energy or radiation . Some types of radiation are gamma rays , beta particles , and alpha particles . The scanner and the different types of radiation help make a picture to track the radiation through the patient's body . To perform a radioactive tracer a radioactive isotope replaces a chemical element in an atom . An atom contains electrons , neutrons , and protons and is very small . The radioactive isotopes can be followed through the body using radiation detectors to study diseases . By the high morality of its radioactive decay , it can be used to explore the processes of the body while following the radioactive isotopes path .
energy or radiation . Some types of radiation are gamma rays , beta particles , and alpha particles . The scanner and the different types of radiation help make a picture to track the radiation through the patient's body . To perform a radioactive tracer a radioactive isotope replaces a chemical element in an atom . An atom contains electrons , neutrons , and protons and is very small . The radioactive isotopes can be followed through the body using radiation detectors to study diseases . By the high morality of its radioactive decay , it can be used to explore the processes of the body while following the radioactive isotopes path .