"Therapeutic and diagnostic X rays kill 60000 patients a year in the USA alone."
I don't know where you get your figures from but lumping therapeutic and diagnostic X-rays together is silly.
As you well know, these are very different things.
Therapeutic X-rays are virtually only given for cancer control and the vast majority of deaths are from the original cancer, not the X-rays.
In an authoritative 2004 paper in the Lancet -
http://www.imre.ucl.ac.be/rpr/lancet-363.pdf - the excess lifetime cancer cases from diagnostic X-rays was 700 for the UK and 5695 for the USA - a bit less than your 60,000.
Mac