Axially Swept Light-Sheet Microscopy using scattering and fluorescence contrast mechanisms.

Area of Science:

• Biomedical imaging
• Optical microscopy
• Biophysics

Background:

• Light-sheet fluorescence microscopy (LSFM) offers rapid, gentle volumetric imaging.
• Extending LSFM to non-fluorescent contrast, like light-scattering, is desirable.
• Coherent light-sheet illumination causes interference and object-variant point-spread functions in scattering media.

Purpose of the Study:

• To develop a 3D imaging method combining light-sheet illumination with light-scattering.
• To overcome challenges of interference and complex point-spread functions in scattering samples.
• To achieve 3D imaging quality comparable to LSFM using non-fluorescent contrast.

Main Methods:

• Axially swept illumination combined with sparse, strong scatterers.
• Utilizing gold nanoparticles within expanded breast cancer spheroids.
• Leveraging axial sweeping to record both fluorescence and scattered signals.

Main Results:

• Achieved 3D imaging quality comparable to traditional LSFM.
• Demonstrated successful imaging of expanded breast cancer spheroids.
• Successfully recorded both fluorescence and scattered signals using the same setup.

Conclusions:

• Axially swept illumination with scattering enables high-quality 3D imaging.
• This technique expands LSFM capabilities to non-fluorescent contrast mechanisms.
• The method is effective for biological samples like cancer spheroids.