  An ideal imaging system provides a spatial resolution that is ultimately
dictated by the numerical aperture (NA) of the illumination and collection
optics. In biological tissue, resolution is further affected by scattering
limiting the penetration depth to a few tenths of microns. Here, we exploit the
properties of speckle patterns embedded into a strongly scattering matrix to
generate a high-resolution illumination. Combining adaptive optics with a
custom deconvolution algorithm, we obtain an increase in the transverse spatial
resolution by a factor of 2.5 with respect to the diffraction limit. This
Scattering Assisted Imaging (SAI) is compatible with long working distance
optics and perfectly works on tissue, potentially paving the way to bulk
imaging in turbid samples.
