Fast volumetric imaging in tissue

Obtaining high resolution images in scattering tissue has been a long-standing challenge in microscopy. This challenge is exacerbated when high frame rates are required, or when 3D imaging is required over extended volumes. I will present several tools we have developed to address this challenge. These can be applied to a variety of microscopy modalities ranging from multiplane imaging with speckle, to multi-focus confocal imaging with targeted illumination, and finally to multiphoton imaging. Our main applications are in-vivo imaging in the mouse brain, where we demonstrate high contrast kHz-rate imaging of neuronal electrical activity and blood flow deep in tissue.