Parallel spectroscopic imaging with spin-echo trains
Parallel spectroscopic imaging with spin-echo trains
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DOI：
10.1002/mrm.10495
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发表时间：
2003-07-01
影响因子：
3.3
通讯作者：
Boesiger, P
中科院分区：
文献类型：
--
作者：
Dydak, U;Pruessmann, KP;Boesiger, P
光谱成像（SI）中扫描时间的减少可以通过快速和减少的k空间采样来实现。这项工作提出了一种超快SI技术，结合这两种方法。多重自旋回波（MSE）采集和灵敏度编码（SENSE）的协同作用使高分辨率SI能够在临床可接受的扫描时间内执行。MSE-SENSE-SI的回波链长度范围从一个到四个回波的SNR和空间响应函数通过体外实验进行评估。它示出，每次采集两个自旋回波（SE）产生一个很好的实际的权衡之间的扫描时间，SNR和空间响应。该技术的临床可行性在星形细胞瘤患者中得到了证实，并且使用24 x 24的图像矩阵在2分钟内获得了SI数据。（C）2003 Wiley-Liss，Inc.
A reduction in scan time in spectroscopic imaging (SI) can be achieved by both fast and reduced k-space sampling. This work presents an ultrafast SI technique that combines the two approaches. The synergy of multiple spin-echo (MSE) acquisition and sensitivity encoding (SENSE) enables high-resolution SI to be performed within a clinically acceptable scan time. MSE-SENSE-SI with echo train lengths ranging from one to four echoes is evaluated with respect to SNR and spatial response function by means of in vitro experiments. It is shown that acquiring two spin-echoes (SEs) per acquisition yields a good practical trade-off among scan time, SNR, and spatial response. The clinical feasibility of the technique is demonstrated in a patient with an astrocytoma, and SI data are obtained with an image matrix of 24 x 24 in just over 2 min. (C) 2003 Wiley-Liss, Inc.