体层摄影术；X线计算机；图像处理；计算机辅助；内窥镜检查；体

体位对CT仿真结肠镜成像影响的实验研究

http://www.100md.com 《实用医技杂志》 2006年第23期

体层摄影术；X线计算机；图像处理；计算机辅助；内窥镜检查；体位；结肠,,],体层摄影术；X线计算机；图像处理；计算机辅助；内窥镜检查；体位；结肠,1材料和方法,2结果,3讨论,参考文献：

     [摘要] 目的：探讨体位对结肠隆起性病变CT仿真结肠镜(CT virtual colonoscopy,CTVC)成像的影响。方法：取长约20 cm的猪结肠16段，每段制作直径2 mm～10 mm的息肉模型各6个。结肠适度充气并注入1 mm～2 mm高的水后，行螺旋CT扫描。每一肠段均扫描2次，使模拟病灶分别位于近地壁和远地壁上。分析两种位置下CTVC病灶的显示效果和检出率。结果：远地壁上模拟息肉显示效果优于近地壁上(Uc=5.998，P<0.01)；远地壁上模拟息肉检出率高于近地壁上(分别为100%和75%)(χ2=27.43，P<0.01)。结论：多体位扫描提高了结肠隆起性病变的CTVC显示效果和检出率。

    [关键词] 体层摄影术；X线计算机；图像处理；计算机辅助；内窥镜检查；体位；结肠

    The Experimental Study of CT Virtual Colonoscopy;Effect of Scanning In Both the Supine and Prone Positions

    XU Hui,ZHAO Meng,WANG Shuzhi，WANG Liping, LU Lingshuan, GU Jianping

    (Department of Radiology,the Affiliated Nanjing No.1 Hospital of Nanjing Medical University,Nanjing， Jiangsu 210006，China)

    Abstract:Objective To evaluate the effectiveness of CT virtual colonoscopy for colorectal masses in both the supine and prone positions.Methods Sixteen approximately 20cmlong sections of fresh pig colon were resected as experimental model with 6 artificial mass lesions ranging from 2mm to 10mm in diameter per section.Spiral scanning was performed after appropriately distended by introduction of air and water.Each section was scanned twice.Simulated polyps were located the distal and proximal wall alternatively to study the imaging effect and detection rate in two positions.Results The imaging effect of the distal wall was better than that of the proximal wall(uc=5.998 ......

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