16-MDCT仿真内窥镜检查猪结肠模拟息肉的实验研究  

Experimental study of simulated polyps in pig colon:detection with 16-MDCT virtual endoscopy

作　　者：马巍 赵贵辛 王啸 冯艳丽 林均会 朱海波 

机构地区：[1]辽宁省朝阳市第二医院,辽宁朝阳122000

出　　处：《中国临床医学影像杂志》2007年第2期126-129,共4页Journal of China Clinic Medical Imaging

摘　　要：目的:探讨16层螺旋CT仿真内窥镜检查10mm以下不同大小的猪结肠模拟息肉的敏感性以及充气压力的选择。方法:猪结肠40cm24段。每段制作1～2mm、3～4mm、5～6mm、7～8mm、9～10mm息肉模型5枚。24段猪结肠随机分为A、B、C3组,每组8段。3组分别注入37.5mmHg、52.5mmHg、67.5mmHg压力的气体。每段猪结肠均行3个角度扫描,即猪结肠纵轴与扫描架平面成0°、45°、90°角。结果:不同角度、压力下息肉检出的敏感性较高,没有显著性差异。仅在气压为37.5mmHg时1～2mm的息肉检出的敏感性为75.0%,其它均为100%。结肠充气的3种压力37.5mmHg与52.5mmHg和67.5mmHg之间,结肠袋深距有显著性差异,52.5mmHg与67.5mmHg之间无显著性差异。结论:16层螺旋CT对1～2mm、3～4mm、5～6mm、7～8mm、9～10mm的息肉检出有较高的敏感性。建议52.5mmHg的气压应作为CT仿真内窥镜充气的首选压力。CT扫描时应始终维持这个压力,直到扫描结束。Objective： To access the ability and the optimal gas pressure of 16-MDCT virtual endoscopy in detection of simulated polyps with different sizes in pig colon. Methods： Twenty-four pieces of 40cm-long colon were divided into 3 groups randomly with the gas pressure of 37.5, 52.5 and 67.SmmHg. Each piece of colon had 5 simulated polyps with the size 1-2mm, 3-4mm, 5-6mm, 7-8mm and 9-10mm. All the pieces of colon underwent CT scanning with the angle of 0°, 45° and 90° to the gantry. Results： There was no significant difference for MDCT in detection of the polyps under different pressures and with different angles. Their sensitivities were all 100% except for the 1-2mm polyps detected under 37.SmmHg with the sensitivity of 75%. The depths of the colonic haustra were different under the above pressures, but there was no difference between 52.SmmHg and 67.SmmHg. Conclusion： The sensitivity of 16-MDCT virtual endoscopy in detection of polyps with the size ranged from 1 to 10mm is high. The optimal gas pressure is 52.SmmHg and it should be kept until the scanning is finished.

关 键 词：结肠息肉 结肠镜检查 计算机体层摄影 模型 动物 猪 

分 类 号：R574.62[医药卫生—消化系统] B814.42[医药卫生—内科学]