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Opt Lett. 2004 Dec 15;29(24):2881-3.

Velocimetric third-harmonic generation microscopy: micrometer-scale quantification of morphogenetic movements in unstained embryos.

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Laboratory for Optics and Biosciences, Centre National de la Recherche Scientifique, Institut National de la Santé et de la Recherche Médicale, Ecole Polytechnique, F-91128 Palaiseau, France.


We demonstrate the association of third-harmonic generation (THG) microscopy and particle image velocimetry (PIV) analysis as a novel functional imaging technique for automated micrometer-scale characterization of morphogenetic movements in developing embryos. Using a combined two-photon-excited fluorescence and THG microscope, we characterize the optical properties of Drosophila embryos and show that sustained THG imaging does not perturb sensitive developmental dynamics. Velocimetric THG imaging provides a quantitative description of the dynamics of internal structures in unstained wild-type and mutant embryos.

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