syngo TWIST——动态时间分辨的MR血管造影技术

syngo TWIST for dynamic time-resolved MR angiography

三维动态增强磁共振血管成像由于无创性、假阳性率低等优点,具有很高的诊断价值和临床意义;但是常规的血管动态增强扫描存在扫描延迟时间估算欠准确、动脉时相容易受静脉污染的缺点。西门子推出的syngoTWIST技术通过操作k-空间覆盖方式来提高扫描速度,同时兼容并行成像技术实现了比其他动态扫描方法更高的时间和空间分辨率。使用该方法无需判断造影剂到达峰值的时间,可以获得无任何静脉污染的动脉时相,并且减少增强剂的使用量。本文阐述了syngo TWIST技术的基本原理以及最基本的临床应用,展示了该技术在血管疾病评估等领域的广阔应用前景。

With the advantages of non-invasion,low false positive rate and so on,3D dynamic contrast-enhanced MRA has been recognized as one MR technique with high diagnostic value and clinical significance.But for conventional contrastenhanced MRA,it is hard to estimate the time of delayed scanning after contrast injection and eliminate the venous contamination.syngo TWIST technique launched by Siemens achieves significant improvements in temporal and spatial resolution by manipulating the k-space coverage and using in combination with parallel imaging.With syngo TWIST,there is no need to judge the time to peak after contrast injection.We can completely eliminate the venous contamination and use smaller amounts of contrast agent.In this paper,the underlying principles and initial clinical applications for syngo TWIST will be presented which shows the potential to be applied in the assessment of vascular disease..