结肠息肉的CT结肠成像与结肠镜的对照研究

Comparison of CT colonography and colonoscopy in colon polypus

目的探讨16层CT结肠成像(CTC)在结肠息肉诊断中的临床价值。方法收集行CTC和结肠镜检查的结肠息肉患者56例(共214个息肉),对结肠息肉病例的三维成像方法(SSD、CTVC、PE)分别进行图像质量、病变检出时间、病变检出率等的评价,并与结肠镜比较。结果CT的SSD、CTVC、PE的图像质量均显示满意;病变检出时间CTVC>SSD>PE,PE用时最短,3～5min,明显快于CTVC和SSD像;病变检出率PE>CTVC>SSD,2.0～5.0mm息肉的检出率分别为89.1%、70.3%、37.5%;5.0～10.0mm息肉分别为100%、100%、50.8%;10.0mm以上息肉均为100%。结论16层CT三维成像提高了结肠息肉性病变的检出能力,并将在小息肉的随访复查中发挥巨大潜能。

Objective To discuss the clinical value of 16 slice CT colonography （CTC） in diagnosis of colon polypus. Methods Fifty-six patients with colon polypus （214 polypus） were subjected to perform CTC and colonoscopy. Three-dimensional images （SSD, CTVC, PE） of colon polypus were evaluated based on image quality, detecting time, detecting rate of focus, then compared with colonoscopy. Results SSD, CTVC and PE image quality of CT were satisfied. Detecting time of focus： CTVC〉SSD〉PE. Time of PE was about 3-5 minutes, which was shorter than CTVC and SSD. Detecting rate of focus： PE〉CTVC〉SSD, the detecting rates of PE, CTVC, SSD were 89.1%, 70.3%, 37.5% respectively in 2.0-5.0 mm polypus; 100%, 100%, 50.8% respectively in 5.0-10.0 mm polypus; and 100% in exceeded 10.0 mmpolypus. Conclusion Three-dimensional imaging with 16 slice CT obviously increased the detectable ability of colon polypus. It plays great potential role in the follow-up of small polypus.