ARRT Radiation Therapy Certification Exam
The Radiation Therapy certification demonstrates a radiation therapist’s advanced knowledge and competence in performing radiation therapy procedures. This certification is offered by the American Registry of Radiologic Technologists (ARRT).
Exam Content
The ARRT Radiation Therapy certification exam covers three main content categories:
Patient Care
This section focuses on patient assessment, preparation, and management, as well as radiation safety and protection specific to radiation therapy.
Treatment Planning
This section covers principles of treatment planning, including dose calculation, treatment plan evaluation, and quality assurance.
Treatment Delivery
This section assesses your knowledge of various radiation therapy procedures and the use of equipment, including simulation, treatment setup, and delivery.

Exam preparation
To prepare for the ARRT Radiation Therapy Certification Exam, review the exam content specifications provided by the ARRT, utilize study materials such as textbooks, review courses, and practice exams, and consider participating in study groups or online forums.
Passing Score
The ARRT Radiation Therapy exam uses a scaled scoring system, with a passing score of 75. The actual number of correct answers needed to pass may vary slightly depending on the specific exam version.
Eligibility Criteria
To become eligible for the Radiation Therapy certification exam, candidates must meet the following criteria:
a. Hold a current ARRT registration in Radiography, Nuclear Medicine Technology, or Sonography.
b. Complete an ARRT-approved structured education program in Radiation Therapy, which covers specific content areas outlined by the ARRT.
c. Complete the required clinical experience in radiation therapy, as specified by the ARRT. This includes performing and documenting a variety of radiation therapy procedures.

Exam Format
The ARRT Radiation Therapy certification exam consists of approximately 200 multiple-choice questions, with a time limit of 4 hours. The exam is administered on a computer at Pearson VUE testing centers.
Application process
To apply for the Radiation Therapy certification exam, submit an application form to the ARRT, along with documentation of your structured education and clinical experience. You will also need to pay the required exam fee.
Certification Maintenance
Once you obtain your Radiation Therapy certification, you will need to renew it every two years. This involves completing 24 Continuing Education (CE) credits related to your field and adhering to the ARRT’s Standards of Ethics.
State licensure
Depending on your state’s regulations, you may need additional licensure or registration to practice as a radiation therapist. Check with your state’s licensing board for specific requirements.
