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
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Proceedings ArticleDOI
Hard X-Ray Nanofocusing with Refractive X-Ray Optics: Full Beam Characterization by Ptychographic Imaging
Christian G. Schroer,Florian-Emanuel Brack,Roman Brendler,Susanne Hönig,Robert Hoppe,Jens Patommel,Stephan Ritter,Maria Scholz,Andreas Schropp,Frank Seiboth,Daniel Nilsson,Jussi Rahomäki,Fredrik Uhlén,Ulrich Vogt,Juliane Reinhardt,Gerald Falkenberg +15 more
TL;DR: In this article, the authors used nanofocusing refractive x-ray lenses made of silicon to focus hard x-rays at 8 and 20 keV to (sub-)100 nm dimensions.
Proceedings ArticleDOI
Microbeam production using compound refractive lenses: beam characterization and applications
Christian G. Schroer,Bruno Lengeler,Boris Benner,Til Florian Guenzler,Marion Kuhlmann,Alexandre Simionovici,Sylvain Bohic,Michael Drakopoulos,Anatoly Snigirev,Irina Snigireva,Walter H. Schroeder +10 more
TL;DR: In this paper, the microbeam properties using monochromatic and single undulator harmonic (pink) radiation are discussed, focusing on beam size, depth of field, background, flux, and gain.
Journal ArticleDOI
First experimental result with fluorescent x-ray ct based on sheet-beam geometry
Qingkai Huo,Hidenori Sato,Tetsuya Yuasa,Takao Akatsuka,Jin Wu,Thet-Thet Lwin,Tohoru Takeda,Kazuyuki Hyodo +7 more
TL;DR: In this paper, a sheet incident beam is used to reconstruct the cerebral perfusion of a mouse brain after intravenous injection of 127I-IMP for observing the cerebral flow.
Journal ArticleDOI
Dual-energy fluorescent x-ray computed tomography system with a pinhole design: Use of K-edge discontinuity for scatter correction.
Tenta Sasaya,Naoki Sunaguchi,Thet Thet-Lwin,Kazuyuki Hyodo,Tsutomu Zeniya,Tohoru Takeda,Tetsuya Yuasa +6 more
TL;DR: A pinhole-based fluorescent x-ray computed tomography system with a 2-D detector and volumetric beam that can suppress the quality deterioration caused by scatter components is proposed and improved the contrast-to-noise ratio by more than 2.5.
Journal ArticleDOI
Hard X-ray Microscopy with Elemental, Chemical and Structural Contrast
Christian G. Schroer,P. Boye,J. M. Feldkamp,Jens Patommel,Andreas Schropp,D. Samberg,Sandra Stephan,M. Burghammer,S. Schöder,C. Riekel,Bruno Lengeler,Gerald Falkenberg,Gerd Wellenreuther,Marion Kuhlmann,Ronald Frahm,Dirk Lützenkirchen-Hecht,Walter H. Schroeder +16 more
TL;DR: Hard X-ray microscopy with synchrotron radiation has been extensively studied in the literature as mentioned in this paper, with a focus on scanning microscopy of hard X-rays with refractive lenses.
References
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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.
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