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Fluorescence lifetime imaging microscopy: fundamentals and advances in instrumentation, analysis, and applications
- Source :
- Journal of Biomedical Optics
- Publication Year :
- 2020
- Publisher :
- SPIE-Intl Soc Optical Eng, 2020.
-
Abstract
- Significance: Fluorescence lifetime imaging microscopy (FLIM) is a powerful technique to distinguish the unique molecular environment of fluorophores. FLIM measures the time a fluorophore remains in an excited state before emitting a photon, and detects molecular variations of fluorophores that are not apparent with spectral techniques alone. FLIM is sensitive to multiple biomedical processes including disease progression and drug efficacy. Aim: We provide an overview of FLIM principles, instrumentation, and analysis while highlighting the latest developments and biological applications. Approach: This review covers FLIM principles and theory, including advantages over intensity-based fluorescence measurements. Fundamentals of FLIM instrumentation in time- and frequency-domains are summarized, along with recent developments. Image segmentation and analysis strategies that quantify spatial and molecular features of cellular heterogeneity are reviewed. Finally, representative applications are provided including high-resolution FLIM of cell- and organelle-level molecular changes, use of exogenous and endogenous fluorophores, and imaging protein-protein interactions with Förster resonance energy transfer (FRET). Advantages and limitations of FLIM are also discussed. Conclusions: FLIM is advantageous for probing molecular environments of fluorophores to inform on fluorophore behavior that cannot be elucidated with intensity measurements alone. Development of FLIM technologies, analysis, and applications will further advance biological research and clinical assessments.
- Subjects :
- Paper
Fluorescence-lifetime imaging microscopy
Fluorophore
cell heterogeneity
Computer science
review
Biomedical Engineering
Nanotechnology
Special Section on Selected Topics in Biophotonics: Fluorescence Lifetime Imaging and Optical Micromechanics
Biomaterials
chemistry.chemical_compound
image analysis
fluorescence lifetime
Fluorescence Resonance Energy Transfer
Instrumentation (computer programming)
Fluorescent Dyes
Disease progression
Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials
Förster resonance energy transfer
Energy Transfer
Microscopy, Fluorescence
chemistry
Cellular heterogeneity
microscopy
Preclinical imaging
Subjects
Details
- ISSN :
- 10833668
- Volume :
- 25
- Database :
- OpenAIRE
- Journal :
- Journal of Biomedical Optics
- Accession number :
- edsair.doi.dedup.....e7ac4742d44b3d3dd5c488c496c3691e