From what I can tell, the speaker is talking about using red and infrared light along with holograms to perform medical diagnostics. The light travels through your body, the holograms re-organize the photons so that you can understand the information gathered as the light goes out the other side of your body.
The claim is that it’ll be cheaper, less dangerous, less invasive, more portable and higher resolution than other medical scans like MRI. She also talks about how the tools could be used to have 2 way communication with neurons, possibly allowing non-invasive brain/computer interfaces.
Can anyone poke holes in this TED talk? If true, this sounds like it could be a totally new form of medical diagnostic that could be a big deal.