We had a truly exciting and fruitful meeting on March 3rd for our BRAIN initiative effort. Our collaborators are converging to a couple of very promising approaches to enable transcranial, real time, in vivo imaging of brain network activity. When we first put in this grant, it had the appearance of science fiction, to improve temporal resolution in the in vivo imaging of neurotransmission from minutes in PET imaging, by ~4 orders of magnitude (!), to the scale of 10 milliseconds. But our results are very promising, and suggestive that this is indeed possible.