Advancing Label-Free Imaging Through CARS Microscopy: From Signal Formation to Biological Interpretation.

Area of Science:

• Molecular Biophysics
• Biomedical Imaging
• Optical Microscopy

Background:

• Label-free imaging is crucial for observing biological systems without altering them.
• Traditional fluorescence methods can cause artifacts and lack biochemical specificity.
• Coherent Anti-Stokes Raman Scattering (CARS) microscopy uses intrinsic molecular vibrations for imaging.

Purpose of the Study:

• To review the principles and recent advancements in CARS microscopy.
• To highlight CARS's impact on molecular and cellular biophysics.
• To explore future applications of CARS in precision medicine.

Main Methods:

• Utilizes intrinsic vibrational signatures of biomolecules.
• Employs advances in laser technology, detection, and computer analysis.
• Enables chemically specific, real-time imaging.

Main Results:

• CARS microscopy allows visualization of lipids, proteins, and nucleic acids in their native environment.
• It overcomes limitations of fluorescence imaging, such as photobleaching and labeling artifacts.
• CARS has evolved into a versatile tool for basic and applied research.

Conclusions:

• CARS microscopy is a powerful, label-free imaging technique for biophysics and biomedical research.
• Its integration with AI and multimodal approaches promises expanded applications in precision medicine.
• CARS bridges physical sciences and molecular biology for innovative research.