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Related Concept Videos

Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...

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Beyond Color: Hybrid Vibrational-Electronic Broadband Coherent Anti-Stokes Raman Scattering for Molecularly Informed

Paul Ebersbach1, Jayakrupakar Nallala1, Neil Shepherd2

  • 1Department of Physics and Astronomy, University of Exeter, Exeter EX4 4QL, U.K.

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Broadband coherent anti-Stokes Raman scattering (BCARS) on routine H&E slides creates hybrid spectral contrast. This technique unlocks quantitative molecular data from standard histology, enabling AI-driven histopathology.

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Area of Science:

  • Spectroscopy
  • Histopathology
  • Biomedical Optics

Background:

  • Hematoxylin and eosin (H&E) staining is standard for histology but lacks quantitative molecular information.
  • Conventional Raman and infrared microscopy face limitations like fluorescence and substrate interference on stained tissues.
  • There is a need for methods that extract molecular data from routinely processed histological slides.

Purpose of the Study:

  • To demonstrate broadband coherent anti-Stokes Raman scattering (BCARS) for generating hybrid vibrational-electronic contrast on H&E-stained tissues.
  • To establish a link between histological color and quantitative, machine-readable spectral features.
  • To explore the potential of BCARS for molecular phenotyping and AI-enabled histopathology on archival slides.

Main Methods:

  • Utilized broadband coherent anti-Stokes Raman scattering (BCARS) microscopy on H&E-stained breast tissue microarrays.
  • Employed pixel-wise wavenumber-shift mapping to analyze subnuclear domains.
  • Applied phase-retrieval techniques to separate spectral contributions and used PCA-LDA for nucleus-level cancer discrimination.

Main Results:

  • Generated hybrid vibrational-electronic spectroscopic contrast from coupled Raman vibrations and chromatin-hematoxylin resonances.
  • Resolved subnuclear domains and identified nuclear shrinkage associated with necrosis.
  • Successfully discriminated between ductal carcinoma in situ (DCIS), invasive ductal carcinoma (IDC), and invasive lobular carcinoma (ILC) at the nucleus level.
  • Separated hemalum-associated resonant features from nonpigmented contributions.

Conclusions:

  • Electronically enhanced BCARS on routine H&E slides provides quantitative molecular information, bridging histology and molecular analysis.
  • This technique transforms standard histology slides into sources of rich, machine-readable data.
  • BCARS offers a pathway to unlock archival tissue repositories for advanced molecular phenotyping and AI-driven diagnostics.