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- W3164644785 abstract "Significance: Histopathological analysis of tissues is an essential tool for grading, staging, diagnosing and resecting cancers and other malignancies. Current histopathological techniques require substantial sample processing prior to staining with hematoxylin and eosin (H&E) dyes, to highlight nuclear and cellular morphology. Sample preparation and staining is resource-intensive and introduces potential for variability during sample preparation. Aim: We present a novel method for direct label-free histopathological assessment of formalin fixed paraffin embedded tissue blocks and thin tissue sections using a dual contrast photoacoustic remote sensing (PARS) microscopy system. Approach: To emulate the nuclear and cellular contrast of H&E staining, we leverage unique properties of the PARS system. Here the ultraviolet excitation of the PAARS microscope takes advantage of DNA's unique optical absorption to provide nuclear contrast analogous to hematoxylin staining of cell nucelli. Concurrently, the optical scattering contrast of the PARS detection system is leveraged to provide bulk tissue contrast analogous to eosin staining of cell membranes. Results: We demonstrate the efficacy of this technique by imaging human breast tissue and human skin tissues in formalin fixed paraffin embedded tissue blocks and frozen sections respectively. Salient nuclear and extra-nuclear features such as cancerous cells, glands and ducts, adipocytes, and stromal structures such as collagen. Conclusions. The presented dual contrast PARS microscope enables label-free visualizations of tissue with contrast and quality analogous to the current gold standard for histopathological analysis. Thus, the proposed system is well positioned to augment existing histopathological workflows, providing histological imaging directly on unstained tissue blocks and sections." @default.
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- W3164644785 date "2021-05-25" @default.
- W3164644785 modified "2023-10-03" @default.
- W3164644785 title "Single acquisition label-free histology-like imaging with dual-contrast photoacoustic remote sensing microscopy" @default.
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- W3164644785 doi "https://doi.org/10.1117/1.jbo.26.5.056007" @default.
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