| 영문 | gamma ray | 한글 | 감마선 |
|---|---|---|---|
| 설명 | 감마-붕괴로 인해 원자핵 안으로부터 방사되는 전자방사선. 같은 전자방사선인 X선과는 원자핵 밖의 현상으로 인해 발생되는 점으로 구별한다. 질량, 전하를 가지고 있지 않기 때문에 물질과의 상호작용은 알파선이나 베타선과 비교하여 매우 적으며 투과성이 매우 크다. 물질과의 상호작용은 X선의 그것과 본질적으로 차이가 없으며 에너지에 따라 톰슨산란, 광전효과, 콤튼산란, 전자쌍 생성, 광핵반응 등이 일어난다. 의료에 이용되는 것은 방사선 치료에서 60Co에 의한 외조사 또는 192Ir, 226Ra, 198Au 등으로부터의 감마선이 사용되고 감마-카메라를 사용한 핵의학 검사에서는 99mTc 등으로부터의 감마선에 의한 신티그램이 진단에 이용되고 있다. |
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| 영문 | beta ray | 한글 | 베타선 |
|---|---|---|---|
| 설명 | 방사성 원자핵이 β붕괴함에 따라 방출되는 방사선. 원자에 정상보다 많거나 적은 중성자나 양자를 가지고 있는 경우에는 원자가 안정되기 위하여 붕괴가 세가지 방법으로 생긴다. 이중 중성자가 하나의 전자를 내고 양성자가 되는 변화를 거치면서 나오는 전자선이다. 그 실체는 고속의 전자 또는 양전자이며 최대 에너지는 105-107eV. 투과력 및 이온화 작용은 α선과 γ선의 중간 정도이다. |
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| 영문 | infrared ray | 한글 | 적외선 |
|---|---|---|---|
| 설명 | 파장이 가시광선보다 길며 극초단파보다 짧은 750μm~1mm의 전자파. 눈으로는 볼 수 없고 일반적으로 공기 가운데에서 산란되기 어려우며, 가시광선보다 투과력이 강하다. 사진 적외선-근적외선-원적외선 따위로 나눌 수 있는데, 단파장 부분에는 사진 작용-형광 작용-광전 작용이 있어, 적외선 사진이나 적외선 통신-물질 감정-의료 따위에 이용한다. 1800년에 허셀이 발견되었다. 적외선은 물질에 부딛치며 구성분자의 열운동을 일으켜서 열효과를 주게되므로 열선이라고도 불린다. 태양광선의 약 52%는 적외선이다. 700~800nm의 적외선은 인체피부를 투과해서 피하에까지 이른다. 과도의 적외선 조사는 피부에 온열성홍반을 일으키게 해서 화상을 일으킬 수 있다. |
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| ABCDES | abnormal alignment, bones-periarticular osteoporosis, cartilage-joint space loss, deformities, margi... |
|---|---|
| ARRS | American Roentgen Ray Society |
| PIXE | particle-induced x-ray emission; proton-induced x-ray emission |
| rem | Roentgen Equivalent Man 1 rem = 1 rad x RBE |
| BRS | behavior rating scale; battered root syndrome; Bibliographic Retrieval Services; British Roentgen So... |
| RSA | Roentgen Stereophotogrammetric Analysis |
|---|---|
| CRT | Cathode Ray Tube |
| CXR | Chest X-ray |
| CXD | Computed X-ray Densitometry |
| DEXA | Dual Energy X Ray Absorptiometry |
| roentgen ray | <investigation> A type of irradiation used for imaging purposes that uses energy beams of very short wavelengths (0.1 to 1000 angstroms) that can penetrate most substances except heavy metals. This is the commonest form of imaging technique used in clinical practice everywhere in the world with the image captured on photographic film. An AP film is when the beams pass from front-to-back (anteroposterior) and is used for mobile film, particularly on the ward or in casualty. This is the oposite to a PA film (posteroanterior) in which the rays pass through the body from back-to-front. Most films taken in the main radiology department are PA. (20 Jun 2000) |
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| Roentgen | <radiobiology, unit> The special unit of exposure, based on a quantity of ionisation (charge) produced by the absorption of X or gamma radiation energy in a specified mass of air under standard conditions. 1R = 2.58 x 10-4 C kg-1 or air. For radiation protection purposes, an exposure to 1 roentgen of x or gamma rays (air kerma of ~10-2 J kg-1) is generally assumed to produce an absorbed dose of 1 rad in water or soft tissue. Abbreviation: R (06 Aug 1998) |
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| roentgen-equivalent | <radiobiology> A unit of dose equivalent to that quantity of ionizing radiation of any type that produces in man the same biologic effect as one rad of X-rays or gamma rays; the number of rems is equal to the absorbed dose, measured in rads, multiplied by the quality factor of the radiation in question.100 rem = 1 Sv. (05 Mar 2000) |
| roentgen-equivalent physical | <radiobiology, unit> A roentgen equivalent physical is a unit of absorbed radiation approximately equivalent to a roentgen, an international unit of x- or gamma-radiation. An obsolete unit of measurement; that quantity of ionizing radiation of any kind which, upon absorption by living tissue, produces an energy gain per gram of tissue equivalent to that produced by 1 roentgen of X-rays or gamma-rays. Acronym: rep See: rad. (05 Mar 2000) |
| Roentgen, Wilhelm | <person, radiobiology> German scientist who discovered X-rays in 1895. (13 Nov 1997) |
| actinic ray | A light ray toward and beyond the violet end of the spectrum that acts upon a photographic plate and produces other chemical effects. Synonym: chemical ray. (05 Mar 2000) |
| alpha ray | <physics> A radioactive particle made up of two protons and two neutrons, these particles are created by the decay of a radioactive material or by nuclear bombardment, and they are the same as the nucleus of a helium-4 atom. (09 Oct 1997) |
| ap, X-ray | An X-ray picture in which the beams pass from front-to-back (anteroposterior). As opposed to a PA (posteroanterior) film in which the rays pass through the body from back-to-front. (12 Dec 1998) |
| beta ray | 1. <radiobiology> Original term used for electrons (and positrons) ejected from decaying nuclei via beta emission. (Label derives from the old days when we had various kinds of radiation emission, and they were labelled alpha, beta, and gamma (the first letters of the Greek Alphabet) because no one really knew what any of them were.) 2. A stream of positive or negative electrons ejected with high energy from a disintegrating atomic nucleus; most biomedically used isotopes emit negative particles (electrons or negatrons, rather than positrons). Cathode rays are low-energy negative electrons produced in cathode ray tubes, also called television tubes or oscilloscopes. (12 Sep 2000) |
| gamma ray | <radiobiology> Electromagnetic radiation (photons) with energies greater than (roughly) 100 keV (that is, 100,000 electron volts). Gamma radiation frequently accompanies alpha and beta decays, and always accompanies fission. Gamma rays are highly penetrating and are best shielded against using dense materials, such as lead or depleted uranium. (Gamma rays are similar to X-rays, but are generally higher in energy and nuclear in origin.) Gamma rays have wavelengths of 1 nanometre or shorter. These are highly energised, deeply penetrating photons which can be emitted from an atomic nucleus during nuclear fission (the splitting of an atom) and during regular atomic decay (radioactivity). (13 Oct 1997) |
| gamma ray knife | A beam of high energy X-rays. See: radiosurgery. (05 Mar 2000) |
| panoramic X-ray | <dentistry> An X-ray taken by a machine that rotates around your head to give the orthodontist a picture of your teeth, jaws and other important information. (08 Jan 1998) |
| panoramic X-ray film | In dentistry, a radiograph taken to give a panoramic view of the entire upper and lower dental arch as well as the temporomandibular joints. (05 Mar 2000) |
| ray | <botany> A zygomorphic flower in the family Asteraceae, a radial band of cells traversing the conducting elements in woody stems. Of a compound umbel, one of the first (lower) series of branches of the inflorescence main stem. (09 Oct 1997) |
| ray grass | <botany> A perennial European grass (Lolium perenne). Synonym: rye grass, and red darnel. See Darnel, and Grass. Italian ray, or rye, grass. See Darnel, and Grass. Origin: Etymol. Of ray is uncertain. Source: Websters Dictionary (01 Mar 1998) |
| ray, light | <microscopy> The term applied to the lines perpendicular to the wavefronts of waves of light to indicate their direction of travel in an isotropic medium. Note the wave normal and the ray do not coincide in isotropic media. (05 Aug 1998) |
| roentgen ray |
X ray: electromagnetic radiation of short wavelength produced when high-speed electrons strike a solid target
출처: wordnet.princeton.edu/perl/webwn
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|---|---|
| roentgen ray |
(Or Roentgen ray.) Same as x-ray; rarely used these days. X-ray was the coinage of Wilhelm R?tgen, who discovered them. Boorse, HA, and L. Motz, 1966: The World of the Atom, Vol. I, 385?01.
출처: amsglossary.allenpress.com/glossary/browse
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| roentgen rays |
see under ray.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| roentgen ray | electromagnetic radiation of short wavelength produced when high-speed electrons strike a solid target |
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제품명 |
판매사 |
보험코드 | 성분/함량 | 구분/보험급여 |
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제품명 |
판매사 |
보험코드 | 성분/함량 | 구분/보험급여 |
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