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Found Radionuclide 5 times.

Displaying results 1 to 10.

1. Bone scan
This is a technique to demonstrate abnormal metabolic activity in bone. The procedure involves intravenous injection of the radionuclide which is usually sodium pertechnetate (technetium Tc99m methylene diphosphonate) which is taken up in areas of active growth in bone. It is possible to differentiate normal growth and excessive growth from the level of radioactivity emitted. This method can detect metastatic tumor to bone from the prostate, breast, lung, kidney, bladder and thyroid, arthritis, osteomyelitis, and new fractures. Other methods include WBC scan and gallium scan.

2. Brain scan
This is a technique to demonstrate the pattern of blood perfusion of the brain. The procedure involves intravenous injection of the radionuclide such as technetium 99m pertechnetate, mercury-210, or radioiodinated albumin . This method can diagnose cerebral hemorrhage, cerebrovascular accidents (CVA), tumor, hematoma , AV malformations, and aneurysm s.

3. Cardiac scans
These are tests in which radioactive molecules are injected intravenously to demonstrate damages and evaluate the function of the heart. As the injected radionuclide circulates to the heart, the presence of radioactivity in the ventricles of the heart or the myocardium is measured. * Thallium scan: Thallium is taken up by normal cells, in which case the scan shows an evenly distributed pattern of radioactivity. Ischemic areas or infarcted areas take up less thallium and appear as cold spots on the scan. * Technetium-99m pyrophosphate scintigraphy: This is used to diagnose acute myocardial infarction at least 18 hours postinfarction. Areas of damaged myocardium contain calcium which complexes with the Technetium-99m. Therefore infarcted areas appear as hot spots.* Thallium Stress Testing: Evaluates heart function. This is the observation of thallium distribution in the myocardium during exercise. Ischemic areas induced by stress will appear as cold spots. * Persantine Thallium Scan: Evaluates heart function. For patients who cannot exercise, the persantine-thallium scan can be used to reveal ischemic areas. Persantine is the trademark for the drug dipyridamole which is a coronary vasodilator. Persantine dilates normal coronary vessels more than the occluded vessels. Blood would preferentially flow to the normal vessels; a sort of "steal" phenomenon. A thallium scan can then reveal the ischemic areas by demonstrating reduced perfusion.

4. Nuclear medicine
Generally speaking, this field encompasses any use of radiactive materials in medicine. This includes the use of radiation as therapy to treat cancer, the use of x-rays to diagnose injury, the use of radionuclides in solution to trace processes in the body, etc. Compare radiology .

5. Radionuclide angiography
radionuclide angiography is an imaging technique by introducing radionuclide s into a blood vessel so that the patency of the vessel is examined.

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