Dear Dr. Roach: I'm set to have a CT scan of my lungs with iodine dye. I have hypothyroidism and am on 25 mg of levothyroxine. Should I take the medicine the day of the test? Or should I have the CT ...

FNA is recommended for all palpable solitary or dominant nodules, independent of size. FNA is preferred over thyroid scan or ultrasonography as the initial diagnostic test for thyroid nodules. However ...

A 75-year-old woman with end-stage renal disease who is on chronic hemodialysis has a suppressed thyroid-stimulating hormone (TSH) of 0.1 µU/mL and levels of free thyroxine (T4) and free ...

A nuclear medicine scan uses small amounts of radiation to create pictures of tissues, bones, and organs inside the body. The radioactive material collects in certain areas of your body, and special ...

The thyroid gland produces two thyroid hormones, triiodothyronine (T3) and thyroxine (T4), and releases them as needed by the body. The hypothalamus and the pituitary gland help control the thyroid ...

Nuclear medicine can help diagnose and treat different conditions, including some forms of cancer. In nuclear medicine, doctors put small amounts of radioactive material into your body so they can see ...

DEAR DR. ROACH: I'm set to have a CT scan of my lungs with iodine dye. I have hypothyroidism and am on 25 mg of levothyroxine. Should I take the medicine the day of the test? Or should I have the CT ...