Scatter analysis and correction for ultrafast X-ray tomography

Scatter analysis and correction for ultrafast X-ray tomography
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超快 X 射线断层扫描的散射分析和校正

DOI:
10.1098/rsta.2014.0396
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发表时间:
2015
期刊:
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
影响因子:
--
通讯作者:
U. Hampel
U. Hampel
中科院分区:
--
文献类型:
--
作者:
M. Wagner;F. Barthel;J. Zalucky;M. Bieberle;U. Hampel

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超快X射线计算机断层成像(CT)是一种在多相流流体力学研究中具有很高潜力的成像技术。为了正确确定这种流的相位分布,重建图像数据的高精度是必要的。在X射线CT中,辐射散射可能导致干扰伪影。由于在标准重建算法中不考虑散射,因此需要额外的方法来校正检测器读数或防止检测到散射光子。在本文中,我们提出了一种分析的散射背景的超快X射线CT成像系统ROFEX在亥姆霍兹Zentrum德累斯顿-罗森多夫,并提出了一种校正技术的基础上准直和确定性模拟的一阶散射。
Ultrafast X-ray computed tomography (CT) is an imaging technique with high potential for the investigation of the hydrodynamics in multiphase flows. For correct determination of the phase distribution of such flows, a high accuracy of the reconstructed image data is essential. In X-ray CT, radiation scatter may cause disturbing artefacts. As the scattering is not considered in standard reconstruction algorithms, additional methods are necessary to correct the detector readings or to prevent the detection of scattered photons. In this paper, we present an analysis of the scattering background for the ultrafast X-ray CT imaging system ROFEX at the Helmholtz-Zentrum Dresden-Rossendorf and propose a correction technique based on collimation and deterministic simulation of first-order scattering.
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发表时间: 1999-11
期刊: Medical physics
影响因子: 3.8
作者:
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