Attenuation correction of L-shell X-ray fluorescence computed tomography imaging

X-ray Fluorescence Computed Tomography （XFCT） is a widely-used experimental technique for inves- tigating the spatial distribution of elements in a sample. However, image reconstruction for this technique is more difficult than for transmission tomography, one problem being self-absorption. In this...

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Veröffentlicht in:	Chinese physics C 2015-03, Vol.39 (3), p.107-112
1. Verfasser:	刘珑黄旸徐清闫灵通李丽冯松林冯向前
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Sprache:	eng
Schlagworte:	Attenuation Computation Density Maximization Spatial distribution Tomography X-ray fluorescence X射线荧光实验技术断层摄影术期望最大化校正衰减计算机断层成像计算机断层扫描
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description	X-ray Fluorescence Computed Tomography （XFCT） is a widely-used experimental technique for inves- tigating the spatial distribution of elements in a sample. However, image reconstruction for this technique is more difficult than for transmission tomography, one problem being self-absorption. In this work, we make use of known quantities and unknown density of elements of interest to express unknown attenuation maps. The attenuation maps are added to the contribution value of the pixel in the Maximum Likelihood Expectation Maximization （MLEM） reconstruction method. Results indicate that the relative error is less than 14.1%, which shows that this method can effectively correct L-shell XFCT.
doi_str_mv	10.1088/1674-1137/39/3/038203
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subjects	Attenuation Computation Density Maximization Spatial distribution Tomography X-ray fluorescence X射线荧光实验技术断层摄影术期望最大化校正衰减计算机断层成像计算机断层扫描
title	Attenuation correction of L-shell X-ray fluorescence computed tomography imaging
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