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nuclear medicine |
Also found in: Dictionary/thesaurus, Medical, Wikipedia, Hutchinson | 0.02 sec. |
nuclear medicineMedical specialty using radioactive elements or isotopes for diagnosis and treatment of disease. A radioisotope is introduced into the body (usually by injection). The radiation it emits, detected by a scanner and recorded, reflects its distribution in different tissues and can reveal the presence, size, and shape of abnormalities in various organs. The isotopes used have short half-lives and decay before radioactivity causes any damage. Different isotopes tend to concentrate in particular organs (e.g., iodine-131 in the thyroid). Radioactive substances are also implanted to treat small, early-stage cancers. This yields a slow, continuous dose that limits damage to normal cells while destroying tumour cells. See also computerized axial tomography; diagnostic imaging; positron emission tomography; radiation therapy; radiology. nuclear medicine [′nü·klē·ər ′med·ə·sən] (medicine) A branch of medicine in which radioactive pharmaceuticals are used for imaging or other diagnostic studies. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| The examination--which was carried out at baseline, 6 months after the cardiac rehabilitation program, and at the 12-month follow-up--included: a symptom-limited cardiopulmonary exercise test for measuring hemodynamic and metabolic variables, echocardiography for left ventricular volume and diameter measures, thallium scintigraphy for myocardial perfusion, and coronary angiography for restenosis and progression of CAD. On March 2, bone scintigraphy showed diffuse inflammation of all joints, specifically at the left shoulder, wrist, and hand (Figure 2A). Partial multiphase skeletal scintigraphy and single-photon emission CT of the cranium showed increased bone metabolism in the area of the right frontal bone. |
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