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Thyroid scan
- Your doctor may recommend a thyroid scan to help evaluate thyroid nodules. During this test, an isotope of radioactive iodine is injected into a vein in your arm. You then lie on a table while a special camera produces an image of your thyroid on a computer screen.
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Feb 11, 2022 · Your doctor may recommend a thyroid scan to help evaluate thyroid nodules. During this test, an isotope of radioactive iodine is injected into a vein in your arm. You then lie on a table while a special camera produces an image of your thyroid on a computer screen.
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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/
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Dec 6, 2019 · 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.
- hhp_info@health.harvard.edu
Nov 7, 2023 · Thyroid nodules come to clinical attention when noted by the patient; by a clinician during routine physical examination; or during a radiologic procedure, such as carotid ultrasonography, neck or chest computed tomography (CT), or positron emission tomography (PET) scanning.
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.
Sep 1, 2020 · This article reviews the workup for thyroid nodules, including how to interpret ultrasound findings and fine-needle aspiration (FNA) cytopathology, and a comparison of new molecular testing ...
Nov 8, 2023 · Nuclear imaging with radioiodine or 99m Tc-pertechnetate can help assess the functional status of thyroid nodules (hyper or hypo- functioning). It is also useful for characterizing different forms of hyperthyroidism based on specific scintigraphic patterns ( Figure 1) and for planning radioiodine therapy.
