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Job Duties. Health physics technicians use equipment, such as spectrometers and gamma counters, to determine levels of radiation. They calculate exposure times and instruct workers in safety procedures and precautions, including the use of radiation detectors and protective gear.
Radiologists and radiology technicians are both health-care professionals who work in clinical or hospital settings. Technicians perform diagnostic tests on patients, while radiologists interpret the tests and prescribe a course of treatment.