Fresh Blood Imaging of the Peripheral Vasculature: An Emerging Unenhanced MR Technique
Fresh Blood Imaging of the Peripheral Vasculature: An Emerging Unenhanced MR Technique
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DOI：
10.2214/ajr.09.4184
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发表时间：
2010-12-01
影响因子：
5
通讯作者：
Crowe, Paul M.
中科院分区：
文献类型：
--
作者：
Hoey, Edward T. D.;Ganeshan, Arul;Crowe, Paul M.
OBJECTIVE.对不需要施用外源性造影剂的MR血管造影术（MRA）技术的需求日益增加。新鲜血液成像利用ECG门控快速自旋回波序列在心动周期的收缩期和舒张期采集图像。快速收缩期动脉血流与较慢的舒张期血流区分开来，并使用减影技术产生血管造影图像。我们描述了下肢MRA的技术方面，并举例说明了一些样本病例。新鲜血液成像是一种新兴的非增强MRA技术，最近已成为商业可用。早期的临床试验似乎很有希望，预计新鲜血液成像将变得非常宝贵，特别是在肾功能受损的患者中。仍需要进行技术改进以完善这种新型MR应用，特别是用于远端小腿和足血管的评估以及心律失常患者和心功能受损患者的评价。
OBJECTIVE. There is an increasing demand for MR angiography (MRA) techniques that do not require the administration of exogenous contrast material. Fresh blood imaging utilizes an ECG-gated fast spin-echo sequence to acquire images in both the systolic and diastolic phases of the cardiac cycle. Fast systolic arterial flow is differentiated from slower diastolic flow and a subtraction technique is used to produce angiographic images. We describe the technical aspects of performing lower extremity MRA and illustrate some sample cases.CONCLUSION. Fresh blood imaging is an emerging unenhanced MRA technique that has recently become commercially available. Early clinical trials appear promising and it is anticipated that fresh blood imaging will become invaluable, particularly in patients with impaired renal function. Technical refinements are still required to perfect this novel MR application, particularly for the assessment of distal calf and pedal vessels and for the evaluation of patients with arrhythmias and those with impaired cardiac function.