磁共振团注追踪技术测定门静脉血流的评价  

Evaluation of MR Bolus Tracking Technique in Measuring Portal Vein Flow

作　　者：郑卫权[1] 张雪林[1] 周华[1] 林志春[1] 商雪林[1] 李景山[1] 罗武[1] 闫慧敏[1] 

机构地区：[1]第一军医大学南方医院影像中心

出　　处：《临床放射学杂志》2003年第3期207-209,共3页Journal of Clinical Radiology

摘　　要：目的　探讨磁共振团注追踪技术 (bolustrackingtechnique ,BTT)的原理及其临床应用价值。资料与方法选择 10例正常志愿者 ,利用BTT测量门静脉主干的血流峰值流速、流量和流向 ,并与彩色多谱勒超声测量结果作对照 ,评价该方法测量的准确性。结果　BTT法测量正常志愿者空腹门静脉主干的血流平均峰值流速为 14.66±4.0 6cm/s,平均单位时间峰值流量为 10 5 5 .40± 63 2 .95ml/min ,与彩色多谱勒结果的相关系数为 0 .90 9,P =0 .697,在统计学上 ,两者无显著性差异。所有血流均为向肝流向。结论　磁共振BTT是一种无损伤、准确地测量血管内血流流速。Objective To explore the principle of MR bolus tracking technique (BTT) and its value in clinical practice.Materials and Methods With BTT, the peak velocity, flow volume and direction in main portal vein were measured in 10 healthy volunteers. The accuracy was evaluated by comparing the results of BTT with that of Duplex sonography.Results The average peak velocity and peal flow capacity for average unit time in main portal vein measured by BTT was 14.66±4.06cm/s and 1055.40±632.95ml/min, respectively. Compared with Duplex sonography, the correlation coefficient was 0.909 (P=0.697). No statistically significant difference existed between BTT and Duplex sonography. The flow direction was hepatopetal in all cases.Conclusion MR bolus tracking technique is an accurate and non-invasive method for the measurement of the blood velocity, flow capacity and direction in blood vessels.

关 键 词：成像 团注追踪技术 门静脉 血流动力学 NMR 

分 类 号：R445.2[医药卫生—影像医学与核医学]