Hyperthyroidism is one the of the most common diseases affecting middle-aged and senior cats. It is a result of the enlargement of the thyroid gland, which in turn causes an increase in release of the thyroid hormones, T3 and T4. Injected painlessly under the skin, radioactive iodine is absorbed throughout the body, including the thyroid gland. Radioactive particles attack and destroy unhealthy thyroid tissue while normal thyroid and other body tissues remain unharmed. I-131 has been shown to be over 95% effective in curing Hyperthyroid cats. A recent study revealed that cats treated with I-131 lived an average of 3 years longer than cats treated with just oral medication and that the cost of I-131 treatment compared to oral medications was more cost effective. Our compassionate medical team represents years of nuclear medicine experience and feline care. We can promise you that your companion will be in the best hands at New England Veterinary Imaging Center, which is located at Myhre Equine Clinic in Rochester NH.