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Restoring single-molecule localizations with wavefront sensing adaptive optics for deep-tissue super-resolution imaging

Park, S.; Jo, Y.; Kang, M.; Hong, J. H.; Ko, S.; Kim, S.; Park, S.; Park, H.-C.; Shim, S.-H.; Choi, W.

2021-11-20 cancer biology
10.1101/2021.11.18.469175 bioRxiv
Show abstract

The specimen-induced aberration has been a major factor limiting the imaging depth of single-molecule localization microscopy (SMLM). Here, we report the application of label-free wavefront sensing adaptive optics to SMLM for deep-tissue super-resolution imaging. The proposed system measures complex tissue aberrations from intrinsic reflectance rather than fluorescence emission and physically corrects the wavefront distortion more than three-fold stronger than the previous limit. This enables us to resolve sub-diffraction morphologies of cilia and oligodendrocytes in whole intact zebrafish as well as dendritic spines in thick mouse brain tissues at the depth of up to 102 m with localization number enhancement by up to 37 times and localization precision comparable to aberration-free samples. The proposed approach can expand the application range of SMLM to intact animals that cause the loss of localization points owing to severe tissue aberrations.

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