Provide radiation therapy to patients as prescribed by a radiologist according to established practices and standards. Duties may include reviewing prescription and diagnosis; acting as liaison with physician and supportive care personnel; preparing equipment, such as immobilization, treatment, and protection devices; and maintaining records, reports, and files. May assist in dosimetry procedures and tumor localization.

Administer prescribed doses of radiation to specific body parts, using radiation therapy equipment according to established practices and standards. Position patients for treatment with accuracy according to prescription. Enter data into computer and set controls to operate and adjust equipment and regulate dosage. Follow principles of radiation protection for patient, self, and others. Maintain records, reports and files as required, including such information as radiation dosages, equipment settings and patients' reactions. 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. 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. Check for side effects such as skin irritation, nausea and hair loss to assess patients' reaction to treatment. Educate, prepare and reassure patients and their families by answering questions, providing physical assistance, and reinforcing physicians ' advice regarding treatment reactions and post-treatment care. Calculate actual treatment dosages delivered during each session. Prepare and construct equipment, such as immobilization, treatment, and protection devices. Photograph treated area of patient and process film. Help physicians, radiation oncologists and clinical physicists to prepare physical and technical aspects of radiation treatment plans, using information about patient condition and anatomy. Train and supervise student or subordinate radiotherapy technologists. Act as liaison with physicist and supportive care personnel. Provide assistance to other health-care personnel during dosimetry procedures and tumor localization. Implement appropriate follow-up care plans. Store, sterilize, or prepare the special applicators containing the radioactive substance implanted by the physician. Assist in the preparation of sealed radioactive materials, such as cobalt, radium, cesium and isotopes, for use in radiation treatments.

Customer and Personal Service -- Knowledge of principles and processes for providing customer and personal services. This includes customer needs assessment, meeting quality standards for services, and evaluation of customer satisfaction. Medicine and Dentistry -- Knowledge of the information and techniques needed to diagnose and treat human injuries, diseases, and deformities. This includes symptoms, treatment alternatives, drug properties and interactions, and preventive health-care measures. Mathematics -- Knowledge of arithmetic, algebra, geometry, calculus, statistics, and their applications. English Language -- Knowledge of the structure and content of the English language including the meaning and spelling of words, rules of composition, and grammar. Psychology -- Knowledge of human behavior and performance; individual differences in ability, personality, and interests; learning and motivation; psychological research methods; and the assessment and treatment of behavioral and affective disorders. Biology -- Knowledge of plant and animal organisms, their tissues, cells, functions, interdependencies, and interactions with each other and the environment. Physics -- Knowledge and prediction of physical principles, laws, their interrelationships, and applications to understanding fluid, material, and atmospheric dynamics, and mechanical, electrical, atomic and sub- atomic structures and processes. Education and Training -- Knowledge of principles and methods for curriculum and training design, teaching and instruction for individuals and groups, and the measurement of training effects.

Operation Monitoring -- Watching gauges, dials, or other indicators to make sure a machine is working properly. Time Management -- Managing one's own time and the time of others. Operation and Control -- Controlling operations of equipment or systems. Active Listening -- Giving full attention to what other people are saying, taking time to understand the points being made, asking questions as appropriate, and not interrupting at inappropriate times. Speaking -- Talking to others to convey information effectively. Instructing -- Teaching others how to do something. Critical Thinking -- Using logic and reasoning to identify the strengths and weaknesses of alternative solutions, conclusions or approaches to problems. Service Orientation -- Actively looking for ways to help people. Social Perceptiveness -- Being aware of others' reactions and understanding why they react as they do. Reading Comprehension -- Understanding written sentences and paragraphs in work related documents.

Problem Sensitivity -- The ability to tell when something is wrong or is likely to go wrong. It does not involve solving the problem, only recognizing there is a problem. Near Vision -- The ability to see details at close range (within a few feet of the observer). Oral Comprehension -- The ability to listen to and understand information and ideas presented through spoken words and sentences. Written Comprehension -- The ability to read and understand information and ideas presented in writing. Speech Clarity -- The ability to speak clearly so others can understand you. Oral Expression -- The ability to communicate information and ideas in speaking so others will understand. Deductive Reasoning -- The ability to apply general rules to specific problems to produce answers that make sense. Inductive Reasoning -- The ability to combine pieces of information to form general rules or conclusions (includes finding a relationship among seemingly unrelated events). Information Ordering -- The ability to arrange things or actions in a certain order or pattern according to a specific rule or set of rules (e.g., patterns of numbers, letters, words, pictures, mathematical operations). Written Expression -- The ability to communicate information and ideas in writing so others will understand.

Monitor Processes, Materials, or Surroundings -- Monitoring and reviewing information from materials, events, or the environment, to detect or assess problems. Processing Information -- Compiling, coding, categorizing, calculating, tabulating, auditing, or verifying information or data. Documenting/Recording Information -- Entering, transcribing, recording, storing, or maintaining information in written or electronic/magnetic form. Interacting With Computers -- Using computers and computer systems (including hardware and software) to program, write software, set up functions, enter data, or process information. Updating and Using Relevant Knowledge -- Keeping up-to-date technically and applying new knowledge to your job. Getting Information -- Observing, receiving, and otherwise obtaining information from all relevant sources. Assisting and Caring for Others -- Providing personal assistance, medical attention, emotional support, or other personal care to others such as coworkers, customers, or patients. Inspecting Equipment, Structures, or Material -- Inspecting equipment, structures, or materials to identify the cause of errors or other problems or defects. Communicating with Supervisors, Peers, or Subordinates -- Providing information to supervisors, co-workers, and subordinates by telephone, in written form, e-mail, or in person. Evaluating Information to Determine Compliance with Standards -- Using relevant information and individual judgment to determine whether events or processes comply with laws, regulations, or standards.