Answer:
Technetium is used in two main ways. The first is as a corrosion prohibitor. Little bits of it are added to steel during production. The second is
in nuclear medicine as a radioactive tracer. In this application, the radionuclide is chemically attached to a drug chosen for its tendency to collect in specific organs of the body, and the solution is then injected into the patient. After a short time (its half-life is only 6 hours), an image is collected with a radiosensitive detector for analysis.
This technique is very useful in identifying cancer metastases in locations distant from primary tumors.