摘要
目的:探讨团注(Bolus)技术在多层螺旋CT血管成像(multi-slice spiral CT angiography,MSCTA)最佳延迟时间设定中的作用和意义。材料和方法:随机选取患者326例分三组进行比较,第一组87例采取经验值设定延迟时间;第二组109例运用智能跟踪技术启动扫描;第三组130例采取TestBolus技术,根据测得目标血管的时间-密度曲线设定延迟时间。结果:第一组图像质量优22例、良38例、差27例;第二组图像质量优62例、良44例、差3例;第三组图像质量优120例、良8例、差2例;TestBolus技术组图像质量明显优于经验值组,有显著差异(P<0.05);而与智能组,腹主A组无显著差异(P>0.05),优于其余各组(P<0.05)。结论:用Test团注测试扫描技术设定延迟时间能得到优质的CTA原始图像,有利于多层螺旋CT取得更好的三维血管重建图像。
Purpose： To evaluate the clinical application of bolus technique with multi-slice spiral CT for determining the optimal scan delay time in CT angiography. Materials and Methods： MSCTA was performed in 326 patients who were divided randomly into three groups. In group A （87 cases）, an empirical scan delay time was applied; in group B （109 cases）, the scan delay time was determined by Smart Scan Protocol; in the group C （130 cases）, CT scan was performed with a test bolus injection. Results： The ratios of image quality were described as follows： excellent, group A, 25%, B, 57%, C, 92% ; good, group A, 44%, B, 40% ,C, 6% ; bad, group A, 31%, B, 3%, C, 2%, respectively. There was significant difference between the ratios of image quality in group C and group A （ P 〈 0.05 ）. There was significant difference between the ratios of image quality in group C and group B （ P 〈 0.05 ）, except abdominal artery group （ P 〉 0.05 ）. Conclusion： Accurate scan delay time can be determined by using test bolus technique, which can improve the image quality of MSCTA.
出处
《中国医学影像学杂志》
CSCD
2008年第4期259-262,共4页
Chinese Journal of Medical Imaging
关键词
CT
血管造影术
团注技术
延迟时间
multi-slice spiral CT
angiography
bolus technique
delay time
