Requirements for dynamical differential phase contrast x-ray imaging with a laboratory source.

Area of Science:

• Medical Imaging
• Physics
• Materials Science

Background:

• X-ray phase contrast imaging enhances visualization of weakly-attenuating structures.
• Synchrotron sources facilitate time-resolved imaging and sample dynamics analysis.
• Translating these capabilities to laboratory settings is crucial for broader accessibility.

Purpose of the Study:

• To adapt dynamical differential phase contrast (DDPC) imaging from synchrotron facilities to compact X-ray sources.
• To enable time-sequence imaging and sample dynamics analysis in a laboratory environment.
• To establish guidelines for single-grid, single-exposure DDPC imaging with divergent sources.

Main Methods:

• Development of a single-grid, single-exposure DDPC imaging setup utilizing a divergent X-ray beam.
• Implementation of a liquid-metal-jet X-ray source for rapid imaging.
• Application of noise filtering techniques to enhance image quality from short exposures.

Main Results:

• Successful translation of DDPC imaging to a compact X-ray source, enabling laboratory-based dynamic imaging.
• Achieved exposure times as short as 0.5 seconds for capturing dynamic processes.
• Demonstrated the feasibility of imaging phantoms with improved contrast and reduced noise.

Conclusions:

• Compact X-ray sources can effectively support dynamic phase contrast imaging, expanding its laboratory applications.
• The developed setup and guidelines facilitate the study of sample dynamics with high temporal resolution.
• This work paves the way for more accessible and versatile X-ray imaging of dynamic phenomena.