Here are some related links that may yield some useful information:

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AHRA Home Page

ASRT Home Page

AuntMinnie.com

Decisions in Imaging Economics

Society of Cardiovascular & Interventional Radiology

American College of Radiology

Maryland Department of Health and Mental Hygiene

American Society for Therapeutic Radiology and Oncology

JRCERT

Mid-Eastern Chapter Society of Nuclear Medicine.

Health Physics Society