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Fluorescence Lifetime Macro Imager for Biomedical Applications

Fluorescence Lifetime Macro Imager for Biomedical Applications

Published on: April 7, 2023

Modulated electron-multiplied fluorescence lifetime imaging microscope: all-solid-state camera for fluorescence

Qiaole Zhao¹, Ben Schelen, Raymond Schouten

¹Delft University of Technology, Lorentzweg 1, 2628 CJ, Delft, The Netherlands.

Journal of Biomedical Optics

|January 18, 2013

Summary

Researchers developed a novel all-solid-state camera for frequency-domain fluorescence lifetime imaging microscopy (FLIM). This modulated, electron-multiplied FLIM (MEM-FLIM) camera offers higher resolution and improved image quality compared to traditional systems.

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Area of Science:

Microscopy
Biophotonics
Imaging Technology

Background:

Frequency-domain fluorescence lifetime imaging microscopy (FLIM) traditionally requires image intensifiers.
Existing FLIM systems face limitations in resolution and image quality.

Purpose of the Study:

To develop and evaluate a novel all-solid-state camera for frequency-domain FLIM.
To eliminate the need for image intensifiers in FLIM systems.
To assess the performance characteristics of the new camera.

Main Methods:

Development of a pixel-level modulated, application-specific charge-coupled device camera.
Characterization of camera parameters including noise, dark current, gain, sensitivity, and linearity.
Lifetime measurements on various samples: fluorescein solution, fixed GFP cells, and live GFP-actin stained cells.
Comparison with a conventional microchannel plate (MCP)-based FLIM system.

Main Results:

The novel modulated, electron-multiplied FLIM (MEM-FLIM) camera was successfully built and evaluated.
Experimental characterization confirmed key camera performance metrics.
MEM-FLIM demonstrated superior resolution and image quality compared to MCP-based FLIM.
Successful lifetime measurements were achieved on diverse biological samples.

Conclusions:

The developed MEM-FLIM camera is a viable alternative to conventional FLIM systems.
This technology offers enhanced resolution and image quality for frequency-domain FLIM.
The MEM-FLIM camera presents a new avenue for advanced FLIM applications.