terahertz imaging, or perhaps multispectral imaging from cell frequencies, 2.4GHz and 5.8GHz wifi? that stuff goes through walls. and if we can get a THz emitt

terahertz imaging, or perhaps multispectral imaging from cell frequencies, 2.4GHz and 5.8GHz wifi? that stuff goes through walls. and if we can get a THz emitter in the range of affordability, that'd be a neat way to get realtime 3d scans of environments.