Almost 100 years, ago, Sister M. Beatrice Merrigan took 10 required radiographic films (spanning sinus to knee), answered 20 essay questions, and submitted them to the Registry—known today as ARRT. A few weeks later, she received her exam results and became our first Registered Technologist.

In November 2022, ARRT was honored to mark a century of recognizing qualified people who work in medical imaging, interventional procedures, and radiation therapy. Today we certify and register more than 345,000 technologists in 15 disciplines. 

Want to learn more about how ARRT and the field of radiologic sciences has evolved? 

View A Timeline of Our Profession

View ARRT History Book 1920-2022

View ARRT History Book 1996-2022