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Updated: Dec 11, 2025
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Time-Resolved Fluorescence Anisotropy from Single Molecules for Characterizing Local Flexibility in Biomolecules
Published on: April 25, 2025
779
Extended dynamic range imaging for noise mitigation in fluorescence anisotropy imaging
Paolo Feruglio1,2,3, Claudio Vinegoni4, Ralph Weissleder1
1Massachusetts General Hospital, Harvard Medical School, United States.
Journal of Biomedical Optics
|August 22, 2020
Summary
High dynamic range (HDR) fluorescence anisotropy (FA) imaging significantly reduces noise in FA microscopy. This advancement enables clearer visualization and analysis of molecular behaviors in cellular environments.
Area of Science:
- Biophysics
- Cellular Imaging
- Microscopy Techniques
Background:
- Fluorescence polarization (FP) and fluorescence anisotropy (FA) microscopy are key for studying molecular interactions in vitro and in vivo.
- Current FA microscopy suffers from high noise levels, hindering accurate analysis of fluorescent molecule behavior.
Purpose of the Study:
- To introduce a high dynamic range (HDR)-based FA imaging modality.
- To enhance image quality and signal-to-noise ratio in FA microscopy.
Main Methods:
- Developed an HDR-based FA imaging approach.
- Employed specialized acquisition schemes to extend the dynamic range of FP channels.
Main Results:
- Achieved FA images with a higher signal-to-noise ratio compared to standard methods.
- Demonstrated superior resolution of image features across a wider range of fluorescence intensities and FA values.
Conclusions:
- The HDR-based FA imaging method significantly improves image quality over standard FA microscopy.
- This technique reduces error propagation and is compatible with commercial systems, with potential for other ratiometric imaging modalities.
