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Pulsed stimulated Brillouin microscopy enables high-sensitivity mechanical imaging of live and fragile biological specimens

Brillouin microscopy is an emerging optical elastography technique capable of assessing mechanical properties of biological samples in a three-dimensional, all-optical and noncontact fashion. The typically weak Brillouin scattering signal can be substantially enhanced via a stimulated Brillouin scat...

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Main Authors: Yang, Fan (Author) , Bevilacqua, Carlo (Author) , Hambura, Sebastian (Author) , Neves, Ana (Author) , Gopalan, Anusha (Author) , Watanabe, Koki (Author) , Govendir, Matt (Author) , Bernabeu, Maria (Author) , Ellenberg, Jan (Author) , Diz-Muñoz, Alba (Author) , Köhler, Simone (Author) , Rapti, Georgia (Author) , Jechlinger, Martin (Author) , Prevedel, Robert (Author)
Format: Article (Journal)
Language:English
Published: 26 October 2023
In: Nature methods
Year: 2023, Volume: 20, Issue: 12, Pages: 1971-1979
ISSN:1548-7105
DOI:10.1038/s41592-023-02054-z
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1038/s41592-023-02054-z
Verlag, lizenzpflichtig, Volltext: https://www.nature.com/articles/s41592-023-02054-z
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Author Notes:Fan Yang, Carlo Bevilacqua, Sebastian Hambura, Ana Neves, Anusha Gopalan, Koki Watanabe, Matt Govendir, Maria Bernabeu, Jan Ellenberg, Alba Diz-Muñoz, Simone Köhler, Georgia Rapti, Martin Jechlinger & Robert Prevedel
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Summary:Brillouin microscopy is an emerging optical elastography technique capable of assessing mechanical properties of biological samples in a three-dimensional, all-optical and noncontact fashion. The typically weak Brillouin scattering signal can be substantially enhanced via a stimulated Brillouin scattering (SBS) process; however, current implementations require high pump powers, which prohibit applications to photosensitive or live imaging of biological samples. Here we present a pulsed SBS scheme that takes advantage of the nonlinearity of the pump-probe interaction. In particular, we show that the required pump laser power can be decreased ~20-fold without affecting the signal levels or spectral precision. We demonstrate the low phototoxicity and high specificity of our pulsed SBS approach by imaging, with subcellular detail, sensitive single cells, zebrafish larvae, mouse embryos and adult Caenorhabditis elegans. Furthermore, our method permits observing the mechanics of organoids and C. elegans embryos over time, opening up further possibilities for the field of mechanobiology.
Item Description:Gesehen am 18.12.2023
Physical Description:Online Resource
ISSN:1548-7105
DOI:10.1038/s41592-023-02054-z

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