An iterative method for tomographic x-ray perfusion estimation in a decomposition model-based approach

2010 ◽  
Vol 37 (12) ◽  
pp. 6125-6141 ◽  
Author(s):  
Christoph Neukirchen ◽  
Marco Giordano ◽  
Steffen Wiesner
Keyword(s):  
Iterative Method ◽  
X Ray ◽  
Decomposition Model ◽  
Model Based

A Method for Quantitative Phase Analysis of Silicon Nitride by X-Ray Diffraction

1990 ◽  
Vol 5 (3) ◽  
pp. 121-124 ◽  
Author(s):  
David J. Devlin ◽  
Kamal E. Amin
Keyword(s):  
Silicon Nitride ◽  
Iterative Method ◽  
Calibration Curve ◽  
Quantitative Measurement ◽  
Quantitative Phase Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Pure Phases ◽  
Yttrium Disilicate

AbstractThe relative intensities ratios for the determination of the relative amounts of alpha and beta phases in silicon nitride and the relative amounts of delta yttrium disilicate (Y2Si2O7) and nitrogen apatite [Y5(SiO4)3N] are reported. These constants were determined using an iterative method applicable when the pure phases are not easily prepared. In addition, a calibration curve was obtained for the quantitative measurement of free silicon in silicon nitride over the range 0 to 0.3% by weight of Si.

Comment on “Grazing incidence X-ray fluorescence of periodic structures – a comparison between X-ray standing waves and geometrical optics calculations” by F. Reinhardt, S. H. Nowak, B. Beckhoff, J-C. Dousse and M. Schoengen, JAAS, 2014, 29, 1778

2015 ◽  
Vol 30 (12) ◽  
pp. 2548-2550
Author(s):  
W. Jark ◽  
D. Eichert
Keyword(s):  
Physical Model ◽  
Periodic Structures ◽  
Standing Waves ◽  
Grazing Incidence ◽  
Data Interpretation ◽  
Geometrical Optics ◽  
X Ray ◽  
Model Based ◽  
Published Paper

The data interpretation in the recently published paper with the above title is criticized and it is shown that an alternative more physical model based on diffraction in periodic structures can explain the data better and more consistently.

scholarly journals A Study of Coherent Radiation Generated in an Ablative Capillary Discharge

10.14311/1787 ◽  
2013 ◽  
Vol 53 (2) ◽  
Author(s):  
Jakub Hübner ◽  
Pavel Vrba
Keyword(s):  
Physical Model ◽  
Spontaneous Emission ◽  
Amplified Spontaneous Emission ◽  
Coherent Radiation ◽  
Capillary Discharge ◽  
Mhd Equations ◽  
One Dimensional ◽  
X Ray ◽  
Model Based ◽  
Set Up

Feasible soft-X-ray amplification in the CVI and NVII Balmer transition is investigated in a capillary discharge. The best conditions and parameters for the experimental set-up are found for an ablative capillary. The most optimistic results have shown that the gain would be greater than one, which is the condition for successful ASE (Amplified spontaneous emission) in capillary discharges. The capillary discharge evolution is modeled using the NPINCH program, employing a one-dimensional physical model based on MHD equations. The information about the capillary discharge evolution is processed in the FLY, FLYPAPER, FLYSPEC programs, enabling the population to be modeled on specific levels during capillary discharge.

scholarly journals A dynamic model-based approach to motion and deformation tracking of prosthetic valves from biplane x-ray images

2018 ◽  
Vol 45 (6) ◽  
pp. 2583-2594
Author(s):  
Martin G. Wagner ◽  
Charles R. Hatt ◽  
David A. P. Dunkerley ◽  
Lindsay E. Bodart ◽  
Amish N. Raval ◽  
...  
Keyword(s):  
Dynamic Model ◽  
X Ray ◽  
Model Based ◽  
Prosthetic Valves

Comparison of Different Metrics for Appearance-Model-Based 2D/3D-registration with X-ray Images

2008 ◽  
pp. 122-126 ◽  
Author(s):  
Philipp Steininger ◽  
Karl D. Fritscher ◽  
Gregor Kofler ◽  
Benedikt Schuler ◽  
Markus Hänni ◽  
...  
Keyword(s):  
Appearance Model ◽  
3D Registration ◽  
X Ray ◽  
Model Based
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