双能CT虚拟单能技术在CT血管成像中的应用进展

Application advances of dual energy CT virtual monoenergetic imaging in CT angiography

双能CT(DECT)利用2种不同能级X线生成多种能谱影像集。与常规CT相比,DECT虚拟单能影像(VMI)对于CT血管成像(CTA)不仅有助于增加血管对比度、提高病变检出率、抑制伪影、减少辐射剂量;还可提高CTA影像质量、减少检查失败率,并能更好地显示斑块不同成分、血栓、血管细节和细小分支,有利于引导涉及血管疾病的手术和介入治疗。就VMI技术血管成像相关研究进展及其临床应用进行综述。

Dual energy CT(DECT)produces multiple energy spectrum image sets by using X-ray with two different energy levels.Compared to conventional CT,DECT virtual monoenergetic images(VMI)can enhance contrast between vessels and surrounding structures,improve lesion detection,reduce artifacts,and minimize radiation exposure in CT angiography(CTA).The VMI technique improves the quality of CTA,thereby reducing the failure rate of the examination.Furthermore,the VMI technique allows for better evaluation of plaque components,thrombi,vascular details,and small vessel branches.The advantages of VMI are highly significant for procedures involving blood vessels,including surgical and interventional therapies for vascular diseases.This article reviews the research progress and clinical applications of VMI in vascular imaging.