| diagnostic techniques, radioisotope | Any diagnostic evaluation using radioactive (unstable) isotopes. This diagnosis includes many nuclear medicine procedures as well as radioimmunoassay tests. (12 Dec 1998) |
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| diagnostic techniques and procedures | Methods, procedures, and tests performed to diagnose disease, disordered function, or disability. (12 Dec 1998) |
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| diagnostic techniques, cardiovascular | Methods and procedures for the diagnosis of diseases or dysfunction of the cardiovascular system or its organs or demonstration of their physiological processes. (12 Dec 1998) |
| diagnostic techniques, digestive system | Methods and procedures for the diagnosis of diseases or dysfunction of the digestive system or its organs or demonstration of their physiological processes. (12 Dec 1998) |
| diagnostic techniques, endocrine | Methods and procedures for the diagnosis of diseases or dysfunction of the endocrine glands or demonstration of their physiological processes. (12 Dec 1998) |
| diagnostic techniques, neurological | Methods and procedures for the diagnosis of diseases of the nervous system, central and peripheral, or demonstration of neurologic function or dysfunction. (12 Dec 1998) |
| diagnostic techniques, obstetrical and gynecological | Methods and procedures for the diagnosis of conditions related to pregnancy, labour, and the puerperium and of diseases of the female genitalia. It includes also demonstration of genital and pregnancy physiology. (12 Dec 1998) |
| diagnostic techniques, ophthalmological | Methods and procedures for the diagnosis of diseases of the eye or of vision disorders. (12 Dec 1998) |
| diagnostic techniques, otological | Methods and procedures for the diagnosis of diseases of the ear or of hearing disorders or demonstration of hearing acuity or loss. (12 Dec 1998) |
| diagnostic techniques, respiratory system | Methods and procedures for the diagnosis of diseases of the respiratory tract or its organs. It includes respiratory function tests. (12 Dec 1998) |
| diagnostic techniques, surgical | Methods and procedures for the diagnosis of disease or dysfunction by examination of the pathological site or operative field during surgical intervention. (12 Dec 1998) |
| diagnostic techniques, urological | Methods and procedures for the diagnosis of diseases or dysfunction of the urinary tract or its organs or demonstration of its physiological processes. (12 Dec 1998) |
| radioisotope | <chemical, radiobiology> Form of a chemical element with unstable neutron number, so that it undergoes spontaneous nuclear disintegration. Major use in biology is to trace the fate of atoms or molecules that follow the same metabolic pathway or enzymic fate as the normal stable isotope, but that can be detected with high sensitivity by their emission of radiation. Also used to locate the position of the radioactive metabolite, as in autoradiography and to measure relative rates of synthesis of compounds from radioactive precursors. (18 Nov 1997) |
| radioisotope dilution technique | Method for assessing flow through a system by injection of a known quantity of radionuclide into the system and monitoring its concentration over time at a specific point in the system. (12 Dec 1998) |
| radioisotope renography | Graphic tracing over a time period of radioactivity measured externally over the kidneys following intravenous injection of a radionuclide which is taken up and excreted by the kidneys. (12 Dec 1998) |
| radioisotope teletherapy | A type of high-energy radiotherapy using a beam of gamma-radiation produced by a radioisotope source encapsulated within a teletherapy unit. (12 Dec 1998) |