Iodine
Explanation
Radioisotopes are unstable isotopes of elements that emit radiation. In medicine, specific radioisotopes are used for diagnosis and treatment based on their chemical affinity for certain organs or tissues.Analysis of Options:
- Uranium: Primarily used as fuel in nuclear reactors and in the production of nuclear weapons. It is not used for the treatment of goitre.
- Cobalt (specifically Cobalt-60): A radioisotope used in radiotherapy for the treatment of cancer due to its emission of high-energy gamma rays.
- Iodine (specifically Iodine-131): The thyroid gland naturally absorbs iodine to produce hormones. Iodine-131 is used to diagnose and treat thyroid disorders, including goitre (enlargement of the thyroid) and thyroid cancer. It works by destroying overactive thyroid tissue.
- Carbon (specifically Carbon-14): Used in radiocarbon dating to determine the age of fossils and archaeological specimens. It is not used in medical treatment for goitre.
Key Takeaway: Iodine-131 is the specific radioisotope used for the diagnosis and treatment of thyroid-related disorders such as goitre and hyperthyroidism.