Are you working on your registry for MRI or Sonograpy in the year 2014? The following article may interest you.

https://www.arrt.org/Search.aspx?as_q=competency&num=10&client=google-csbe&output=xml_no_dtd&cx=017652441271239301030:8s_xro6mei4&ie=UTF-8&oe=UTF-8&filter=0&start=10