ULTRA FAST CONTRAST ENHANCED 3D MR ANGIOGRAPHY STATE OF THE ART

引言：这项工作的目标是设计和实现 利用灵活的成像序列实现超快、屏息 增强磁共振血管成像。方法：使用当前 产生高速成像梯度是可能实现的 序列重复时间为4毫秒或更短。这使得有可能 在30秒内获得高分辨率(512x512x)的图像。 这项技术的多功能性将通过以下方式进行演示 应用范围包括主动脉夹层、胸主动脉和胸主动脉 腹主动脉瘤、肺血栓、颈动脉狭窄和 外周血管疾病。我们将讨论政府如何 对比度必须与检查中的血管解剖结构相适应 以避免静脉强化。快速数据采集时间可以是 用于对多个时间阶段或多个空间位置进行成像。 结果/结论：使用这种技术和给药一个 T1缩短型造影剂，可高质量进行MRA检查 在不同的血管区域例行手术。

Introduction: The objective of this work was to design and utilize a flexible imaging sequence for ultra-fast, breath-held contrast-enhanced MR Angiography. Methods: Using the current generation of high speed imaging gradients it is possible to achieve sequence repetition times of 4 ms or less. This make it possible to obtain high resolution (512 x 512 x 64) images in under 30 seconds. The versatility of this technique will be demonstrated with applications including imaging of aortic dissection, thoracic and abdominal aortic aneurysm, pulmonary embolus, carotid stenosis, and peripheral vascular disease. We will discuss how the administration of contrast 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 spatial locations. Results/Conclusions: With this technique and the administration of a T1 shortening contrast agent, high quality MRA examinations can be routinely performed in a variety of vascular regions.