Chinese Physics C > 2015, Vol. 39 > Issue(3): 038203 DOI: 10.1088/1674-1137/39/3/038203

Attenuation correction ofL-shell X-ray fluorescence computed tomography imaging

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Abstract：
X-ray Fluorescence Computed Tomography (XFCT) is a widely-used experimental technique for investigating 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.

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[1]

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LIU Long, HUANG Yang, XU Qing, YAN Ling-Tong, LI Li, FENG Song-Lin and FENG Xiang-Qian. Attenuation correction of L-shell X-ray fluorescence computed tomography imaging[J]. Chinese Physics C, 2015, 39(3): 038203. doi: 10.1088/1674-1137/39/3/038203

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Received: 2014-04-28
Revised: 2014-08-16

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通讯作者:陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Attenuation correction ofL-shell X-ray fluorescence computed tomography imaging

Corresponding author:FENG Xiang-Qian,

Received Date:2014-04-28

Accepted Date:2014-08-16

Available Online:2015-03-05

Abstract:X-ray Fluorescence Computed Tomography (XFCT) is a widely-used experimental technique for investigating 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.

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Attenuation correction ofL-shell X-ray fluorescence computed tomography imaging

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