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Thyroid Hormone Tests. Guide. Thyroid hormone tests are blood tests that check how well the thyroid gland is working. The thyroid gland makes hormones that regulate the way the body uses energy. The thyroid gland is a butterfly-shaped gland that lies in front of your windpipe (trachea), just below your voice box (larynx).
You may have tests to see how well your thyroid is working and to make sure the nodule is not cancer. Possible tests include: 1  A blood test to check the level of thyroid hormone in your body. 2  A thyroid scan, which uses radioactive material and a camera to see how well your thyroid gland is working.ossible tests include: 1  A blood test to check the level of thyroid hormone in your body. 2  A thyroid scan, which uses radioactive material and a camera to see how well your thyroid gland is working.