A radioisotope used in medical diagnosis or treatment.
Drug containing a radioactive substance that travels to a specific body region or organ that will be scanned (i.e.,CAT scan).
A radioactive preparation that is injected or given by mouth in certain diagnostic or treatment procedures.
Drugs used to diagnose or to treat certain medical conditions. Radiopharmaceuticals are used by nuclear medicine specialists to study how a particular organ is working and to detect tumors or cancer that may be present. Radiopharmaceuticals are radioactive. Given in very tiny, safe amounts, they expose a person to about the same amount of radiation as an X ray does.
A radioactive chemical or drug (eg., an isotope of technetium or iodine) that has a specific affinity for a particular body tissue or organ. It can be used in nuclear medicine to obtain images of structures, or to treat radiation-sensitive diseases.
A radioactive medicinal or chemical substance (typically radioactive iodine or cobalt) employed for diagnostic or therapeutic intentions.