Polychromatic X-ray effects on fringe phase shifts in grating interferometry

Area of Science:

• Physics
• Materials Science
• Biomedical Imaging

Background:

• Quantitative phase imaging requires monochromatic fringe phase shifts.
• Grating interferometry with incoherent X-ray sources yields polychromatic fringe phase shifts.
• Extracting monochromatic information from polychromatic data is challenging.

Purpose of the Study:

• To develop a novel analytic approach for directly computing monochromatic fringe shifts from polychromatic fringe shifts.
• To provide a tool for accurate quantitative phase imaging in various scientific fields.

Main Methods:

• Proposed a new analytic method to process fringe phase shifts.
• Validated the approach using numerical simulations of grating interferometry setups.

Main Results:

• The analytic approach successfully computes monochromatic fringe shifts directly from polychromatic fringe shifts.
• The method is validated across various grating interferometry configurations.

Conclusions:

• The developed analytic method offers a direct and efficient way to obtain monochromatic fringe shifts.
• This technique enhances quantitative imaging capabilities in biomedical and material science.