| radionecrosis | Necrosis due to radiation; e.g., after excessive exposure to x-or gamma rays. See: radiation burn. (05 Mar 2000) |
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| radioneuritis | Neuritis caused by prolonged or repeated exposure to X-rays or radium. (05 Mar 2000) |
| radionitrogen | A radioactive isotope of nitrogen; e.g., 13N. (05 Mar 2000) |
| radionuclide | An isotope of artificial or natural origin that exhibits radioactivity.Radionuclides serve as agents in nuclear medicine and genetic engineering, play a role in computer imaging for diagnosis and experiment, and account for a percentage of background radiation to which humans are exposed. In cancer therapy, radionuclides that localise to certain organs (e.g., radioactive iodine or gallium), deliver cytotoxic radiation doses to tumours. Similarly, radionuclides can be yoked to monoclonal antibodies engineered to attack specific populations of cancerous cells. In positron emission tomography, glucose molecules tagged with radionuclides are injected into the bloodstream. The gamma radiation emitted by the decay of the radionuclides reveals areas of active glucose uptake and thus offers a gauge of cell metabolism and function. (05 Mar 2000) |
| radionuclide angiocardiography | The display, by means of a stationary scintillation camera device, of the passage of a bolus of a rapidly injected radiopharmaceutical. Synonym: radionuclide ventriculography. (05 Mar 2000) |
| radionuclide angiography | The measurement of visualization by radiation of any organ after a radionuclide has been injected into its blood supply. It is used to diagnose heart, liver, lung, and other diseases and to measure the function of those organs, except renography, for which radioisotope renography is available. (12 Dec 1998) |
| radionuclide cisternography | Scintigraphic imaging of the cisterns at the base of the brain following subarachnoid injection of a gamma-emitting radiopharmaceutical. (05 Mar 2000) |
| radionuclide generator | A column containing a large amount of a particular radionuclide (mother radionuclide) that decays down to a second radionuclide of shorter physical half-life; the daughter radionuclide is separated from the parent by the process of elution and affords a continuing supply of relatively short-lived radionuclides for laboratory use; the elution is loosely termed "milking" with the generator referred to as a "radioactive cow." (05 Mar 2000) |
| radionuclide generators | Separation systems containing a relatively long-lived parent radionuclide which produces a short-lived daughter in its decay scheme. The daughter can be periodically extracted (milked) by means of an appropriate eluting agent. (12 Dec 1998) |
| radionuclide imaging | Process whereby a radionuclide is injected or measured (through tissue) from an external source, and a display is obtained from any one of several rectilinear scanner or gamma camera systems. The image obtained from a moving detector is called a scan, while the image obtained from a stationary camera device is called a scintiphotograph. (12 Dec 1998) |
| radionuclide scan | An exam that produces pictures (scans) of internal parts of the body. The patient is given an injection or swallows a small amount of radioactive material. A machine called a scanner then measures the radioactivity in certain organs. (12 Dec 1998) |
| radionuclide ventriculography | Imaging of a ventricle of the heart after the injection of a radioactive contrast medium. The technique is less invasive than cardiac catheterization and is used to assess ventricular function. (12 Dec 1998) |
| radionuclidic purity | The proportion of the total radioactivity that is present as a specific radionuclide. (05 Mar 2000) |
| radiopacity | State of being radiopaque. Synonym: radiodensity. (05 Mar 2000) |
| radiopalmar | Relating to the radial or lateral side of the palm. (05 Mar 2000) |
| radicle |
The embryonic primary root.
출처: www.knowledgebank.irri.org/RP/growthStages/Glossar...
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| radiation absorbed dose |
The amount of ionizing radiation absorbed by a material, such as human tissue.
출처: www.nsc.org/ehc/guidebks/wippglos.htm
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| radiation |
Particles or rays emitted by radioactive substances from the unstable nuclei of their atoms. (See alpha particle, beta particle and gamma ray)
출처: www.pbs.org/wgbh/pages/frontline/shows/reaction/et...
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| radical prostatectomy |
(RAD-ih-kal pros-ta-TEK-toe-mee) Surgery to remove the entire prostate. The two types of radical prostatectomy are retropubic prostatectomy and perineal prostatectomy.
출처: www.seniormag.com/conditions/cancer/cancerglossary...
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| radiotherapy |
(RAY-dee-o-THER-a-pee) The use of high-energy radiation from x-rays, gamma rays, neutrons, and other sources to kill cancer cells and shrink tumors. Radiation may come from a machine outside the body (external-beam radiation therapy), or it may come from radioactive material placed in the body near cancer cells (internal radiation therapy, implant radiation, or brachytherapy). ...
출처: www.seniormag.com/conditions/cancer/cancerglossary...
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