双源CT双能量虚拟平扫对肝脏常见良性病变的诊断价值  

The diagnostic value of dual energy virtual non-contrast images of dual-source CT in the diagnosis of common benign liver diseases

作　　者：刘盼[1,2] 王凤[1] 李邦国[1] 罗显丽 王梦[1] 王荣品[2] 

机构地区：[1]遵义医学院附属医院影像科,563003 [2]贵州省人民医院放射科,550002

出　　处：《实用医学杂志》2017年第9期1435-1438,共4页The Journal of Practical Medicine

基　　金：贵州省科技厅社会发展科技攻关计划项目(编号:黔科合SY字[2013]3038号)

摘　　要：目的:探讨双源CT双能量虚拟平扫(VNC)在诊断肝脏常见良性病变的价值及限度。方法:利用双源CT对226例上腹部病变患者行常规平扫(CNC)及动脉期、门脉期双能量扫描,将门脉期数据经Liv-er VNC软件处理,获得VNC图像。对比分析其中117例肝脏常见良性病变在常规平扫(CNC)及虚拟平扫(VNC)中的检出数量,并比较单能模式与双能模式下的辐射剂量。结果:虚拟平扫检出钙化或结石58个(85.3%)、血管瘤28个(73.6%)低于常规平扫68个(100.0%)、37个(97.3%)(P<0.05);虚拟平扫检出囊肿68个(95.8%)稍高于常规平扫65个(91.5%),检出脂肪肝12例(85.7%)稍低于常规平扫14例(100.0%)(P>0.05);双能模式下CTDI、DLP及ED均低于单能模式,差异有统计学意义(P<0.05)。结论:虚拟平扫对血管瘤、钙化或结石的检出低于常规平扫,对囊肿及脂肪肝的检出无差异。VNC技术可减低CT检查的辐射剂量,具有潜在的临床应用价值。Objective To investigate the diagnostic value and limitations of dual-energy virtual non-contrast images of dual-source CT in common benign liver diseases. Methods Dual-source CT was performed on 226 upper abdomen pathogenesis patients. The conventional non-contrast （CNC） scan was performed with single-energy mode, the arterial phase and portal phase scans were performed with dual-energy mode. The virtual non-contrast （VNC） images were derived from the portal data using liver virtual non-contrast software. 117 patients with common benign liver diseases were retrospectively analyzed in CNC and VNC. The lesion detectability, effective radiation doses for single-energy mode and dual-energy mode were compared. Results Among 117 patients, there were 28 （73.6%） hemangiomas, 58 （85.3%） calcifications or stones in VNC, but the hemangiomas, calcifications or stones in CNC were 37 （97.3%） and 68 （100%）, respectively. The hemangiomas, calcifications or stones in VNC and CNC were significantly different （P 〈 0.05）. The detection of cyst and hepatic steatosis on VNC images were similar as CNC（P 〉 0.05）. The CTDIvol, DLP and ED of dual-energy mode were obviously lower than those of single-energy mode （P 〈 0.05）. Conclusion The detection of hemangiomas, calcifications or stones on VNC images is lower than CNC images. There is no difference in detecting cyst and hepatic steatosis. In addition, radiation dose will be reduced due to adopting VNC.VNC has potential clinical application value.

关 键 词：双源CT 双能量 虚拟平扫 肝脏 辐射剂量 

分 类 号：R575[医药卫生—消化系统] R816.5[医药卫生—内科学]