gem energy spectrum CTC ,and calculated CT dose index （ CTDIw） in prone was recorded .Results Thirty-eight pa-tients were diagnosed to have colonic polyps by endoscopy and 12 were negative ,the CTC negative diagnosis of colonic polyps in 16 cases and positive 34 cases.Total 79 polyps in 50 patients were found by CTC .For polyp size≥0.5 cm and 〈0.5 cm, the compliance was 91.07%, and 50.00%,respectively.Conclusion Reduction of the effective dose to 1.01 mGy significantly affects images quality on gemstone energy spectrum CTC ,but the perception of ≥0.5 cm lesion not significantly impaired .

关 键 词：结肠成像 X线计算机体层摄影术 辐射剂量 结肠息肉 

分 类 号：R445[医药卫生—影像医学与核医学]