Interesting, isn't it?
Of course, it could also be that UStechs all over are upset that their gig is up, and now we all know that anyone can buy a machine and administer an ultrasound.
My understanding is there is some concern about exposure to the sonogram. It's not clear, long term, what effects the exposure might be.
Many years ago shoe stores had xray machines as a sales gimmick to show parents that the shoes fit. Who knows how many cases of leukemia were caused by that.