双体位EBCT结肠成像术对结肠隆起性病变的临床应用研究

Clinical application of double position EBCT colonography in the diagnosis of colorectal neoplasms

目的:通过双体位充气结肠EBCT连续容积扫描,探讨EBCT结肠成像技术对结肠隆起性病变的作用和临床应用价值。材料与方法:45例行充气结肠双体位容积扫描,得出数据在工作站中进行CT仿真内窥镜(CTVC)重建、多层面重建(MPR);以结肠镜检查结果为标准,将双体位下CTVC和MPR两种成像技术对结肠隆起性病灶的诊断表现作出分析、评价。结果:双体位下CTVC对病灶的敏感性为100%(病灶≥10mm)和76.2%(5～10mm的病灶);双体位MPR技术对病灶的敏感性为100%(病灶≥10mm)和52.3%(5～10mm的病灶)。结论:EBCT结肠成像术可以准确检出结肠内≥10mm的隆起性病灶;CTVC应作为结肠成像技术中的首选,MPR技术可作为CTVC技术的辅助手段对病灶内部密度、二维形态等作出准确判断。

Objective: The effect and clinical application of EBCT colonography for the diagnosis of colorectal neoplasms are evaluated. Methods: Forty-five patients confirmed by colonoscopy, underwent CT continuous volume scanning in supine and prone positions and the images of CTVC and MPR were achieved in the image workstation. Taking colonoscopy as gold standard, the diagnosis of MPR and CTVC in supine and prone positions for colon neoplasms were analysed and evaluated.Results: In double positions the CTVC sensitivity is 100% for neoplasms≥10mm and 76.2% for neoplasms 5～10mm; in double positions the MPR sensitivity is 100% for neoplasms≥10mm and 52.3% for neoplasms 5～10mm. Conclusion: Neoplasms larger than 10mm can be detected precisely in CT colonography. CTVC should be the primary methods in CT colonography, while MPR could be applied as an ancillary method for CTVC, which can make accurate judgement for internal density of the foci.