Development of ultrafast UTE imaging for granular systems
Development of ultrafast UTE imaging for granular systems
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DOI：
10.1016/j.jmr.2016.10.016
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发表时间：
2016-12-01
影响因子：
2.2
通讯作者：
Holland, Daniel J.
中科院分区：
文献类型：
--
作者：
Fabich, Hilary T.;Sederman, Andrew J.;Holland, Daniel J.
超短回波时间（UTE）成像通常用于医学MRI中对“固体”类型的组织进行成像;迄今为止，它尚未广泛用于工程或材料科学，部分原因是需要相对较长的成像时间。在这里，我们展示了如何可以减少UTE的采集时间，使初步研究的流化床，一种类型的反应器，通常用于整个行业包含短11材料，需要快速成像。我们展示了粒子的UTE成像，其11仅为185 μ s，图像采集时间仅为25 ms。图像是使用压缩传感（CS）并利用k空间的埃尔米特对称性获得的，以提高分辨率超过奈奎斯特理论预测的分辨率。该技术是证明通过获得一个和两个模型流化床反应器中的气泡上升的二维图像。(C)2016作者爱思唯尔公司出版
Ultrashort echo time (UTE) imaging is commonly used in medical MRI to image 'solid' types of tissue; to date it has not been widely used in engineering or materials science, in part due to the relatively long imaging times required. Here we show how the acquisition time for UTE can be reduced to enable a preliminary study of a fluidized bed, a type of reactor commonly used throughout industry containing short 11 material and requiring fast imaging. We demonstrate UTE imaging of particles with a 11 of only 185 mu s, and an image acquisition time of only 25 ms. The images are obtained using compressed sensing (CS) and by exploiting the Hermitian symmetry of k-space, to increase the resolution beyond that predicted by the Nyquist theorem. The technique is demonstrated by obtaining one- and two-dimensional images of bubbles rising in a model fluidized bed reactor. (C) 2016 The Authors. Published by Elsevier Inc.