| 영문 | positron emission tomography | 한글 | 양전자방출 단층촬영 |
|---|---|---|---|
| 설명 | 핵의학적 진단방법중 하나. 가장 발달된 형태의 핵의학적 진단방법이다. 양전자를 방출함으로써 생기는 핵의학적 방사능을 이용하여 인체의 단면을 촬영할 수 있다. 이것은 마치 컴퓨터단층촬영과 유사하나, 조영제와 X-선을 사용하지 않는다는 점에서 다르다. 이용하는 핵의학적 물질을 인체내에서 대사가능한 물질(예를 들어 포도당, 혹은 지방)에 붙여서 사용함으로써, 실제적으로 살아있는 생체내에서 어떤 형태로 대사가 이루어지는 지 알아낼 수도 있다. 예를 들면, 눈을 뜨고 어떤 물체를 주시할 때, 뇌의 어떤 부위가 가장 활발한 대사작용을 하는지 알 수 있다. |
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| 영문 | standard error | 한글 | 표준오차 |
|---|---|---|---|
| 설명 | 통계용어로 표본 평균치 분포의 표준편차를 나타내는 것이다. 표본 평균치가 모집단의 평균치 주위에 산재하는 것은 표본 크기와 모집단의 표준편차(σ)에 의해 지배된다. 표준오차(SD)는 이론적으로 σ/√N으로 나타낸다. |
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| SE | saline enema; sanitary engineering; side effect; smoke exposure; solid extract; sphenoethmoidal; spi... |
|---|---|
| PIXE | particle-induced x-ray emission; proton-induced x-ray emission |
| FSE | fast spin echo; filtered smoke exposure |
| NSD | Nairobi sheep disease; neonatal staphylococcal disease; neurosecretory dysfunction; night sleep depr... |
| SEM | sample evaluation method; scanning electron microscopy; secondary enrichment medium; standard error ... |
| CS | Cigarette smoke |
|---|---|
| CSC | Cigarette smoke condensate |
| ETS | Environmental Tobacco Smoke |
| TS | Tobacco smoke |
| BS | black smoke |
standard error
| emission standard | This regulatory value is a quantitative limit on the emission or discharge of a potentially toxic substance from a source. The simplest form for regulatory purposes is a uniform emission standard (UES) where the same limit is placed on all emissions of a particular contaminant. (09 Oct 1997) |
|---|---|
| smoke | 1. To apply smoke to; to hang in smoke; to disinfect, to cure, etc, by smoke; as, to smoke or fumigate infected clothing; to smoke beef or hams for preservation. 2. To fill or scent with smoke; hence, to fill with incense; to perfume. "Smoking the temple." 3. To smell out; to hunt out; to find out; to detect. "I alone Smoked his true person, talked with him." (Chapman) "He was first smoked by the old Lord Lafeu." (Shak) "Upon that . . . I began to smoke that they were a parcel of mummers." (Addison) 4. To ridicule to the face; to quiz. 5. To inhale and puff out the smoke of, as tobacco; to burn or use in smoking; as, to smoke a pipe or a cigar. 6. To subject to the operation of smoke, for the purpose of annoying or driving out; often with out; as, to smoke a woodchuck out of his burrow. 1. The visible exhalation, vapor, or substance that escapes, or expelled, from a burning body, especially from burning vegetable matter, as wood, coal, peat, or the like. The gases of hydrocarbons, raised to a red heat or thereabouts, without a mixture of air enough to produce combustion, disengage their carbon in a fine powder, forming smoke. The disengaged carbon when deposited on solid bodies is soot. 2. That which resembles smoke; a vapor; a mist. 3. Anything unsubstantial, as idle talk. 4. The act of smoking, especially. Of smoking tobacco; as, to have a smoke. Smoke is sometimes joined with other word. Forming self-explaining compounds; as, smoke-consuming, smoke-dried, smoke-stained, etc. Smoke arch, the smoke box of a locomotive. Smoke ball, a small sail in the lee of the galley stovepipe, to prevent the smoke from annoying people on deck. <botany> Smoke tree, a shrub (Rhus Cotinus) in which the flowers are mostly abortive and the panicles transformed into tangles of plumose pedicels looking like wreaths of smoke. To end in smoke, to burned; hence, to be destroyed or ruined; figuratively, to come to nothing. Synonym: Fume, reek, vapor. Origin: AS. Smoca, fr. Smeocan to smoke; akin to LG. & D. Smook smoke, Dan. Smog, G. Schmauch, and perh. To Gr. To burn in a smoldering fire; cf. Lith. Smaugti to choke. Source: Websters Dictionary (01 Mar 1998) |
| smoke inhalation injury | Pulmonary injury following the breathing in of toxic smoke from burning materials such as plastics, synthetics, building materials, etc. This injury is the most frequent cause of death in burn patients. (12 Dec 1998) |
| tobacco smoke pollution | Contamination of the air by tobacco smoke. (12 Dec 1998) |
| environmental tobacco smoke | A complex mixture of chemical constituents and particulates released into the atmosphere from the burning tip of a cigarette, pipe or cigar or from smoke exhaled by the smoker. (09 Oct 1997) |
| alpha emission | <physics> Form of nuclear decay where the nucleus emits an alpha particle (see entry below). (09 Oct 1997) |
| beta emission | <radiobiology> Form of nuclear decay where a neutron splits into a proton plus electron plus neutrino set. The proton stays in the nucleus but the electron (beta ray) is ejected. (09 Oct 1997) |
| gamma emission | <physics> Nuclear decay process whereby the nucleus goes from an excited state to a more stable state by emitting a gamma ray. See: gamma ray. (09 Oct 1997) |
| particulate emission | Fine liquid or solid particles discharged with exhaust gases. Usually measured as grains per cubic foot or pounds per million Btu input. (05 Dec 1998) |
| characteristic emission | Monochromatic radiation that is produced when an electron is ejected from an atom and another takes its place by jumping from another shell; the energy of the photon is the difference between that of the two shell positions. Synonym: characteristic emission. (05 Mar 2000) |
| microscope, field emission | <microscopy> An image-forming device in which a strong electrostatic field causes cold emission of electrons from a sharply rounded point or from a specimen that has been placed on that point. The electrons are accelerated to a phosphorescent screen, or photographic film, giving a visible picture of the variation of emission over the specimen surface. (05 Aug 1998) |
| positron emission tomography | <radiology> A highly specialised research imaging technique using short lived radioactive substances - usually those made with a cyclotron. This technique is very sensitive in picking up active tumour tissue but does not measure the size of it. Tomographic images are formed by computer analysis of photons detected from annihilation of positrons emitted by radionuclides incorporated into biochemical substances; the images, often quantitated with a colour scale, show the uptake and distribution of the substances in the tissue, permitting analysis and localization of metabolic and physiological function. Because the half-lives of the radionuclides are so short (20 minutes to 2 hours), and the equipment expensive, PET is rarely used in a clinical setting. But since its development in the mid-1970s, it has proved the most important tool yet devised for experimental investigation of the living brain, whether healthy, traumatised, or diseased. With CT and MRI, it represents a new generation of computer imaging techniques that have revolutionised medicine and physiology. Acronym: PET (20 Jun 2000) |
| single photon emission computed tomography | <radiology> Tomographic imaging of metabolic and physiological functions in tissues, the image being formed by computer synthesis of photons of a single energy emitted by radionuclides administered in suitable form to the patient. The method uses radionuclides which emit a single photon of a given energy. The camera is then rotated 180 or 360 degrees around the patient to capture images at multiple positions along the arc. The computer then reconstructs the transaxial, sagittal, and coronal images from the 3-dimensional distribution of radionuclides in the target area scanned. The advantages of SPECT are that it can be used to observe biochemical and physiological processes as well as the size and volume of the organ. The disadvantage is that, unlike positron emission tomography where the positron-electron annihilation results in the emission of 2 photons at 180 degrees from each other, SPECT requires physical collimation to line up the photons, which results in the loss of available photons and hence degrades the image. Acronym: SPECT (20 Jun 2000) |
| source emission reduction plan | (SERP) A contingency plan developed to reduce emissions during an air quality emergency. (05 Dec 1998) |
| spectrometry, X-ray emission | Identification and measurement of concentration of elements based on the fact that X-rays emitted by an excited element have a wavelength characteristic of that element and an intensity related to its concentration. It includes fluorescence, or secondary-emission, X-ray spectrometry, in which the specimen is irradiated by X-rays. Primary-emission x-ray spectrometry, in which the specimen is bombarded by electrons, is a specific type of X-ray emission spectrometry known as electron probe microanalysis. (12 Dec 1998) |
제품명 |
판매사 |
보험코드 | 성분/함량 | 구분/보험급여 |
|---|
제품명 |
판매사 |
보험코드 | 성분/함량 | 구분/보험급여 |
|---|