On 23/08/2014 18:12, harryagain wrote:
....
http://www.medicalnewstoday.com/articles/162170.php


What that says is that individual diagnostic tests are not a problem,
but around 0.2% of patients may have enough of them to reach annual
exposures levels of 50mSv - half the exposure rate where there is any
evidence of (very minimal) risk.

--
Colin Bignell