Simulation of image formation in x-ray coded aperture microscopy with polycapillary optics.

Area of Science:

• X-ray microscopy
• Optics
• Image processing

Background:

• X-ray coded aperture microscopy with polycapillary optics (XCAMPO) utilizes optic microstructure for depth-resolved imaging.
• Current limitations in resolution and 3D encoding necessitate predictive simulation models.

Purpose of the Study:

• To introduce a novel simulation model for XCAMPO image formation.
• To enable accurate prediction of XCAMPO experimental results for various object positions and optic imperfections.

Main Methods:

• The model treats the polycapillary optics' exit surface as a micro-structured x-ray source.
• Image intensity is calculated using convolution series and fast Fourier transforms.
• Artificial periodicity is employed for simulating non-periodic objects.

Main Results:

• The developed model accurately calculates XCAMPO datasets for diverse experimental configurations.
• Simulations incorporating optic imperfections are feasible.
• Model predictions show good agreement with experimental data.

Conclusions:

• The introduced simulation model is a valuable tool for advancing XCAMPO technology.
• It facilitates improved resolution and the development of 3D encoding procedures.
• This model supports the optimization and understanding of XCAMPO experiments.