Journal ArticleDOI
Reconstructing x-ray fluorescence microtomograms
TLDR
In this article, a self-consistently estimated attenuation of the fluorescence radiation is used to estimate the attenuation inside the sample, which allows one to reconstruct relative concentrations.Abstract:
X-ray fluorescence microtomography allows one to map element distributions inside a sample with high sensitivity and resolutions in the micrometer range. Quantitative reconstruction of the element concentrations from the fluorescence data requires correction for the attenuation inside the sample. However, the attenuation of the fluorescence radiation is not directly accessible by experiment. The method described self-consistently estimates this attenuation and allows one to reconstruct relative concentrations. This is demonstrated on numerical as well as experimental data. A measure for the quality of the reconstruction is given.read more
Citations
More filters
Journal ArticleDOI
Integrated Three-Dimensional Microanalysis Combining X-Ray Microtomography and X-Ray Fluorescence Methodologies
Brecht Laforce,Bert Masschaele,Matthieu Boone,David Schaubroeck,Manuel Dierick,Bart Vekemans,Christophe Walgraeve,Colin R. Janssen,Veerle Cnudde,Luc Van Hoorebeke,Laszlo Vincze +10 more
TL;DR: In this paper, a 3D elemental and morphological analysis approach is presented combining X-ray computed tomography (μCT), Xray fluorescence (XRF) tomography, and confocal XRF analysis in a single laboratory instrument (Herakles), which enables linking the (quantitative) spatial distribution of chemical elements within the investigated materials to their 3D internal morphology/structure down to 1-10 μm resolution level.
Journal ArticleDOI
Joint reconstruction of x-ray fluorescence and transmission tomography
TL;DR: Compared with single-modality inversion based on x-ray fluorescence alone, this joint inversion approach reduces ill-posedness and should result in improved elemental quantification and better correction of self-absorption.
Journal ArticleDOI
Synchrotron radiation techniques for nanotoxicology
Yufeng Li,Jiating Zhao,Ying Qu,Yuxi Gao,Zhenghang Guo,Zuoliang Liu,Yuliang Zhao,Chunying Chen +7 more
TL;DR: In this comprehensive review, the authors outlined the underlying principles of using synchrotron radiation techniques for nanotoxicology studies and also in other scientific fields.
Proceedings ArticleDOI
PyXRF: Python-based X-ray fluorescence analysis package
TL;DR: PyXRF runs single-pixel fitting at a fast speed, which opens up the possibilities of viewing the results of fitting in real time during experiments, and creates an advanced mode for expert users to construct their own fitting strategies with a full control of each fitting parameter.
Posted Content
Analytic Comparison between X-ray Fluorescence CT and K-edge CT
TL;DR: A theoretical analysis in terms of signal-to-noise ratio (SNR) for the two modalities is reported, showing that there is a threshold of GNPs concentration such that XFCT has a better SNR than K-edge CT when GNP concentration is less than this threshold, vice versa.
References
More filters
Journal ArticleDOI
A microscope for hard x rays based on parabolic compound refractive lenses
Bruno Lengeler,Christian G. Schroer,M. Richwin,J. Tümmler,Michael Drakopoulos,Anatoly Snigirev,Irina Snigireva +6 more
TL;DR: In this article, refractive x-ray lenses with a parabolic profile are described, similar to glass lenses for visible light, which can operate in the range from 2 to 50 degrees of freedom, allowing for magnifications up to 50.
Journal ArticleDOI
Fluorescent computer tomography: a model for correction of X-ray absorption
TL;DR: In this article, the authors used the absorption density, measured using conventional absorption tomography, to remove absorption effects and compared the resulting corrected reconstructions with the reconstructions degraded by attenuation efforts.
Journal ArticleDOI
X-ray fluorescent computer tomography with synchrotron radiation
G.-F. Rust,J. Weigelt +1 more
TL;DR: In this paper, the authors describe the possibility of a quantitative calculation of the distribution of a nonradioactive element within a selected cross section with nondestructive methods with the help of X-ray fluorescent tomography (XFCT) in order to increase measurement sensitivity.
Journal ArticleDOI
Synchrotron hard x-ray microprobe: Fluorescence imaging of single cells
Sylvain Bohic,Alexandre Simionovici,A. A. Snigirev,Richard Ortega,Guillaume Devès,Dominique Heymann,Christian G. Schroer +6 more
TL;DR: In this paper, the authors used synchrotron-induced x-ray fluorescence (SXRF) in the hard X-ray range to image trace elements in single cells.
Journal ArticleDOI
High resolution tomography with chemical specificity
TL;DR: In this paper, a very fast method of computerized critical absorption tomography featuring ∼ 10 μm spatial resolution and high chemical sensitivity is described, which is especially suited to investigating small samples.
Related Papers (5)
A new tomographic device based on the detection of fluorescent x-rays
R. Cesareo,Sérgio Mascarenhas +1 more