Simultaneous multislice (SMS) imaging techniques.
Simultaneous multislice (SMS) imaging techniques.
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DOI：
10.1002/mrm.25897
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发表时间：
2016-01
影响因子：
3.3
通讯作者：
Poser BA
中科院分区：
文献类型：
--
作者：
Barth M;Breuer F;Koopmans PJ;Norris DG;Poser BA
采用并行图像重建技术的同步多层成像（SMS）已迅速发展成为一种重要的成像技术。主要的好处是数据采集的加速，等于同时激发的切片的数量。与平面内平行成像不同的是，这种成像方法只有一个边际的固有信噪比损失，并且在固定的回波时间内可以实现完全的加速，这是许多回波平面成像应用所需要的。此外，对于某些实现，SMS技术可以减少射频（RF）功率沉积。在这篇综述中，介绍了SMS成像技术的现状。在引言部分，对MRI中SMS激发的历史进行了历史概述。下一节将介绍射频脉冲的理论背景和实际应用。编码和重建部分展示了如何通过发射器脉冲相位、梯度脉冲以及最重要的是使用多通道接收器线圈来解除折叠的多层图像的纠缠。探讨了经典平行成像技术与SMS重建方法之间的关系。接下来的部分描述了实际实现，包括参考数据的获取和片串扰。在此基础上，综述了SMS成像技术在国内外的应用，并对SMS成像技术进行了展望。中华医学杂志(5):391 - 391,2016。©2015作者。医学磁共振由Wiley期刊公司代表国际共振医学学会出版。
Simultaneous multislice imaging (SMS) using parallel image reconstruction has rapidly advanced to become a major imaging technique. The primary benefit is an acceleration in data acquisition that is equal to the number of simultaneously excited slices. Unlike in‐plane parallel imaging this can have only a marginal intrinsic signal‐to‐noise ratio penalty, and the full acceleration is attainable at fixed echo time, as is required for many echo planar imaging applications. Furthermore, for some implementations SMS techniques can reduce radiofrequency (RF) power deposition. In this review the current state of the art of SMS imaging is presented. In the Introduction, a historical overview is given of the history of SMS excitation in MRI. The following section on RF pulses gives both the theoretical background and practical application. The section on encoding and reconstruction shows how the collapsed multislice images can be disentangled by means of the transmitter pulse phase, gradient pulses, and most importantly using multichannel receiver coils. The relationship between classic parallel imaging techniques and SMS reconstruction methods is explored. The subsequent section describes the practical implementation, including the acquisition of reference data, and slice cross‐talk. Published applications of SMS imaging are then reviewed, and the article concludes with an outlook and perspective of SMS imaging. Magn Reson Med 75:63–81, 2016. © 2015 The Authors. Magnetic Resonance in Medicine Published by Wiley Periodicals, Inc. on behalf of International Society of Medicine in Resonance.