Mrs JO is in medical imaging and is told to brief patients: "This mammogram X-ray exposes you to no more radiation than a long haul flight".
She asks is this true?
No, it does not appear to be true, at least based on figures I was able to dig up. A typical single long-haul airline flight results in an exposure of about 0.02-0.03 mSv, which is about twenty to forty times less than a typical mammogram at 0.7 mSv. So a single mammogram is probably roughly equivalent to about a year's worth of air travel for a frequent business traveler.