X-ray phase contrast simulation for grating-based interferometry using GATE.

Area of Science:

• Medical Imaging
• Computational Physics
• Optics

Background:

• X-ray phase contrast (XPC) imaging is increasingly important, especially with new compact lab-based systems.
• Monte Carlo (MC) simulations are crucial for optimizing experimental setups and validating new XPC techniques.
• The GATE simulation software, based on Geant4, is widely used for medical imaging but lacks XPC capabilities.

Purpose of the Study:

• To extend the GATE simulation framework with novel physics-based tools specifically for XPC imaging.
• To provide a validated simulation tool for the advancement of XPC imaging research.

Main Methods:

• Developed new physics-based tools integrated into the existing GATE framework.
• Combined MC simulations within GATE to model X-ray interactions in samples.
• Implemented numerical wave propagation techniques using GATE simulation output.

Main Results:

• Successfully extended GATE to support accurate XPC simulations.
• The new tools enable detailed modeling of XPC imaging processes.
• The approach validates MC simulations for XPC applications.

Conclusions:

• The developed GATE extension offers a valuable tool for XPC imaging research.
• This work facilitates the optimization of experimental XPC setups and the development of new acquisition and reconstruction methods.
• It addresses the need for dedicated academic simulation software for XPC imaging.