A radiopharmaceutical is a type of medication that contains radioactive materials. These substances are used primarily in medical imaging and therapy. When introduced into the body, they emit radiation that can be detected by special cameras, allowing doctors to visualize organs and tissues. This helps in diagnosing various conditions, including cancers and heart diseases. In addition to imaging, radiopharmaceuticals can also be used for treatment. For example, certain types of cancer can be targeted with radiopharmaceuticals that deliver radiation directly to the tumor, minimizing damage to surrounding healthy tissue. This dual purpose makes them valuable in modern medicine.