What is the oldest and largest radiologic science professional organization?

The American Society of Radiologic Technologists (ASRT) is recognized as the oldest and largest professional organization specifically focused on radiologic science. Established in 1920, the ASRT has played a pivotal role in advancing the profession by offering education resources, advocating for legislative issues, and establishing standards in practice. This organization is dedicated to supporting radiologic technologists and improving patient care through education and professional development.

In contrast, while the other organizations listed have significant roles in the field of radiologic sciences, they do not have the historical foundation or membership size that ASRT has. The American Registry of Radiologic Technologists (ARRT) is primarily focused on certification and registration for technologists, while the International Society of Radiographers and Radiological Technologists (ISRRT) supports radiographers worldwide with a more global focus. The Radiological Society of North America (RSNA) centers on research and education in imaging and radiology but does not specialize in radiologic technology in the same manner as the ASRT. Thus, ASRT's longstanding commitment and extensive reach in the profession establish it as the oldest and largest organization in radiologic science.