Final answer:
The use of a radioactive tracer to create an image of the bones is typically done through single-photon-emission computed tomography (SPECT) or PET scans. These procedures use low doses of radioisotopes that selectively concentrate in active bone cells, which are then detected to create detailed images for diagnostic purposes.
Step-by-step explanation:
The procedure that involves the use of a radioactive tracer to create an image of the bones is known as single-photon-emission computed tomography (SPECT) or positron emission tomography (PET). In these imaging techniques, radiopharmaceuticals are traced within the body to reveal metabolic and physiological functions in tissues including the bones. A low dose of a short-lived radioisotope is administered to the patient, which locates itself selectively in active bone cells, potentially indicating bone cancer. The emitted radiation, typically gamma radiation, has a sufficient range to leave the body and be detected by an external detector. The detector's output is then used by a computer to construct a detailed image.
Another example of a procedure that uses radioactive tracers is when compounds of technetium-99 are injected, allowing the detection of damaged tissues in the heart, liver, and lungs by the gamma rays emitted by the isotope. Iodine-131 is another radioisotope used to concentrate in the thyroid gland and other parts of the body, aiding in the monitoring and treatment of various conditions.