Fluorescence imaging in vivo: recent advances.

Area of Science:

• Biomedical imaging
• Optical imaging
• Molecular imaging

Background:

• In vivo fluorescence imaging utilizes sensitive cameras to detect fluorophore emissions in living small animals.
• Near-infrared (NIR) fluorophores, such as indocarbocyanine dyes, are preferred to overcome photon attenuation in living tissues.
• The development of NIR probes expands with organic, inorganic, and biological nanoparticles.

Purpose of the Study:

• To review recent advances in in vivo fluorescence imaging strategies and reporter techniques.
• To highlight novel approaches for improving probe specificity, affinity, and signal amplification.
• To discuss emerging developments in high-resolution, multimodality, and lifetime-based imaging.

Main Methods:

• Utilizing near-infrared fluorophores for enhanced tissue penetration.
• Developing novel imaging strategies and reporter techniques.
• Exploring advanced probe designs including nanoparticles.
• Implementing signal modulation and amplification at target sites.

Main Results:

• Improved probe specificity and affinity for enhanced imaging.
• Enhanced sensitivity through signal modulation and amplification.
• Growing diversity of NIR probes, including nanoparticles.
• Emerging capabilities in high-resolution, multimodality, and lifetime imaging.

Conclusions:

• In vivo fluorescence imaging is advancing rapidly with new probes and strategies.
• Enhanced sensitivity and resolution are key goals for future developments.
• The field is moving towards more sophisticated imaging techniques for biological research.