The following links are valuable sources for those considering a career in Nuclear Medicine Technology.

Board Exams:
ARRT
NMTCB

Accrediting Body and a List of Schools:
National Accreditation through: JRCNMT
Regional (California) Accreditation through: Western Association of Schools and Colleges

Job Outlook:
Bureau of Labor and Statistics 

More Info on NM Technology:
Society of Nuclear Medicine