【摘 要】
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X-ray fluorescence microtomography (μXFCT) is a nondestructive analytical technique and has been widely used to nondestructively detect and quantify the elemen
【机 构】
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Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China “,”Universit
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X-ray fluorescence microtomography (μXFCT) is a nondestructive analytical technique and has been widely used to nondestructively detect and quantify the elemental composition and distributions in samples. Usu-ally,synchrotron radiation X-rays are used for μXFCT,due to its high flux density.In this paper,a laboratory-source-based μXFCT system was developed, in which a poly-capillary lens is employed to focus the X-ray beam and improve the flux density. The maximum likelihood expectation maximization algorithm was used to recon-struct the computed tomography slices at a limited number of projections.The experimental results demonstrated that the developed system could reveal the elemental distribu-tion inside the test sample,with an elemental sensitivity of 1000 ppm.
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