Whole-field five-dimensional fluorescence microscopy combining lifetime and spectral resolution with optical...

Area of Science:

• Biophotonics
• Microscopy
• Spectroscopy

Background:

• Fluorescence lifetime imaging microscopy (FLIM) is a powerful technique for biological imaging.
• Traditional FLIM systems can suffer from artifacts affecting lifetime determination.
• Multispectral imaging offers potential for improved specificity and reduced artifacts.

Purpose of the Study:

• To develop a novel whole-field three-dimensional (3-D) fluorescence lifetime imaging microscope.
• To integrate multispectral imaging capabilities for five-dimensional (5-D) data acquisition.
• To demonstrate the benefits of spectral discrimination and optical sectioning in FLIM.

Main Methods:

• Development of a whole-field 3-D FLIM instrument.
• Incorporation of multispectral imaging for 5-D data acquisition.
• Utilizing diode-pumped solid-state laser technology for a compact and cost-effective system.

Main Results:

• The developed microscope can acquire 5-D data sets in under a minute.
• Spectral discrimination and optical sectioning were shown to minimize artifacts in lifetime measurements.
• Improved lifetime contrast in biological tissue was achieved through spectral discrimination.

Conclusions:

• The novel 5-D fluorescence microscope offers rapid and artifact-minimized imaging.
• Multispectral FLIM enhances the analysis of biological tissues.
• The system's design based on diode-pumped solid-state lasers suggests potential for wider adoption.