Compact x-ray microtomography system for element mapping and absorption imaging.

Area of Science:

• X-ray imaging and tomography
• Materials science
• Biomedical imaging

Background:

• X-ray microtomography systems are crucial for non-destructive analysis.
• Existing systems may lack portability or versatility for diverse applications.
• The need for compact, multi-modal X-ray diagnostic tools is increasing, especially for remote environments like space.

Purpose of the Study:

• To design and construct a compact X-ray microtomography system.
• To enable both element mapping and absorption imaging.
• To assess the system's suitability for space-based X-ray diagnostics.

Main Methods:

• Utilized scanning fluorescence tomography for element distribution analysis.
• Employed full-field transmission microtomography for 3D structural imaging.
• Integrated a low-power microfocus X-ray tube with a polycapillary optic for microbeam generation.

Main Results:

• Achieved element mapping and 3D absorption imaging capabilities in a single compact system.
• Demonstrated fluorescence microtomography with a 16-micrometer microbeam for element distribution in plant samples.
• Showcased 3D imaging of a rat humerus with ~10-micrometer resolution using transmission tomography.

Conclusions:

• The developed compact X-ray microtomography system offers a versatile solution for multi-modal imaging.
• The system's design is appropriate for X-ray diagnostics in space applications.
• Combined fluorescence and transmission tomography provides comprehensive sample characterization.