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by SEJeff 1012 days ago
Tomographic detection has been around for some time. There was a company that commercialized this and had a more or less real-time Harry Potter style “Marauder’s Map” of your home for a security system but they did a lousy job commercializing it.

See a crappy demo of the Xandem solution: https://youtu.be/0lnfOnZD6d8?si=1QqIO0mvHsP4mj5n

Their Xandem home product was fantastic, though failed commercially due to the price.