第二代双源 CT 虚拟平扫对胃癌浆膜面脂肪显示能力的评估  

Virtual non-contrast of the second-generation dual-source CT：the capability to display the adipose tissue of gastric serosa

作　　者：杨丽[1] 时高峰[1] 吴润泽 李杨[1] 蔡晓嘉 

机构地区：[1]河北医科大学第四医院CT室,河北石家庄050011 [2]西门子医疗

出　　处：《实用放射学杂志》2014年第6期947-950,共4页Journal of Practical Radiology

基　　金：河北省高校强势特色学科资助项目（冀教高[2005]52号）;河北省医学科学研究重点课题计划（20100126）.

摘　　要：目的：评价第二代双源 CT（DSCT）虚拟平扫（VNC）对胃癌浆膜面脂肪的显示能力。方法分析经手术证实的48例胃癌患者的 VNC 图像，测量并比较胃周脂肪组织在常规平扫及动、静脉期 VNC 图像中的 CT 值，即真实平扫（TNC）值及 VNC 值。比较浆膜受侵组与未受侵组间胃癌浆膜面脂肪组织 VNC 值的差异。结果胃周脂肪组织的 VNC 值与 TNC 值间的差异有统计学意义（P 〈0.05），其绝对差异值在13 HU 之内。胃癌浆膜受侵组与未受侵组间浆膜面脂肪组织的 VNC 值的差异有统计学意义（P〈0.05）。结论第二代 DSCT 虚拟平扫能清晰显示胃癌浆膜面脂肪组织，对判断浆膜有无受侵具有一定的分辨能力，具有取代常规平扫的可能。Objective To evaluate the capability of virtual non-contrast （VNC）of the second-generation dual-source CT （DSCT）, and to display the adipose tissue of gastric serosa.Methods 48 patients with gastric cancer undergoing preoperative DSCT and surgery were enrolled.The true non-contrast （TNC）values and VNC values of perigastric adipose tissue were measured and compared with conventional non-contrast scanning and VNC of arterial phase and venous phase.The VNC values of perigastric adipose tissue were compared between serosal involvement group and non-serosal involvement group.Results There was statistical difference between TNC values and VNC values of perigastric adipose tissue （P 〈0.05）,the absolute differences were under 13 HU.The difference of VNC values between serosal involvement group and non-serosal involvement group was significant （P 〈0.05）.Conclusion VNC of the second-generation DSCT can clearly display the adipose tissue of gastric serosa.It has certain capability in judging serosal involvement.VNC has the proficiency to replace conventional non-contrast scanning.

关 键 词：计算机体层成像 双能量 虚拟平扫 胃癌 

分 类 号：R814.42[医药卫生—影像医学与核医学] R735.2[医药卫生—放射医学]