Real-time quantitative elemental analysis and mapping: microchemical imaging in cell physiology.

Area of Science:

• Cell Biology
• Microscopy
• Biophysics

Background:

• Microcomputer advancements enable digital X-ray map acquisition and processing of cells.
• Quantitative X-ray elemental mapping provides insights into cellular composition.

Purpose of the Study:

• To describe a microcomputer system for acquiring and processing quantitative X-ray elemental maps.
• To enable real-time imaging and analysis of element and water content in cellular regions.
• To facilitate studies in cell physiology and pathophysiology.

Main Methods:

• Utilizing a graphics-based microcomputer for spectrally filtered X-ray elemental image map acquisition.
• Fitting X-ray maps to standards and correcting for specimen drift in real-time.
• Acquiring high-resolution quantitative energy-dispersive X-ray images of freeze-dried cryosections.
• Obtaining low-dose quantitative bright-field images of frozen-hydrated sections.
• Implementing static probe acquisition with on-line spectral processing and quantification.
• Developing unified software for both on-line and off-line data processing and analysis.

Main Results:

• Real-time acquisition and processing of X-ray elemental image maps are feasible.
• Simultaneous acquisition of element and water content from the same intracellular regions is possible.
• Computer-aided imaging combined with static probes serves as an interactive tool for biological analysis.

Conclusions:

• The developed microchemical microscopy system enhances studies of ionic (elemental) compartmentation.
• Facilitates investigation of intracellular concentration gradients and cellular responses to stimuli.
• Enables ultrastructural resolution of fast physiological events and cell-to-cell interactions.