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闭塞性结肠直肠癌(occlusive colorectal carcinoma,OCC)是指结肠远段或直肠的癌致肠腔狭窄,纤维结肠镜不能通过,又未产生肠梗阻者。为了评价术前CT仿真结肠镜(virtual colonoscopy,VCS)在检查癌灶近侧结肠中的作用,作者对29例(男16例,女13例,年龄46～83岁)经纤维结肠镜发现的OCC患者做了VCS检查。检查在纤维结肠镜后3小时内进行,螺旋CT扫描参数:110mA,110kV,层厚5mm,螺距1.25,矩阵512×512。可能时一次屏气扫描全部结肠,重建图像时间距2mm,层面重叠
Occlusive colorectal carcinoma (OCC) refers to the colon or distal rectal cancer caused by intestinal stenosis, colonoscopy can not pass, but also did not produce intestinal obstruction. To evaluate the role of preoperative CT virtual colonoscopy (VCS) in examining the proximal colon of the foci, the authors identified 29 patients (16 males and 13 females aged 46-83 years) with fibro-colonoscopy OCC patients did VCS examination. Check in the fiber colonoscopy within 3 hours after spiral CT scan parameters: 110mA, 110kV, layer thickness 5mm, pitch 1.25, matrix 512 × 512. When possible, breath-hold scan of all colon, image reconstruction time 2mm, level overlap