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4 Weeks Before. Most patients must stop taking thyroid hormone medicine (such as synthroid, cytomel, lerothyroxine, or lithyronine) 4 weeks before their uptake and scan. Check with your provider BEFORE you stop taking this medicine. In the Week Before.
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- What Are Thyroid Nuclear Medicine Tests (Thyroid Scan and Uptake)?
- What It's Used For
- Preparation
- How It's Done
- Follow-Up
- Risks
- When to Call A Professional
- Additional Info
- Further Information
There are two types of thyroid nuclear medicine tests. Both assess the health of your thyroid, a gland in your neck. The first type, a thyroid scan, produces a picture of the gland. It can spot lumps or inflammation, or to investigate the cause of an overactive thyroid. The second type, a radioactive iodine uptake test, is performed to see if your ...
A thyroid scan is usually ordered when a physical examination or laboratory finding suggests that the thyroid is enlarged or has a lump (called a thyroid nodule). If laboratory tests show an overactive thyroid, a radioactive iodine uptake test may be ordered at the same time to evaluate thyroid function.
If there is any chance that you are pregnant, or if you are breast-feeding, let your doctor know: radionuclides could harm a developing fetus or your nursing baby. Your doctor has other ways of diagnosing the problem, such as ordering additional blood tests or a thyroid ultrasound. For about a week before a thyroid scan, your doctor may ask you to ...
A radionuclide is either injected into a vein or given to you as a pill.Timing of the test then depends on the type of radionuclide your doctor uses, and whether you will also have an uptake test. If you are having only a thyroid scan and your doctor prefers to give a radionuclide by intravenous injection, the scan can be done within 30–60 minutes....
The vast majority of the weakly radioactive substances used in these tests are cleared from your body within a day or two. But even before then, you can interact normally with other people because there's no risk of exposing them to significant amounts of radiation from your body. It takes an hour or more for the pictures to be developed and additi...
Risk of a thyroid scan is minimal. The amount of radioactivity you are exposed to is comparable to that from a routine x-ray. The amount of radionuclide used is so small that it's unlikely to cause side effects or allergic reactions, and the benefits of having the test done usually outweigh any risks. Women who are nursing or pregnant should discus...
Harmful side effects are not expected; people typically need to call their doctors only for scan results.
American Thyroid Association https://www.thyroid.org/ American Association of Clinical Endocrinologists https://www.aace.com/
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances. Medical Disclaimer
A thyroid scan is a type of nuclear medicine imaging. The radioactive iodine uptake test (RAIU) is also known as a thyroid uptake. It is a measurement of thyroid function, but does not involve imaging. Nuclear medicine uses small amounts of radioactive material called radiotracers. Doctors use nuclear medicine to diagnose, evaluate, and treat ...
May 20, 2023 · Citation, DOI, disclosures and article data. Tc-99m pertechnetate thyroid scintigraphy (thyroid scan) is a functional nuclear medicine study used to assess the thyroid gland. The uptake of the pertechnetate anion - similar in chemical-physical characteristics to the iodide ion (i. e. ionic size and negative charge) - in the thyroid parenchyma ...
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Sep 17, 2018 · Thyroid scans are usually performed on an outpatient basis in the nuclear medicine department of a hospital. They can be administered by a nuclear medicine technologist. Your endocrinologist may ...
A thyroid nuclear medicine uptake and scan checks how your thyroid gland looks and works. The first uptake will be done on day 1. You will come back the next day for another uptake and the scan. Both parts of the test are done in the Imaging Services department at University of Washington Medical Center. How do the tests work? Uptake.
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What is a thyroid nuclear medicine uptake & scan?
What is a thyroid scan?
Oct 3, 2022 · The timing of radiotracer administration before the scan varies according to the route. The patients are asked to take oral radiotracer 24 hours before the scan, or they are injected with radiotracer 30 minutes before the scan. Sodium iodide symporters located on the cells of the thyroid gland are responsible for uptaking radioactive iodine.
