How is technetium-99m used in medical imaging?
Technetium (Tc-99m) is an isotope commonly used in a number of medical diagnostic imaging scans. Tc99m is used as a radioactive tracer for nuclear medicine; which is a form of medical imaging that assesses how particular parts of our body are working or functioning.
What are some of the applications of Tc-99m?
Tc-99m is used in medical therapy in brain, bone, liver, spleen, kidney, and thyroid scanning and for blood flow studies.
What scans use technetium-99m?
The technetium-99m radioisotope is used predominantly in bone and brain scans. For bone scans, the pertechnetate ion is used directly, as it is taken up by osteoblasts attempting to heal a skeletal injury, or (in some cases) as a reaction of these cells to a tumor (either primary or metastatic) in the bone.
What is the role of technetium 99?
Technetium-99m (99mTc) is a radionuclide nuclear agent that is FDA approved for diagnostic imaging of the brain, bone, lungs, kidneys, thyroid, heart, gall bladder, liver, spleen, bone marrow, salivary and lachrymal glands, blood pool, and sentinel nodes.
What happens when technetium 99m enters the body?
Technetium-99 can pose a health risk when it enters the body. Once in the human body, Tc-99 concentrates in the thyroid gland and the gastrointestinal tract. However, the body constantly gets rid of Tc-99 in feces. The Tc-99m used in medical diagnostics has a short, six-hour half-life and does not remain in the body.
How is technetium-99m made and what is it used for?
Technetium-99 is produced during nuclear reactor operation, and is a byproduct of nuclear weapons explosions. Technetium-99 can be found as a component of nuclear waste. Technetium-99m is a short-lived form of Tc-99 that is used as a medical diagnostic tool.
How is technetium-99m produced in hospitals?
Hospitals cannot run their own nuclear reactors and so they rely on technetium generators – machines that produce Tc-99m from the decay of its parent isotope molybdenum-99. Once Mo-99 has been produced it is placed into a technetium generator and these generators are transported to hospitals.
Why is technetium used in bone scans?
Technetium-99m methylene diphosphonate (MDP) is one of the most commonly used tracers for SS and its mechanism of action involves a complex interaction of bone repair and blood flow. SS targets the bony cortex, binding to the hydroxyapetite produced when the bone attempts to repair damage caused by metastases.
Is technetium-99m a radiopharmaceutical?
Technetium-99m (99mTc) is a synthetic radioisotope that is used worldwide to produce radiopharmaceuticals that are mainly used for diagnostic purposes in nuclear medicines. The purity of the final radiopharmaceutical (99mTc-R) can be confirmed by applying chromatographic methods.
How is strontium 90 USED?
What is it used for? Because Sr-90 generates heat as it decays, it is used as a power source for space vehicles, remote weather stations, and navigational beacons. It also is used in industrial gauges and medically, in a controlled manner, to treat bone tumors.