Stimulated Raman scattering spectroscopic optical coherence tomography

Area of Science:

• Biomedical Optics
• Molecular Imaging
• Spectroscopy

Background:

• Spectroscopic optical coherence tomography (SOCT) provides depth-resolved structural information.
• Stimulated Raman scattering (SRS) microscopy offers high chemical specificity.
• Current imaging techniques often face limitations in speed, sensitivity, or molecular specificity.

Purpose of the Study:

• To integrate SOCT and SRS for simultaneous spatial and spectral imaging.
• To overcome the limitations of individual SOCT and SRS techniques.
• To develop a label-free molecular imaging method with enhanced sensitivity and speed.

Main Methods:

• Integration of spectroscopic optical coherence tomography (SOCT) with stimulated Raman scattering (SRS).
• Development of a multiplexed imaging approach termed SRS-SOCT.
• Application of SRS-SOCT to image excised human adipose tissue.

Main Results:

• Simultaneous spatial and spectral imaging was achieved.
• High sensitivity to endogenous biochemical species was demonstrated.
• Lipid Raman signatures were detected in the high-wavenumber region of adipose tissue.

Conclusions:

• SRS-SOCT enables fast, volumetric, and highly sensitive label-free molecular imaging.
• The combined approach overcomes limitations of individual SOCT and SRS methods.
• SRS-SOCT shows potential for diverse biomedical applications requiring molecular-level tissue analysis.