Heitner, Gabriele Heike: Multiple scattering for diffraction enhanced X-ray imaging. 2005
Inhalt
- Abstract
- Zusammenfassung (D)
- Riassunto (I)
- Contents
- Introduction
- 1 Fundamentals of diffraction enhanced imaging
- 1.1 Absorption versus phase contrast
- 1.2 Diffraction enhanced imaging (DEI)
- 1.3 Multiple scattering: State-of-the-art
- References
- 2 Model for multiple scattering and calculation of multiple scattering power
- 2.1 Model of multiple scattering due to refraction
- 2.2 Calculation of the scattering angle probability distribution for a single scattering event
- 2.2.1 Feasibility study and evaluation of the scattering angle distribution by statistical considerations
- 2.2.2 Scattering power for two different particle geometries
- 2.3 Evaluation of model simulations of single and multiple scattering by using the Monte-Carlo method
- 2.4 Multiple scattering for weakly absorbing microparticles
- 2.4.1 Principles of multiple scattering
- 2.4.2 Calculation of multiple scattering power for randomly distributed scattering particles using the Central Limit Theorem of statistics
- 2.5 Application to soft tissue: Calculations for multiple scattering power of lung tissue
- 2.5.1 Application of lung tissue to the model
- 2.5.2 Prediction of multiple scattering power of lung tissues and alveoli
- 2.6 Considering limits of the model for multiple scattering
- 2.6.1 Influence of absorption on multiple scattering
- 2.6.2 Justifying the approximation of the incident angles in the model for multiple scattering
- 2.6.3 The influence of total external reflection
- References
- 3 Synchrotron Radiation for studying multiple scattering properties - beam lines for DEI experiments
- 4 Simulating nature: Experiments on multi-scattering random distributions and structures
- 4.1 Multiple scattering experiments with randomly distributed microparticles
- 4.1.1 Synthetic specimens to generate variable multiple scattering power
- 4.1.2 Experiments with randomly distributed scattering particles using synthetic specimens
- 4.1.3 Experiments performed with soft tissue: Exposures of a cow lung specimen
- 4.2 Experiments with multi-scattering micro structured particles
- 5 Analysis of multiple scattering properties
- 5.1 Properties of random distribution scattering
- 5.1.1 Determination of the total scattering power for synthetic PMMA sphere specimens
- 5.1.2 Square-root dependence of multiple scattering power on thickness
- 5.1.3 Dependence of multiple scattering power on photon energy
- 5.1.4 Verification of the model of multiple scattering due to refraction for weakly absorbing specimens by experiments with synthetic specimens
- 5.1.5 Experimental determination of the total scattering power of soft tissue
- 5.1.6 Preliminary results and predicting the multiple scattering power of soft tissue: Motivations for new DEI experiments
- 5.1.7 Further quantitative verification of the predicted multiple scattering power for soft tissue
- 5.1.8 Summary
- 5.2 The strong influence of the analyser crystal: A method for designing DEI experiments with multiple scattering, and limitations of the DEI technique
- 5.2.1 Experimental demonstration of the sensitive relat
- 5.2.2 Reconstruction of contrast profiles by Monte-Carlo simulation using the total multiple scattering power
- 5.2.3 Falsification of a refraction signal due to multiple scattering
- 5.2.4 Quantitative reconstruction by simulations using the total scattering power
- 5.2.5 Summary
- 5.2.6 Discussion: Prospective for lung measurements using DEI
- 5.3 Influence of micro-structures on multiple scattering power and verification by Monte-Carlo simulations
- 5.3.1 Qualitative effects of multiple scattering micro-structured specimens
- 5.3.2 Simulation of multiple scattering properties of micro-structures
- 5.3.3 Discussion: DEI as method to detect microstructures?
- References
- References
- 6 Summary and Conclusions
- Acknowledgement