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- W2007478889 abstract "Stochastic distortion of light beams in scattering samples makes in-depth photoexcitation in brain tissue a major challenge. A common solution for overcoming scattering involves adaptive pre-compensation of the unknown distortion1,2,3. However, this requires long iterative searches for sample-specific optimized corrections, which is a problem when applied to optical neurostimulation where typical timescales in the system are in the millisecond range. Thus, photoexcitation in scattering media that is independent of the properties of a specific sample would be an ideal solution. Here, we show that temporally focused two-photon excitation4 with generalized phase contrast5 enables photoexcitation of arbitrary spatial patterns within turbid tissues with remarkable robustness to scattering. We demonstrate three-dimensional confinement of tailored photoexcitation patterns >200 µm in depth, both in numerical simulations and through brain slices combined with patch-clamp recording of photoactivated channelrhodopsin-2. By combining the techniques of temporal focusing and generalized phase contrast researchers are able to preserve the shape of spatial patterns of light deep inside scattering brain slices. This approach is shown to photoactivate the light-sensitive protein channelrhodopsin-2 with single-cell precision and millisecond temporal resolution." @default.
- W2007478889 created "2016-06-24" @default.
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- W2007478889 date "2013-02-17" @default.
- W2007478889 modified "2023-10-18" @default.
- W2007478889 title "Functional patterned multiphoton excitation deep inside scattering tissue" @default.
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- W2007478889 doi "https://doi.org/10.1038/nphoton.2013.9" @default.
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