Radiation Therapists
Also called: Computed Tomography Simulation Therapist (CT Simulation Therapist), Dosimetrist, Radiation Oncology Registered Nurse (Radiation Oncology RN), Radiation Therapist (RT), Radiation Therapy Technician, Radiation Therapy Technologist (RTT), Radiologic Therapist, Radiology Therapist
Provide radiation therapy to patients as prescribed by a radiation oncologist according to established practices and standards.
What radiation therapists do
Typical tasks
- Position patients for treatment with accuracy, according to prescription.
- Administer prescribed doses of radiation to specific body parts, using radiation therapy equipment according to established practices and standards.
- Follow principles of radiation protection for patient, self, and others.
- Review prescription, diagnosis, patient chart, and identification.
- Conduct most treatment sessions independently, in accordance with the long-term treatment plan and under the general direction of the patient's physician.
- Enter data into computer and set controls to operate or adjust equipment or regulate dosage.
- Check radiation therapy equipment to ensure proper operation.
- Observe and reassure patients during treatment and report unusual reactions to physician or turn equipment off if unexpected adverse reactions occur.
- Educate, prepare, and reassure patients and their families by answering questions, providing physical assistance, and reinforcing physicians' advice regarding treatment reactions or post-treatment care.
- Maintain records, reports, or files as required, including such information as radiation dosages, equipment settings, or patients' reactions.
- Check for side effects, such as skin irritation, nausea, or hair loss to assess patients' reaction to treatment.
- Prepare or construct equipment, such as immobilization, treatment, or protection devices.
Typical path into the job (BLS)
Radiation Therapists salary
The median annual wage for radiation therapists is $105,310 (BLS OEWS May 2025; BLS Employment Projections 2025–35, national). The lowest 10 percent earn less than $80,560 and the highest 10 percent earn more than $156,710. The mean annual wage is $114,990.
The mean hourly wage of $55.00 is 7.6× the federal minimum wage of $7.25. State minimums are higher in most large states. Minimum wage by state →
How does your pay compare with people your age?
Your numbers are not sent or stored. The comparison uses this occupation's BLS wage percentiles, adjusted for age with BLS median weekly earnings by age group (Q3 2026).
Pay by percentile
Annual wage percentiles from the BLS Occupational Employment and Wage Statistics (OEWS). Percentiles are a good proxy for pay by experience.
Projected pay for Radiation Therapists (3, 5 and 10 years)est.
Today $105,310 → in 3 years $115,200 → in 5 years $122,400 → in 10 years $142,100 (10-year range $122,200–$165,000). The model assumes pay growth of +3.0% per year.
What drives the annual growth rate
Projected pay = current pay × (1 + annual growth)^years. The annual growth rate starts from a base wage-growth rate and adds or subtracts labor demand (BLS projected employment growth), wage momentum and AI replacement risk for each occupation. Projections are not guarantees. How it is calculated →
Outlook score for Radiation Therapists
Each component is a percentile rank among all occupations in the same country (0–100). Weights: labor demand 25, wage momentum / openings 15, pay level 15, AI resistance 25, aging workforce 10 (Japan only), entry barrier 10.
Will AI replace Radiation Therapists? AI replacement risk
How AI is changing this job
A written analysis for this occupation is being prepared.
AI replacement risk compares the parts of a job that are easy to hand to AI or software (processing information, documentation, repetitive computer work) with the parts that are hard to automate (physical work, working closely with people, judgment in unpredictable settings), using O*NET work activities, work context, skills and knowledge. The result is a relative position among all occupations in the country, scaled to 0–100%. Methodology →
Labor demand for Radiation Therapists
Employment projections are from the BLS Employment Projections program (2025–35). Annual openings include both new jobs and replacement of workers who leave the occupation.
Skills, education and requirements for Radiation Therapists
Key skills
O*NET skill level ratings (0–7).
Key knowledge areas
What the work involves
Important abilities
Education of workers
Training before entry
Related work experience
Job Zone 3 — medium preparation needed (O*NET)
Difficulty of entry: ★★☆☆☆ Fairly easy (from education, training, experience and Job Zone)
How to become radiation therapists
A step-by-step guide for this occupation is being prepared. The education, training and experience data above show the typical path.
Career path and how to earn more as radiation therapists
Career-path guidance is being prepared. Pay by percentile is shown in the Pay section.