Super cool. Reminds me of Mary Lou Jepsen's (who did One Laptop Per Child) company Openwater, which is using some kinda infrared holography, also as an alternative to MRIs.

Supposedly they can be made lightweight and wearable.

https://www.ted.com/talks/mary_lou_jepsen_how_we_can_use_lig...

https://en.wikipedia.org/wiki/Mary_Lou_Jepsen#Openwater