Ultrafast three-dimensional x-ray computed tomography
Ultrafast three-dimensional x-ray computed tomography
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DOI：
10.1063/1.3534806
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发表时间：
2011-01
影响因子：
4
通讯作者：
M. Bieberle;F. Barthel;H.-J. Menz;H. Mayer;U. Hampel
中科院分区：
文献类型：
--
作者：
M. Bieberle;F. Barthel;H.-J. Menz;H. Mayer;U. Hampel
X 射线计算机断层扫描 (CT) 是医学和无损检测领域成熟的可视化技术。然而，由于 CT 扫描需要从不同视角对放射线投影进行采样，因此具有机械移动部件的常见 CT 系统对于动态成像（例如多相流或活体动物）来说速度太慢。在这里，我们介绍了一种基于电子束扫描的超快三维X射线CT方法，其体积速率达到500 s−1。初步实验表明，该方法能够恢复气固和气液两相流中发生毫秒级三维结构变化的相界结构。
X-ray computed tomography (CT) is a well established visualization technique in medicine and nondestructive testing. However, since CT scanning requires sampling of radiographic projections from different viewing angles, common CT systems with mechanically moving parts are too slow for dynamic imaging, for instance of multiphase flows or live animals. Here, we introduce an ultrafast three-dimensional x-ray CT method based on electron beam scanning, which achieves volume rates of 500 s−1. Primary experiments revealed the capability of this method to recover the structure of phase boundaries in gas-solid and gas-liquid two-phase flows, which undergo three-dimensional structural changes in the millisecond scale.