radioiodine uptake test definition
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Radioactive Iodine Uptake Testing Radioactive iodine uptake testing is a useful diagnostic tool for assessing thyroid pathologies. The atom is the smallest unit of an element. An atom consists of electrons, protons and neutrons. Electrons revolve around the nucleus (made of protons and neutrons) in fixed orbits. The number of electrons equals number of protons in a neutral atom.
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- Radionuclide scan: A nuclear medicine examination in which a minute amount of radioactive material is labelled to commonly found substances in the body such as iodine or phosphate. As those radioactive substances go to their normal positions in the body, images of bones, thyroid tissue, and other organs are created.
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Thyroid Nuclear Medicine Scan A thyroid scan may also be referred to as a thyroid scintiscan. The name of the radioactive substance used may be incorporated and the study called a technetium thyroid scan or an iodine thyroid scan. The radioactive iodine uptake scan may be called by its initials, an RAIU test, or an iodine uptake test.his indicates that this area of the thyroid gland is underactive. A variety of conditions, including cysts, nonfunctioning benign growths, localized inflammation, or cancer may produce a cold spot. A thyroid nuclear medicine scan is rarely sufficient to establish a clear diagnosis.
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- Radioactive iodine: Iodine with radioactivity that can be used in low doses to test the thyroid gland or destroy an overactive gland. Large doses can be used to destroy cancerous tissue. External radiation: A beam of radiation is directed at the thyroid, on multiple appointments.
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protein-bound iodine test protein-bound iodine test n. A test to determine thyroid function in which serum protein-bound iodine is measured. The American Heritage® Stedman's Medical Dictionary
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Medical Definition of Radionuclide stress test Medical Definition of Radionuclide stress test. Radionuclide stress test: A procedure that involves injecting a radioactive isotope, typically thallium or cardiolyte, into the patient's vein after which an image of the patient's heart becomes visible with a special camera. The radioactive isotopes are absorbed by the normal heart muscle.
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- Many studies have shown that it outperforms the traditional stalwart of thyroid cancer follow-up, radioactive iodine (RAI) whole body scanning, in such athyrotic patients (15). Soluble thyroid tumor markers--old and new challenges and potential solutions.
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- Common Fastener Types. Figure 2 illustrates the variety of male fasteners used in industry; the most common. types are hex head, slotted head, flat (or countersunk) head, round head, socket (or. “allen”) head, button head and socket set screw. Figure 3 shows different female.
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- During a radionuclide test, a small amount of a radioactive substance called an isotope is injected into your blood (sometimes during exercise). If you have difficulty exercising, you may be given some medication to make your heart beat faster.
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radioimmunoassay radioimmunoassay (RIA) a technique in radiology used to determine the concentration of an antigen, antibody, or other protein in the serum. The technique involves the injection of a known amount of a radioactively labeled substance that reacts with the protein in question.
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Radiation Radioactive iodine (131I) is a type of systemic radiation therapy commonly used to help treat some types of thyroid cancer. Thyroid cells naturally take up radioactive iodine. For systemic radiation therapy for some other types of cancer, a monoclonal antibody helps target the radioactive substance to the right place.
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Thyroid Cancer Glossary RAI is also used for treatment of thyroid cancer, in which cases the patient takes a large dose of radioactive iodine to kill any recurrent or metastasized thyroid cells. Radioactive iodine uptake (RAIU): A test measuring the amount of orally administered radioactive iodine taken up by the thyroid gland. RAI ablation: Administration of a radioactive form of iodine (131I) to try to destroy any remnant (normal or cancerous) thyroid tissue left after surgery in the thyroid bed or neck.
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Thyroid Scan and Uptake Thyroid Scan and Uptake procedure is a type of nuclear medicine imaging technique that is used to measure the thyroid function. The thyroid gland is located in the neck area and produces hormones, which controls the metabolism of the body and affects multiple organ systems.
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- 1. 0. 6. Thyroid scans and uptake tests use small doses of radioactive chemicals to create pictures of the thyroid gland. These tests help to assess the size, structure and function of the thyroid. Note: the information below is a general guide only.
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Thyroid Scan and Uptake The thyroid scan and thyroid uptake provide information about the structure and function of the thyroid. The thyroid is a gland in the neck that controls metabolism, a chemical process that regulates the rate at which the body converts food to energy. top of page.he thyroid scan and thyroid uptake provide information about the structure and function of the thyroid. The thyroid is a gland in the neck that controls metabolism, a chemical process that regulates the rate at which the body converts food to energy. top of page.
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Thyroid Scan and Uptake For example, you may have uptake measurements at four to six hours and 24 hours. When it is time for the imaging to begin, you will sit in a chair facing a stationary probe positioned over the thyroid gland in the neck.
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- Because of this function, radioisotopes of iodine are concentrated in the thyroid gland along with nonradioactive iodine. The radioisotope iodine-131, which has a high fission product yield, concentrates in the thyroid, and is one of the most carcinogenic of nuclear fission products. Occurrence.
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Radioactive Iodine for Hyperthyroidism Depending on the dose, radioactive iodine can kill a portion, or all, of your thyroid. Your doctor will order a radioactive iodine uptake and scan to determine your dose, the cause of your hyperthyroidism, and information about your thyroid tissue. In this test, you will ingest a very small dose of radioactive iodine.
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Thyroid Uptake and Scan Uptake For the uptake, you will swallow a small dose of radioactive material (tracer). This tracer collects in your thyroid gland and gives off gamma and beta rays. A sensor will detect how much of the tracer your thyroid absorbs. Scan In the second part of the exam, a small amount of tracer is injected into a vein, usually in your arm. taken with a camera.
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Radioactive iodine uptake test The radioactive iodine uptake test, or RAIU test, is a type of scan used in the diagnosis of thyroid problems, particularly hyperthyroidism.he normal uptake is between 15 and 25 percent, but this may be forced down if, in the meantime, the patient has eaten foods high in iodine, such as dairy products and seafood. Low uptake suggests thyroiditis, high uptake suggests Graves' disease, and unevenness in uptake suggests the presence of a nodule.
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About Hyperthyroidism A measurement of how much iodine the thyroid gland can collect) via a radioactive iodine uptake (RAIU) test and thyroid scan (a thyroid scan shows how the iodine is distributed throughout the thyroid gland) can be useful in determining the cause of hyperthyroidism and ultimately its treatment.
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radioimmunoassay 1. 1  a test procedure that integrates immunologic and radiolabeling techniques to measure minute quantities of a substance, as a protein, hormone, or drug, in a given sample of body fluid or tissue. Origin of radioimmunoassay.
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radioimmunoassay A technique used to quantitate minute amounts of a substance, such as a hormone, in blood or another liquid. It involves the use of radioisotopes and of antibodies to the substance being investigated.
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- How It Is Done. A radioactive iodine uptake (RAIU) test is done in the nuclear medicine section of a hospital's radiology department by a person trained in nuclear medicine (nuclear medicine technologist). For this test, you will lie on your back with your head tipped backward and your neck extended.ow It Is Done. A radioactive iodine uptake (RAIU) test is done in the nuclear medicine section of a hospital's radiology department by a person trained in nuclear medicine (nuclear medicine technologist). For this test, you will lie on your back with your head tipped backward and your neck extended.
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- A positron emission tomography (PET) scan is a unique type of imaging test that helps doctors see how the organs and tissues inside your body are actually functioning. The test involves injecting a very small dose of a radioactive chemical, called a radiotracer, into the vein of your arm.
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- a picture revealing the presence of radioactive material, the film being laid directly on the object to be tested. Also, autoradiogram.