Thyroid And Parathyroid Ultrasound
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Test Overview
A thyroid and parathyroid ultrasound is an imaging test to check the thyroid gland and parathyroid glands. A thyroid ultrasound can help measure the size and shape of the thyroid gland, but it cannot tell how well the thyroid gland is working. Ultrasound also may be used to check the four parathyroid glands that lie behind to the thyroid. See an illustration of the thyroid gland and parathyroid glands 
.
The thyroid gland makes a hormone called thyroxine that controls how fast the body converts food into energy (metabolism). Parathyroid hormone (PTH) is made by the parathyroid glands and controls the amount of calcium and phosphorus in the blood.
During a thyroid and parathyroid ultrasound, a small handheld instrument called a transducer is passed back and forth over the neck to form a picture of the thyroid gland and parathyroid glands.
| Last updated: | July 26, 2006 |
|---|---|
| Author: | Sydney Youngerman-Cole, RN, BSN, RNC |
| Reviewed By: | Caroline S. Rhoads, MD - Internal Medicine, Matthew I. Kim, MD - Endocrinology & Metabolism |
| Editors: | Susan Van Houten, RN, BSN, MBA, Tracy Landauer |
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