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Development of an image reconstruction method based on the detected X-ray fluorescence for sample analysis

Abstract : A new technique that localizes and identifies fluorescing elements in a sample wasdeveloped. This practical imaging modality employs a polychromatic X-ray source toirradiate the sample and prompts the fluorescence emission. Many factors affecting thewhole system like attenuation, sample self-absorption, probability of fluorescence andCompton scattering were taken into account. Then, an effective detection system wasestablished to acquire the optimum fluorescence data and discriminate betweenelements depending on their characteristic fluorescence. This set-up, coupled with anappropriate image reconstruction technique leads to a detailed two-dimensional image.Compared to the conventional image reconstruction techniques, the developedreconstruction method is a statistical technique and has an appropriate convergencetoward an image with acceptable resolution. Moreover, it is a simplified technique thatallows the imaging of many different applications.
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Submitted on : Thursday, May 21, 2015 - 2:27:05 PM
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  • HAL Id : tel-01154253, version 1

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Lara Hamawy. Development of an image reconstruction method based on the detected X-ray fluorescence for sample analysis. Chemical and Process Engineering. Université de Grenoble; Université Libanaise, 2014. English. ⟨NNT : 2014GRENI080⟩. ⟨tel-01154253⟩

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