Achromatic approach to phase-based multi-modal imaging with conventional X-ray sources

Area of Science:

• Medical Imaging
• Physics
• Materials Science

Background:

• Conventional rotating anode X-ray sources emit polychromatic radiation.
• Imaging systems must be compatible with broadband X-rays for practical applications.
• Edge-illumination phase-contrast imaging offers enhanced sensitivity to material properties.

Purpose of the Study:

• To investigate the impact of polychromatic radiation on a multi-modal edge-illumination phase-contrast imaging system.
• To evaluate the achromaticity of phase retrieval with broadband X-rays.
• To assess image quality when using energy-resolving detectors with polychromatic sources.

Main Methods:

• Utilized a commercially available energy-resolving single-photon-counting detector.
• Acquired phase-contrast images using broadband X-ray radiation.
• Analyzed the effect of X-ray energy on phase retrieval accuracy.
• Compared experimental results with simulated measurements integrating over the energy spectrum.

Main Results:

• The effect of X-ray energy on phase retrieval was quantified.
• The achromaticity of the edge-illumination phase-contrast method was experimentally demonstrated.
• No significant loss in image quality was observed with polychromatic radiation compared to simulations.
• The imaging system demonstrated consistent performance across typical hard X-ray energies.

Conclusions:

• Multi-modal edge-illumination phase-contrast imaging is compatible with polychromatic X-ray sources.
• The system exhibits near-achromatic behavior, maintaining image quality across a range of X-ray energies.
• This finding supports the use of conventional X-ray sources for advanced phase-contrast imaging applications.