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◆ APL Photonics2025-11-01· Nonlinear system

On the importance of simultaneous label-free multimodal nonlinear optical imaging for biomedical applications

Alejandro De la Cadena, Jaena Park, Jindou Shi, Stephen A. Boppart

原始摘要(英文原文)· Original abstract
Label-free nonlinear microscopy offers a powerful tool for the biomedical sciences. It enables investigations of cells and tissues using signals that emerge from endogenous biomolecules and microstructures to derive contrast, thereby preserving the physiological viability and functionality of specimens. Today, the most advanced label-free nonlinear microscopes are multimodal imaging platforms that capitalize on the heterogeneity of biological specimens, capturing not one but many nonlinear signals. Thus, label-free multimodal nonlinear imaging attains a contrast palette with complementary signals, delivering data-rich images that not only allow spatial unmixing and quantification of biochemical species but also unleash the power of correlation analyses and artificial intelligence to extract further information from specimens. In this Perspective, we recap the nonlinear contrast palette and compare the two technological strategies often used to acquire multimodal nonlinear images: a sequential approach vs a simultaneous approach. We then present their strengths and weaknesses and discuss emerging computational strategies that enhance the interpretability of multimodal data.
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