The mission of the American Society of Radiologic Technologists (ASRT) is to advance and elevate the medical imaging and radiation therapy profession and to enhance the quality and safety of patient care.
Created by WebMD, eMedicine's radiology page features up-to-date, searchable, peer-reviewed resources. Requires registering for a free account to use.
The FDA's resource page for Radiography contains information for professionals as well as links to the laws, regulations, and performance standards for radiology.
Radiopaedia is an online encyclopedia for radiology. It is a good starting place for research, but can be edited by anyone, making it less reliable than some other sources.