Stain-free histopathology by programmable supercontinuum pulses.

Area of Science:

• Biomedical Optics
• Pathology Imaging
• Cancer Research

Background:

• Histological imaging is the gold standard for disease diagnosis but is labor-intensive.
• Current methods involve tissue processing, staining, and visualization, which can be time-consuming and may alter cellular features.

Purpose of the Study:

• To introduce a novel optical imaging platform for label-free multimodal multiphoton microscopy.
• To demonstrate the potential for stain-free molecular histopathology in clinical settings.

Main Methods:

• Utilized a unique photonic crystal fiber source for programmable supercontinuum pulses.
• Employed label-free multimodal multiphoton microscopy for optical signature collection.
• Applied the platform to fresh ex vivo mammary tissue samples.

Main Results:

• Successfully collected optical signatures of the tumor microenvironment, including mesoscopic biological organization.
• Detected evidence of tumor cell migration and (lymph-)angiogenesis.
• Acquired cellular and extracellular features largely absent in traditional histology.

Conclusions:

• The developed platform offers a stain-free approach to molecular histopathology.
• This technology has the potential to be translated into routine clinical use for disease diagnosis.
• Label-free imaging provides enhanced molecular and structural information compared to traditional methods.