ULTRAFAST INTERLEAVED GRADIENT-ECHO-PLANAR IMAGING ON A STANDARD SCANNER
ULTRAFAST INTERLEAVED GRADIENT-ECHO-PLANAR IMAGING ON A STANDARD SCANNER
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DOI：
10.1002/mrm.1910300512
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发表时间：
1993-11-01
影响因子：
3.3
通讯作者：
MCKINNON, GC
中科院分区：
文献类型：
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作者：
MCKINNON, GC
超快速成像传统上意味着在专门开发的梯度系统上的回波平面成像或在标准磁共振成像扫描仪上的非常短的重复时间梯度回波成像。这里讨论了一种使用传统全身扫描仪进行快速成像的替代策略。该技术是一种混合技术，结合了梯度回波成像和回波平面成像的优点。其在此表示为交错梯度回波平面成像。它不是一个单一的特定测量序列，而是一个连续的序列，其中采用了多个梯度回波的多个激励。这种快速成像方法的优势在于，在成像时间、T2弛豫、梯度功率、分辨率、图像失真和信噪比方面，可以更灵活地优化测量序列。在体内人体心脏图像，在110毫秒，并与2.5毫米的分辨率，已获得与标准的全身扫描仪。
Ultra-fast imaging traditionally implies either echo-planar imaging on specially developed gradient systems or very short repetition time gradient-echo imaging on standard magnetic resonance imaging scanners. An alternative strategy for very fast imaging with conventional whole-body scanners is discussed here. The technique is a hybrid, whereby the advantages of gradient-echo imaging and echo-planar imaging are combined. It is here denoted interleaved gradient-echo-planar imaging. It is not a single specific measurement sequence, but rather a continuum of sequences whereby multiple excitations with multiple gradient-echos are employed. The power of this fast imaging approach is that one has much more flexibility toward the optimization of the measurement sequence with respect to imaging time, T2 relaxation, gradient power, resolution, image distortion, and signal-to-noise ratio. In vivo human heart images, acquired in 110 ms, and with a resolution of 2.5 mm, have been obtained with a standard whole-body scanner.