| positron emission tomography |
There are some isotopes (11C, 15O, 13N) which have a short half life and which emit positrons. During the annihilation of the positrons two gamma photons are emitted simultaneously 180?from one another. From that point, the simultaneous use of a large number of detectors positioned in a ring around the patient (positron camera) enables coincidence detection of the arrival of the two photons and location of where they came from.
출처: etoile.univ-lyon1.fr/ANGLAIS/sommary/glossary.html
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| positron emission tomography |
A nuclear medicine technique for imaging certain radionuclides or radioisotopes. This method can identify areas essentially anywhere in the body that exhibit "hot spots", which are sites of increased physiological activity, such as cancer cells. PET is used to study critically important elements of living tissue (eg, oxygen, nitrogen) and is commonly used for examinations of the brain and heart.
출처: www.keyhealth.net/definitions.html
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| positron emission tomography |
Uses radioisotopes to produce images of the activity of the brain and heart by tracking metabolism or blood flow and not anatomy.
출처: www.usnews.com/usnews/health/hospitals/articles/gl...
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| positron emission tomography |
a tool used to diagnose brain functions and disorders. PET produces three-dimensional, colored images of chemicals or substances functioning within the body. These images are called PET scans. PET shows brain function, in contrast to CT or MRI, which show brain structure.
출처: www.huntingtons.info/MT/archives/2003/11/huntingto...
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| positron emission tomography |
An imaging process like MRI or CT, that provides specific information about brain activity and structure that has been used to assist in the diagnosis of AD and track its progression, especially the loss of energy metabolism in those areas of the brain affected by the disease.
출처: www.accerapharma.com/glossary.html
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