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Quantitative analysis of a micro array anode structured target for hard x-ray grating interferometry
Guibin Zan1,2,3, David John Vine2, Wenbing Yun2
1National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, People's Republic of China.
Physics in Medicine and Biology
|December 25, 2019
Summary
Talbot-Lau interferometry (TLI) uses a novel x-ray source for enhanced phase contrast imaging. Optimal MAAST source parameters were determined using Monte Carlo simulations, revealing electron beam incidence angle is critical.
Area of Science:
- Medical Imaging
- Physics
- X-ray Technology
Background:
- Talbot-Lau interferometry (TLI) offers advanced contrast modes beyond conventional absorption radiography.
- TLI is a key method for achieving x-ray phase contrast, compatible with high-power sources.
- Micro array anode structured target (MAAST) sources present advantages for TLI, especially above 30 keV.
Purpose of the Study:
- To determine optimal parameters for a MAAST x-ray source for TLI applications.
- To investigate the impact of electron beam incidence angle on MAAST source performance for TLI.
Main Methods:
- Monte Carlo simulations were employed to model x-ray production within the MAAST source.
- Simulations analyzed the spatial distribution and quantity of x-rays generated.
Main Results:
- The study found that both the spatial distribution and number of x-rays produced are highly dependent on the electron beam's incidence angle.
- MAAST sources offer improved flux and field of view for TLI, particularly at higher x-ray energies.
Conclusions:
- The incidence angle of the electron beam is a critical parameter for optimizing MAAST source performance in TLI.
- MAAST x-ray sources show significant potential for advancing TLI applications, especially in high-energy imaging.
