Photothermal optical coherence tomography for 3D live cell detection and mapping

Area of Science:

• Biomedical Optics
• Cell Biology
• Microscopy

Background:

• Confocal microscopy offers limited imaging depth in scattering media.
• Optical Coherence Tomography (OCT) provides depth but lacks cellular contrast.
• Molecular specificity is crucial for studying cells in 3D environments.

Purpose of the Study:

• To demonstrate Photothermal OCT (PT-OCT) for live, nanoparticle-labeled cell imaging in 3D.
• To achieve molecular contrast at OCT imaging scales.
• To enable 3D cell mapping within optically scattering media.

Main Methods:

• Utilized nanoparticle-labeled cells for PT-OCT imaging.
• Performed 3D imaging of live cells.
• Assessed cell viability post-imaging.

Main Results:

• Successfully detected and mapped single live cells in 3D using PT-OCT.
• Demonstrated 3D cell mapping through optically scattering media.
• Confirmed no significant cell death during PT-OCT imaging.

Conclusions:

• PT-OCT provides a viable method for live 3D cell detection and mapping.
• This technique offers molecular contrast complementary to traditional microscopy.
• PT-OCT is valuable for studying cells in native or culture 3D environments.