As reported previously (see here) the technology from Israel’s Vayyar Imaging can see through walls and other materials. Its 4D radar can also detect a patient falling and alerts an emergency contact. Vayyar has just raised $109 million and is opening new offices in Jerusalem and Haifa.
http://nocamels.com/2019/11/4d-imaging-sensor-vayyar-raises-109m-see-through-walls-tech/
https://www.calcalistech.com/ctech/articles/0,7340,L-3774146,00.html