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About Us

The American Registry of Radiologic Technologists (ARRT) is the world’s largest credentialing organization that seeks to ensure high quality patient care in medical imaging, interventional procedures, and radiation therapy. We test and certify technologists and administer continuing education and ethics requirements for their annual registration.


The ARRT promotes high standards of patient care by recognizing qualified individuals in medical imaging, interventional procedures, and radiation therapy.
Learn about how ARRT works toward its mission.


On November 17, 1922, Sister M. Beatrice Merrigan completed her Radiography exam and later the next month became the country’s first Registered Technologist (R.T.).
Find out more about ARRT’s history.

Our Logo

ARRT’s familiar logo has a split personality: on one hand, it’s an intriguing symbol; on the other, it is a legally protected trademark for use only by the ARRT.
Learn more about the ARRT logo.

Certifications Offered

ARRT certifies and registers individuals in 17 disciplines. Check out the initial certification and registration page for more details, and read on for details on the designation awarded by ARRT.


A 10-member Board of Trustees establishes ARRT policies, including:

Five Trustees are nominated by the American Society of Radiologic Technologists (ASRT) – the national professional membership organization representing all areas of the radiologic sciences; a sixth is nominated from a professional membership society identified by the Board based on its current needs. The remaining four are nominated by the American College of Radiology (ACR) – the principal membership organization of radiologists, radiation oncologists and clinical medical physicists in the United States. Find out more about ARRT’s Board.

Operational Structure

The ARRT Board of Trustees employs an executive director to manage the organization’s operations. The executive director, in turn, hires and manages staff to conduct the business of the ARRT. The more than 70 employees are organized into two divisions:

Credentialing operations includes the following departments: psychometrics, ethics requirements, continuing registration, initial certification, records and government affairs.

Business operations includes the following departments: accounting, human resources, information technology, strategic communications and facility operations.

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