RT Journal Article SR Electronic T1 An Overview of the Changing U.S. NRC Regulations—10 CFR Part 20 JF Journal of Nuclear Medicine Technology JO J. Nucl. Med. Technol. FD Society of Nuclear Medicine SP 102 OP 106 VO 18 IS 2 A1 Yoshizumi, Terry T. A1 Suneja, Sudhir K. A1 Teal, James S. YR 1990 UL http://tech.snmjournals.org/content/18/2/102.abstract AB