Ultrafast contrast-enhanced three-dimensional MR angiography: state of the art.
Ultrafast contrast-enhanced three-dimensional MR angiography: state of the art.
复制标题
超快对比增强三维 MR 血管造影：最先进的技术。
DOI：
10.1148/radiographics.18.2.9536477
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
Herfkens,RJ
中科院分区：
文献类型：
--
作者：
Alley,MT;Shifrin,RY;Pelc,NJ;Herfkens,RJ
超快屏气造影剂增强磁共振（MR）血管造影术可以使用灵活的成像序列进行。利用当前一代的高速成像梯度，可以实现4毫秒或更短的序列重复时间。这些重复时间可以在30秒内获得高分辨率（512 x 512 x 64）图像。这种多功能技术的应用包括主动脉夹层、胸和腹主动脉瘤、肺栓塞、颈动脉狭窄和外周血管疾病的成像。造影剂的给药必须根据检查中的血管解剖结构进行调整，以避免静脉增强。快速的数据采集时间可以用于对多个时间阶段或多个位置进行成像。使用这种技术和T1缩短造影剂，可以在各种血管区域（例如，胸主动脉和腹主动脉、肺动脉、颈动脉、下肢）常规进行高质量MR血管造影。
Ultrafast breath-hold contrast material-enhanced magnetic resonance (MR) angiography can be performed with a flexible imaging sequence. With the current generation of high-speed imaging gradients, it is possible to achieve sequence repetition times of 4 msec or less. These repetition times make it possible to obtain high-resolution (512 x 512 x 64) images in under 30 seconds. Applications of this versatile technique include imaging of aortic dissection, thoracic and abdominal aortic aneurysm, pulmonary embolus, carotid stenosis, and peripheral vascular disease. The administration of contrast material must be tailored to the vascular anatomy under examination to avoid venous enhancement. The rapid data acquisition times can be used to image multiple temporal phases or multiple locations. With this technique and administration of a T1-shortening contrast agent, high-quality MR angiography can be routinely performed in a variety of vascular regions (eg, thoracic and abdominal aorta, pulmonary arteries, carotid arteries, lower extremities).