Integrated photoacoustic and fluorescence confocal microscopy

Area of Science:

• Biomedical optics
• Medical imaging
• Microscopy

Background:

• Studying tumor vasculature and microenvironments requires advanced imaging techniques.
• Existing methods often lack the resolution or simultaneous contrast needed for comprehensive analysis.

Purpose of the Study:

• To develop and demonstrate a dual-modality imaging system integrating optical-resolution photoacoustic microscopy (OR-PAM) and fluorescence confocal microscopy (FCM).
• To achieve simultaneous acquisition of optical absorption and fluorescence contrast with intrinsic spatial registration.

Main Methods:

• Integrated OR-PAM and FCM using a shared laser source and objective lens.
• Acquired intrinsically registered photoacoustic and fluorescence images in a single scan.
• Utilized micrometer resolution for imaging microvasculature.

Main Results:

• Demonstrated simultaneous photoacoustic angiography and fluorescence lymphangiography.
• Achieved micrometer resolution imaging of blood and lymphatic vessels, including capillaries.
• Presented a novel method for in vivo imaging of tumor angiogenesis and vasculature.

Conclusions:

• The developed dual-modality system provides enhanced capabilities for studying tumor biology.
• Simultaneous optical absorption and fluorescence imaging offers comprehensive insights into tumor vasculature and microenvironments.
• This integrated approach advances in vivo microscopic imaging for biomedical research.