We claim, in this country, to have a respect and concern for health privacy. The doctor-patient relationship is right up there with the client-attorney relationship. But when you go through a scanner, a stranger with no medical training may learn about a health condition that is rightfully your own personal business. Whether this is a scar from a surgery, a medical device implant, an artificial joint, or any number of other possibilities, these scanners can pick them up whether you like it or not.
The health profession has been alerted to the anxiety that can go along with air travel these days for patients with medical conditions. A nurse has published an editorial in her field's professional journal, Urologic Nursing, on this topic.