X-Ray Optics and InstrumentationThis is an RSS file. You can use it to subscribe to this data in your favourite RSS reader, such as GoogleReader, or to display this data on your own website or blog. Subscribe to this data using MyMedWorm.Subscribe to this data using GoogleReader.Subscribe to this data using Bloglines.Subscribe to this data using MyYahoo.

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A Tunable Energy Filter for Medical X-Ray ImagingEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We present the first evaluation of such a filter for medical X-ray imaging. The experimental setup yields a 6.6 gain of flux at 20 keV, and we demonstrate tunability by altering the energy spectrum to center also around 17 and 23 keV. All measurements are found to agree well with ray-tracing and a proposed geometrical model. Compared to a model mammography system with absorption filtering, the experimental MPL filter reduces dose 13–25% for 3–7 cm breasts if the spectrum is centered around the optimal energy. Additionally, the resolution is improved 2.5 times for a 5 cm breast. T...
Source: X-Ray Optics and Instrumentation - June 10, 2009 Category: Physics Source Type: journals

High-Definition X-Ray Fluorescence: ApplicationsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Energy dispersive X-ray fluorescence (EDXRF) is a well-established and powerful tool for nondestructive elemental analysis of virtually any material. It is widely used for environmental, industrial, pharmaceutical, forensic, and scientific research applications to measure the concentration of elemental constituents or contaminants. The fluorescing atoms can be excited by energetic electrons, ions, or photons. A particular EDXRF method, monochromatic microbeam X-ray fluorescence (MμEDXRF), has proven to be remarkably powerful in measurement of trace element concentrations and distributions in a large...
Source: X-Ray Optics and Instrumentation - June 10, 2009 Category: Physics Source Type: journals

Application of Single and Dual Multilayer Optics for Powder X-Ray DiffractionEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The performance of parallel beam multilayer optics, including a parabolic multilayer Osmic MaxFlux GO-13N and a flat custom multilayer, was evaluated experimentally and compared to Bragg-Brentano and traditional ‘‘parallel beam’’ or ‘‘thin film’’ optical geometries. A novel arrangement of a parabolic multilayer in the incident beam with a flat multilayer in the diffracted beam functioning as an analyzer crystal was proven effective for powder diffraction applications. The dual-optic configuration improves resolution while eliminating sample displacement and transparency erro...
Source: X-Ray Optics and Instrumentation - June 10, 2009 Category: Physics Source Type: journals

Direct Fan-Beam Reconstruction Algorithm via Filtered Backprojection for Differential Phase-Contrast Computed TomographyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Recently, a novel data acquisition method has been proposed and experimentally implemented for differential phase-contrast computed tomography (DPC-CT), in which a conventional X-ray tube and a Talbot-Lau-type interferometer were utilized in data acquisition. The divergent nature of the data acquisition system requires a divergent-beam image reconstruction algorithm for DPC-CT. This paper focuses on addressing this image reconstruction issue. We have developed a filtered backprojection algorithm to directly reconstruct the DPC-CT images from acquired fan-beam data. The developed algorithm allows one to directly reconstruct...
Source: X-Ray Optics and Instrumentation - June 10, 2009 Category: Physics Source Type: journals

Collimated Magnetron Sputter Deposition for Mirror CoatingsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We present two different types of collimation optimized for the production of low roughness curved mirrors and flat mirrors, respectively.
Source: X-Ray Optics and Instrumentation - June 10, 2009 Category: Physics Source Type: journals

High Definition X-Ray Fluorescence: Principles and TechniquesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Energy dispersive X-ray fluorescence (EDXRF) is a well-established and powerful tool for nondestructive elemental analysis of virtually any material. It is widely used for environmental, industrial, pharmaceutical, forensic, and scientific research applications to measure the concentration of elemental constituents or contaminants. The fluorescing atoms can be excited by energetic electrons, ions, or photons. A particular EDXRF method, monochromatic microfocus X-ray fluorescence (MμEDXRF), has proven to be remarkably powerful in measurement of trace element concentrations and distributions in a large variety of impo...
Source: X-Ray Optics and Instrumentation - June 10, 2009 Category: Physics Source Type: journals

Custom Hardware Processor to Compute a Figure of Merit for the Fit of X-Ray Diffraction PeaksEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A custom processor based on reconfigurable hardware technology is proposed in order to compute the figure of merit used to measure the quality of the fit of X-ray diffraction peaks. As the experimental X-ray profiles can present many peaks severely overlapped, it is necessary to select the best model among a large set of reasonably good solutions. Determining the best solution is computationally intensive, because this is a hard combinatorial optimization problem. The proposed processors, working in parallel, ...
Source: X-Ray Optics and Instrumentation - June 10, 2009 Category: Physics Source Type: journals

A Tunable Energy Filter for Medical X-Ray ImagingEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We present the first evaluation of such a filter for medical X-ray imaging. The experimental setup yields a 6.6 gain of flux at 20 keV, and we demonstrate tunability by altering the energy spectrum to center also around 17 and 23 keV. All measurements are found to agree well with ray-tracing and a proposed geometrical model. Compared to a model mammography system with absorption filtering, the experimental MPL filter reduces dose 13–25% for 3–7 cm breasts if the spectrum is centered around the optimal energy. Additionally, the resolution is improved 2.5 times for a 5 cm breast. T...
Source: X-Ray Optics and Instrumentation - October 13, 2008 Category: Physics Source Type: journals

High-Definition X-Ray Fluorescence: ApplicationsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Energy dispersive X-ray fluorescence (EDXRF) is a well-established and powerful tool for nondestructive elemental analysis of virtually any material. It is widely used for environmental, industrial, pharmaceutical, forensic, and scientific research applications to measure the concentration of elemental constituents or contaminants. The fluorescing atoms can be excited by energetic electrons, ions, or photons. A particular EDXRF method, monochromatic microbeam X-ray fluorescence (MμEDXRF), has proven to be remarkably powerful in measurement of trace element concentrations and distributions in a large...
Source: X-Ray Optics and Instrumentation - September 30, 2008 Category: Physics Source Type: journals

Application of Single and Dual Multilayer Optics for Powder X-Ray DiffractionEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The performance of parallel beam multilayer optics, including a parabolic multilayer Osmic MaxFlux GO-13N and a flat custom multilayer, was evaluated experimentally and compared to Bragg-Brentano and traditional ‘‘parallel beam’’ or ‘‘thin film’’ optical geometries. A novel arrangement of a parabolic multilayer in the incident beam with a flat multilayer in the diffracted beam functioning as an analyzer crystal was proven effective for powder diffraction applications. The dual-optic configuration improves resolution while eliminating sample displacement and transparency erro...
Source: X-Ray Optics and Instrumentation - July 16, 2008 Category: Physics Source Type: journals

Direct Fan-Beam Reconstruction Algorithm via Filtered Backprojection for Differential Phase-Contrast Computed TomographyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Recently, a novel data acquisition method has been proposed and experimentally implemented for differential phase-contrast computed tomography (DPC-CT), in which a conventional X-ray tube and a Talbot-Lau-type interferometer were utilized in data acquisition. The divergent nature of the data acquisition system requires a divergent-beam image reconstruction algorithm for DPC-CT. This paper focuses on addressing this image reconstruction issue. We have developed a filtered backprojection algorithm to directly reconstruct the DPC-CT images from acquired fan-beam data. The developed algorithm allows one to directly reconstruct...
Source: X-Ray Optics and Instrumentation - July 14, 2008 Category: Physics Source Type: journals

Collimated Magnetron Sputter Deposition for Mirror CoatingsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We present two different types of collimation optimized for the production of low roughness curved mirrors and flat mirrors, respectively.
Source: X-Ray Optics and Instrumentation - July 14, 2008 Category: Physics Source Type: journals

High Definition X-Ray Fluorescence: Principles and TechniquesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Energy dispersive X-ray fluorescence (EDXRF) is a well-established and powerful tool for nondestructive elemental analysis of virtually any material. It is widely used for environmental, industrial, pharmaceutical, forensic, and scientific research applications to measure the concentration of elemental constituents or contaminants. The fluorescing atoms can be excited by energetic electrons, ions, or photons. A particular EDXRF method, monochromatic microfocus X-ray fluorescence (MμEDXRF), has proven to be remarkably powerful in measurement of trace element concentrations and distributions in a large variety of impo...
Source: X-Ray Optics and Instrumentation - July 14, 2008 Category: Physics Source Type: journals

Custom Hardware Processor to Compute a Figure of Merit for the Fit of X-Ray Diffraction PeaksEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A custom processor based on reconfigurable hardware technology is proposed in order to compute the figure of merit used to measure the quality of the fit of X-ray diffraction peaks. As the experimental X-ray profiles can present many peaks severely overlapped, it is necessary to select the best model among a large set of reasonably good solutions. Determining the best solution is computationally intensive, because this is a hard combinatorial optimization problem. The proposed processors, working in parallel, ...
Source: X-Ray Optics and Instrumentation - July 14, 2008 Category: Physics Source Type: journals