Pretty impressive development:
http://www.kurzweilai.net/golden-window-wavelength-range-for-optimal-deep-brain-near-infrared-imaging-determined?utm_source=KurzweilAI+Daily+Newsletter&utm_campaign=23bc84c6eb-UA-946742-1&utm_medium=email&utm_term=0_6de721fb33-23bc84c6eb-282199609
Title of the article seems a bit off, but the range of applications of this tech, the scalability, and low cost mentioned all make this interesting and something to watch for!