Non-de-scanned parallel recording two-photon hyperspectral microscopy with high spectral and spatial resolution

Area of Science:

• Biomedical Optics
• Microscopy
• Spectroscopy

Background:

• Traditional microscopy techniques often struggle with signal loss and spectral distortion in optically-thick biological tissues.
• Photodamage and crosstalk are significant challenges in high-resolution imaging of intrinsic fluorophores.
• Staining and sectioning procedures can introduce artifacts and alter biological sample characteristics.

Purpose of the Study:

• To construct and characterize a novel two-photon hyperspectral microscope.
• To address limitations of existing microscopy methods, specifically signal loss, spectrum distortion, and photodamage.
• To demonstrate the capability of spectrally resolving intrinsic fluorophores in unstained, unsectioned, optically-thick tissues.

Main Methods:

• Development of a two-photon hyperspectral microscope incorporating non-de-scanned geometry.
• Implementation of a parallel recording scheme to decrease dwell time and reduce photodamage.
• Utilized high spectral and spatial resolution imaging capabilities.

Main Results:

• The constructed microscope achieved low dwell time, high spectral resolution, and high spatial resolution.
• Non-de-scanned geometry significantly reduced signal loss and spectrum distortion.
• Parallel recording effectively decreased dwell time, minimizing photodamage to the sample.

Conclusions:

• The developed two-photon hyperspectral microscope overcomes crosstalk issues inherent in biological imaging.
• The system successfully spectrally resolved intrinsic fluorophores in optically-thick tissues without the need for staining or sectioning.
• This technology offers a powerful tool for label-free, high-resolution imaging of biological samples.