are you radioactive after a nuclear stress test?
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The dose of radioactivity you will receive is very small (for most Nuclear Medicine tests usually in the range of the dose you receive from a chest X-ray) and will not cause any problems.
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All elements with atomic numbers greater than 83 are radioisotopes meaning that these elements have unstable nuclei and are radioactive. Elements with atomic numbers of 83 and less, have isotopes (stable nucleus) and most have at least one radioisotope (unstable nucleus).
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A cardiologist interprets the stress test and a nuclear medicine radiologist reads the image scan. You are able to obtain your results from your referring physician within 48-72 hours.
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All isotopes of uranium are radioactive. Both uranium and depleted uranium, and their immediate decay products, emit alpha and beta particles and a small amount of gamma radiation. Depletion of U-235 during processing leaves DU appreciably less radioactive than naturally occurring isotopic mixtures.
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Underground nuclear testing is the test detonation of nuclear weapons that is performed underground. When the device being tested is buried at sufficient depth, the nuclear explosion may be contained, with no release of radioactive materials to the atmosphere.
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A thallium stress test is a nuclear imaging test that shows how well blood flows into your heart while you're exercising or at rest. This test is also called a cardiac or nuclear stress test.
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Exposure to very high levels of radiation, such as being close to an atomic blast, can cause acute health effects such as skin burns and acute radiation syndrome (“radiation sickness"). It can also result in long-term health effects such as cancer and cardiovascular disease.
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In an exercise stress test, electrodes are taped to your chest to detect your heart's rhythm. A nurse or technician will watch your heartbeat on a monitor while you exercise. If your doctor orders a nuclear stress test, you'll also receive an injection of radioactive dye that shows the blood flow to your heart muscle.
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Your doctor may elect to proceed with stress testing to help define your overall risk of heart disease. This is a very reasonable option. However, if you had a stress test within the past two years and you remain asymptomatic, there is no need to repeat the test until it has been at least two years.
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Nodules that produce excess thyroid hormone — called hot nodules — show up on the scan because they take up more of the isotope than normal thyroid tissue does. Hot nodules are almost always noncancerous. In some cases, nodules that take up less of the isotope — called cold nodules — are cancerous.
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Practitioners of nuclear medicine utilize small amounts of radioactive isotopes for diagnostic purposes. These isotopes, called radioactive tracers, enter the body by injection or ingestion. They emit a signal, usually gamma rays, that can be identified.
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If you are indoors during a radiation emergency: Stay inside. Close and lock all windows and doors. Go to the basement or the middle of the building. Radioactive material settles on the outside of buildings; so the best thing to do is stay as far away from the walls and roof of the building as you can.
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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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If you were buying a new car from Japan I would not recommend that you invest in a radiation detector since imported new cars from Japan are monitored for radioactivity and, to my knowledge, no significant radiation has been detected.
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A chemical stress test is used when a traditional stress test (called a cardiac stress test) cannot be done. A cardiac stress test requires you to walk on a treadmill or ride a stationary bicycle until your heart rate reaches a level where your heart is stressed.
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You will be advised to maintain a distance of three feet from others for several days following radioiodine therapy. You also will need to wait several days before traveling on a prolonged automobile trip with other people. Over time, the amount of radiation in your body will diminish and eventually will go away.
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The amount of radiation exposure from an imaging test depends on the imaging test used and what part of the body is being tested. For instance: A single chest x-ray exposes the patient to about 0.1 mSv. This is about the same amount of radiation people are exposed to naturally over the course of about 10 days.