I-131 Radioiodine Therapy is a specialized nuclear medicine treatment that uses radioactive iodine to manage certain thyroid conditions. Because thyroid cells naturally absorb iodine, radioactive iodine can selectively target thyroid tissue while limiting exposure to most other parts of the body. The treatment is commonly considered for selected patients with hyperthyroidism, such as Graves’ disease or toxic thyroid nodules, and for certain cases of differentiated thyroid cancer after appropriate evaluation.
How I-131 Therapy Works
Before treatment, a specialist reviews the patient’s medical history, thyroid function tests, imaging, medications, and other relevant factors. A carefully calculated dose of radioactive iodine is then administered, usually orally. The thyroid tissue absorbs the iodine, and the radiation gradually reduces targeted thyroid activity.
Benefits of I-131 Radioiodine Treatment
For appropriate patients, radioiodine therapy for hyperthyroidism can provide a convenient and effective treatment option without surgery. In selected thyroid cancer cases, I-131 may also be used to destroy remaining thyroid tissue or iodine-avid cancer cells following surgery.
Preparation and Aftercare
Patients may need specific dietary or medication instructions before treatment. After receiving I-131, radiation safety precautions are important because the body temporarily emits radiation. Your nuclear medicine specialist will provide individualized instructions regarding distance from others, hygiene, travel, work, and contact with children or pregnant individuals.
Who May Need This Treatment?
I-131 therapy is recommended only after specialist assessment. The suitability, dosage, preparation, and follow-up depend on the underlying thyroid condition and individual health factors.