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Area of Science:

Biophysics
Cell Biology
Microscopy

Background:

Fluorescence lifetime sensing provides insights into cellular physicochemical environments.
Fluorescence lifetime imaging microscopy (FLIM) maps cellular biochemistry and dynamic processes.
Conventional FLIM systems have limited acquisition speeds, hindering real-time studies of living cells.

Purpose of the Study:

To present the theoretical basis for developing high-speed single photon counting systems for FLIM.
To demonstrate the implementation of an open-platform hardware and software solution for fast FLIM.
To discuss strategies for balancing precision and accuracy in FLIM data acquisition.

Main Methods:

Development of high-speed single photon counting systems with low dead-times.
Implementation of an open-platform hardware and software for FLIM.
Application of fast FLIM for biochemical imaging in living cells.

Main Results:

Low dead-time systems significantly increase acquisition throughput.
Faster FLIM systems demonstrate improved dynamic range and spatial resolution.
Successful application of fast FLIM for biochemical imaging in living cells.

Conclusions:

Fast FLIM systems, particularly time-domain systems, are poised to increase FLIM adoption in biomedical research.
Innovations in single photon counting enhance FLIM capabilities for studying dynamic biological processes.
Awareness of potential shortcomings and implementation of quality control strategies are crucial for fast FLIM techniques.