Progress in visualizing turbulent flow using single-echo acquisition imaging.
Progress in visualizing turbulent flow using single-echo acquisition imaging.
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使用单回波采集成像可视化湍流的进展。
DOI：
10.1109/iembs.2006.260797
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
Bosshard,JohnC
中科院分区：
文献类型：
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作者：
Wright,StevenM;McDougall,MaryPreston;Bosshard,JohnC
尽管成像速度有了显着提高，但血流 MRI 仍然是一个具有挑战性的问题。对于周期性流，可以对采集进行门控，使数据采集与流同步。然而，如果流动足够快以至于发生湍流，或者当流动足够快以至于在自旋激励或信号采集期间发生模糊时，则该方法不起作用。本文介绍了采用非常快速的 MR 成像技术、单回波采集成像 (SEA-MRI) 和自旋标记来可视化非常快速和湍流模式的最新进展。演示是在输入流速范围从零到超过 100 厘米/秒的分离通道模型上进行的。自旋标记可以在自旋上放置“纹理”，从而可以清晰地显示复杂的流动模式，并在某些情况下测量流速
MRI of flow remains a challenging problem despite significant improvements in imaging speeds. For periodic flow the acquisition can be gated, synchronizing data acquisition with the flow. However, this method fails to work if the flow is sufficiently fast that turbulence occurs, or when it is sufficiently fast that blurring occurs during the excitation of the spins or the acquisition of the signal. This paper describes recent progress in employing a very fast MR imaging technique, single echo acquisition imaging (SEA-MRI) and spin-tagging to visualize very rapid and turbulent flow patterns. Demonstrations are done on a separating channel phantom with input flow rates ranging from zero to over 100 cm/sec. Spin-tagging enables a "texture" to be placed on the spins, enabling clear visualization of the complex flow patterns, and in some cases measurement of the flow velocity