无对比剂增强的磁共振血管成像技术

钆对比剂目前被广泛应用于全身血管磁共振成像,但是由于它在肾功能不全的患者身上可出现肾源性系统性纤维化,基于安全的考虑,无对比剂增强的血管成像技术受到关注。西门子磁共振事业部独家推出的无对比剂磁共振血管成像软件包syngo NATIVE,用以满足客户的临床需求。syngo NATIVE包括两种不同的技术：syngo NATIVE TrueFISP和syngo NATIVE SPACE,前者用于腹部动脉（特别是肾动脉）成像,后者主要用于外周动脉的成像。本文分别对这两种技术的背景以及当前的临床应用进行介绍。

syngo NATIVE:non-contrast-enhanced MR angiography

Gadolinium-based contrast agents have been administrated widely for MR angiography.However,the realization that they may be a factor in the development of nephrogenic systemic fibrosis（NSF） in patients with impaired renal function has created a great interest in the non-contrast-enhanced MR angiography techniques.Siemens syngo NATIVE provides two different non-contrast MR angiography techniques：syngo NATIVE TrueFISP and syngo NATIVE SPACE.The former is optimized for abdomen region,especially the renal arteries and the latter is optimized for peripheral arteries.The purpose of this paper is to introduce the technical background and their current clinical applications.