hundreds of sensors that Christic sensors you get all the signals then you send the data to a computer use your algorithm to form a image someone like x-ray CT image reconstruction but it's actually more sophisticated because it deals with extra dimension so here we're gonna use acoustical lens very much too like lenses like I'm wearing a pair of lenses and everybody has a pair of lenses Eve even if you don't wear glasses right our eyeballs actually have lenses inside as well these are biologically made so here