Radiation Therapist Career Guide
Radiation therapists operate advanced medical linear accelerators and proton therapy systems to deliver pinpoint, high-energy ionizing radiation treatments that destroy cancerous tumors while sparing healthy surrounding tissue.
At-a-Glance Career Snapshot
U.S. Bureau of Labor Statistics (BLS) national benchmark.
Projected national healthcare employment expansion.
Recognized accrediting body for educational programs.
1. Role Overview & Clinical Scope of Practice
Radiation therapists are core members of the multidisciplinary radiation oncology team—working side by side with Radiation Oncologists, Medical Physicists, and Medical Dosimetrists to treat more than half of all cancer patients. Because external-beam radiation therapy is typically delivered in daily fractions over 1 to 7 weeks, radiation therapists build deep, supportive longitudinal bonds with oncology patients.
Before treatment begins, radiation therapists perform "CT simulation"—creating custom immobilization masks or body molds, placing tiny alignment markers, and acquiring precision CT scans that the dosimetrist and physicist use to map the tumor target volume.
During daily treatment sessions, radiation therapists position the patient with sub-millimeter accuracy on the treatment couch, verify internal tumor alignment using onboard Cone-Beam CT (CBCT) or Image-Guided Radiation Therapy (IGRT), and operate the medical linear accelerator (LINAC) to deliver Intensity-Modulated Radiation Therapy (IMRT), Volumetric Modulated Arc Therapy (VMAT), Stereotactic Body Radiation Therapy (SBRT/CyberKnife), or Proton Beam Therapy.
2. Core Clinical & Technical Responsibilities
In daily clinical practice, a Radiation Therapist performs the following core responsibilities:
- Perform CT simulation procedures, fabricating custom thermoplastic immobilization masks and vacuum cushions to ensure reproducible patient positioning.
- Operate medical linear accelerators (LINACs), proton therapy gantries, and high-dose-rate (HDR) brachytherapy afterloaders to deliver prescribed radiation doses.
- Acquire and match daily pre-treatment Image-Guided Radiation Therapy (IGRT) and Cone-Beam CT scans to verify exact tumor target alignment prior to beam delivery.
- Monitor patients visually and via two-way audio intercom from the shielded control console throughout every treatment fraction.
- Assess patients daily for acute radiation side effects (such as radiation dermatitis, mucositis, esophagitis, or fatigue) and coordinate symptom management with the radiation oncologist and oncology nurse.
- Perform daily linear accelerator output constancy, laser alignment, and radiation safety interlock checks alongside medical physicists.
3. Education Requirements & Accredited Schools
Recognized Program Accreditor: JRCERT (Joint Review Committee on Education in Radiologic Technology)
Candidates enter the profession by completing either a two-year Associate of Applied Science (AAS) degree or a four-year Bachelor of Science degree in Radiation Therapy accredited by the Joint Review Committee on Education in Radiologic Technology (JRCERT). Alternatively, licensed Radiologic Technologists—RT(R)—can complete a 12-month JRCERT-accredited certificate program in radiation therapy.
The curriculum covers radiation physics, radiobiology, oncology pathology, sectional anatomy, treatment planning and dosimetry, linear accelerator operations, and 1,000+ hours of supervised clinical rotations in hospital radiation oncology departments.
4. National Certification Exams & State Licensure
Interstate Compact & Portability: ARRT RT(T) national certification is the universal examination standard across all state radiation control boards.
Over 35 states require radiation therapists to hold a state license in radiation therapy. Both state licensing agencies and oncology employers require national certification and registration as a Registered Technologist in Radiation Therapy—RT(T)—awarded by the American Registry of Radiologic Technologists (ARRT).
Experienced radiation therapists frequently advance by completing a 1- to 2-year JRCERT-accredited Medical Dosimetry program and passing the Medical Dosimetrist Certification Board (MDCB) exam to become a Certified Medical Dosimetrist (CMD), earning $130,000+ annually.
5. Salary Percentile Breakdown & Top-Paying Settings
Compensation for a Radiation Therapist varies based on clinical experience, specialty certifications, shift differentials, geographic region, and facility type.
| 10th Percentile Entry-Level Tier | 25th Percentile Early Career | 50th Percentile National Median | 75th Percentile Experienced Tier | 90th Percentile Senior / Lead |
|---|---|---|---|---|
| $71,850 Starting Wage | $83,410 1–3 Yrs Exp | $98,300 BLS Median | $117,920 Specialty / Acute | $139,840 Top Metro / Lead |
6. Work Environment & Career Advancement Ladder
Primary Employment Settings: Hospital radiation oncology departments, comprehensive cancer centers, outpatient radiation oncology clinics
Radiation Therapist RT(T) → Chief Radiation Therapist → Certified Medical Dosimetrist (CMD) or Oncology Department Director.
Many hospital systems and healthcare employers offer tuition reimbursement and clinical ladder differentials for professionals who pursue specialty certifications or bridge degrees.
7. 50-State Licensure, Compact Status & Regulatory Directory
Use the interactive directory below to review state regulatory boards, interstate compact participation, and license renewal requirements for Radiation Therapist professionals across all 50 states and Washington, D.C.
| State / Jurisdiction | Credential Portability | State Regulatory Authority | Licensure & Renewal Standard |
|---|---|---|---|
| Alabama AL | National Registry Recognized | Alabama Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Alaska AK | National Registry Recognized | Alaska Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Arizona AZ | National Registry Recognized | Arizona Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial / 4-yr) |
| Arkansas AR | National Registry Recognized | Arkansas Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| California CA | National Registry Recognized | California Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Colorado CO | National Registry Recognized | Colorado Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Connecticut CT | National Registry Recognized | Connecticut Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Annual / Biennial) |
| Delaware DE | National Registry Recognized | Delaware Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| District of Columbia DC | National Registry Recognized | District of Columbia Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Florida FL | National Registry Recognized | Florida Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Georgia GA | National Registry Recognized | Georgia Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Hawaii HI | National Registry Recognized | Hawaii Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Idaho ID | National Registry Recognized | Idaho Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Illinois IL | National Registry Recognized | Illinois Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Indiana IN | National Registry Recognized | Indiana Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Iowa IA | National Registry Recognized | Iowa Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Triennial / Biennial) |
| Kansas KS | National Registry Recognized | Kansas Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Kentucky KY | National Registry Recognized | Kentucky Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Annual / Biennial) |
| Louisiana LA | National Registry Recognized | Louisiana Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Annual / Biennial) |
| Maine ME | National Registry Recognized | Maine Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Maryland MD | National Registry Recognized | Maryland Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Massachusetts MA | National Registry Recognized | Massachusetts Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Michigan MI | National Registry Recognized | Michigan Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Minnesota MN | National Registry Recognized | Minnesota Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Mississippi MS | National Registry Recognized | Mississippi Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Missouri MO | National Registry Recognized | Missouri Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Montana MT | National Registry Recognized | Montana Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Nebraska NE | National Registry Recognized | Nebraska Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Nevada NV | National Registry Recognized | Nevada Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| New Hampshire NH | National Registry Recognized | New Hampshire Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| New Jersey NJ | National Registry Recognized | New Jersey Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| New Mexico NM | National Registry Recognized | New Mexico Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| New York NY | National Registry Recognized | New York Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Triennial (3 yrs)) |
| North Carolina NC | National Registry Recognized | North Carolina Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| North Dakota ND | National Registry Recognized | North Dakota Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Ohio OH | National Registry Recognized | Ohio Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Oklahoma OK | National Registry Recognized | Oklahoma Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Oregon OR | National Registry Recognized | Oregon Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Pennsylvania PA | National Registry Recognized | Pennsylvania Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Rhode Island RI | National Registry Recognized | Rhode Island Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| South Carolina SC | National Registry Recognized | South Carolina Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| South Dakota SD | National Registry Recognized | South Dakota Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Tennessee TN | National Registry Recognized | Tennessee Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Texas TX | National Registry Recognized | Texas Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Utah UT | National Registry Recognized | Utah Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Vermont VT | National Registry Recognized | Vermont Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Virginia VA | National Registry Recognized | Virginia Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Washington WA | National Registry Recognized | Washington Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Annual / Biennial) |
| West Virginia WV | National Registry Recognized | West Virginia Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Wisconsin WI | National Registry Recognized | Wisconsin Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |
| Wyoming WY | National Registry Recognized | Wyoming Dept. of Health / Licensing Board | National Board Exam + CEU Renewal (Biennial (2 yrs)) |