The purposes of the ACR are to advance the science of radiology, improve radiologic service to the patient, study the socioeconomic aspects of the practice of radiology, and encourage improved and continuing education for radiologists and allied professional fields.

The American Society of Radiologic Technologists is the oldest and largest national professional association for technologists in the radiologic sciences.

The ARRT was founded in 1922 for the purpose of recognizing individuals qualified in the safe and effective application of x rays for medical purposes.

The American Registry of Diagnostic Medical Sonographers® (ARDMS®) is an independent, nonprofit organization in operation to administer examinations and award credentials in the areas of diagnostic medical sonography, diagnostic cardiac sonography, vascular technology and ophthalmic biometry.

The Society of Nuclear Medicine is an international scientific and professional organization founded in 1954 to promote the science, technology and practical application of nuclear medicine.

Search Engine for radiology-themed websites

The National Osteoporosis Foundation (NOF) is one of the leading sources of information about osteoporosis and bone measurements.