| 释义 |
thermography
ther·mog·ra·phy T0158000 (thər-mŏg′rə-fē)n. pl. ther·mog·ra·phies 1. A process for producing raised lettering, as on stationery or calling cards, by application of a powder that is fused by heat to the fresh ink.2. A technique in which an infrared camera is used to measure temperature variations on the surface of a structure or body part, used diagnostically to produce images that reveal sites of abnormal tissue growth.
ther′mo·graph′ic (-mə-grăf′ĭk) adj.ther′mo·graph′i·cal·ly adv.thermography (θɜːˈmɒɡrəfɪ) n1. (Printing, Lithography & Bookbinding) any writing, printing, or recording process involving the use of heat2. (Printing, Lithography & Bookbinding) a printing process which produces raised characters by heating special powder or ink placed on the paper3. (Medicine) med the measurement and recording of heat produced by a part of the body: used in the diagnosis of tumours, esp of the breast (mammothermography), which have an increased blood supply and therefore generate more heat than normal tissue. See also thermogram therˈmographer n thermographic adjther•mog•ra•phy (θərˈmɒg rə fi)
n. 1. a technique for imitating an embossed appearance, as on stationery, by fusing wet ink and an adhesive powder to the paper by heat. 2. a technique for measuring regional skin temperatures, used esp. as a screening method for detection of breast cancer. [1830–40] ther•mog′ra•pher, n. ther•mo•graph•ic (ˌθɜr məˈgræf ɪk) adj. ther`mo•graph′i•cal•ly, adv. thermography1. Engineering, a method of measuring surf ace temperatures by using luminescent materials.
2. a printing or photocopying process using infrared rays and heat.
3. a process of photography using far-infrared radiation; thermal photography. — thermographer, n. — thermographic, adj.See also: Heat
a technique for imitating an engraved appearance, as on business cards, by dusting areas already printed with a powder attracted only to the inks and using heat to fuse the ink and powder. — thermographer, n. — thermographic, adj.See also: PrintingthermographyA diagnostic method of examining the inside of the body using a heat-sensitive cameraThesaurus| Noun | 1. | thermography - diagnostic technique using a thermograph to record the heat produced by different parts of the body; used to study blood flow and to detect tumorsdiagnostic procedure, diagnostic technique - a procedure followed in making a medical diagnosismammothermography - the use of thermography to detect breast tumors (which appear as hot spots) |
Translationsthermography
thermography (thûr'mŏg`rəfē), contact photocopying process that produces a direct positive image and in which infrared rays are used to expose the copy paper. In a specially designed machine the original is placed in contact with a copy paper containing a heat-sensitive substance. As the infrared rays produced in the machine impinge on the dark or printed regions of the original, the heat generated is transferred to the adjoining areas of the sensitive paper. These areas become dark as well, creating an image of the original. As infrared rays are difficult to focus, the image formed is lacking in sharpness, resolution, and detail. The copies remain sensitive to heat, so that they may darken further with age. The advantages of this process are that it is low in cost and fast and can be performed with simple equipment.Thermography (1) In the broad sense, the recording of the heat field of objects—that is, the field of their infrared radiation. (2) See (in photocopying).
Thermography (in photocopying), a copying process based on the ability of heat-sensitive materials to change their state under the action of heat—in this case, infrared radiation. In the case of direct, or thermochemical, copying, copies are made by the contact method on thermal copy paper, using transillumination or reflected radiation. In transfer copying, copies are produced on a copy base, using thermal copy paper or film. In both cases, copies may be made from originals in india ink or black pencil or from typewritten or typeset material; the elements of such originals are capable of intense absorption of heat. Upon exposure to infrared radiation, the light—that is, blank—portions of the original reflect most of the rays, whereas the dark portions absorb the rays and thus are heated. In contact thermography, heat from a heated element of the original causes a chemical reaction in the sensitive layer of the thermal copy paper, with which it is in contact, resulting in the formation of a dark contrast substance. In transfer thermography, the sensitive layer of a thermoplastic film or thermal copy paper melts under the action of heat and is transferred to the copy base. Copies on thermal copy paper darken with time as a consequence of the action of heat and light on the nonprinting elements, which remain heat-sensitive; therefore, the storage life of such copies is limited. Thermoplastic copying makes possible the production of printing plates to be used in small-job printing; in addition, it makes possible the production of copies for prolonged storage. REFERENCEAlferov, A. V., I. S. Reznik, and V. G. Shorin. Orgatekhnika. Moscow, 1973.A. IA. MANTSEN thermography[thər′mäg·rə·fē] (engineering) A method of measuring surface temperature by using luminescent materials: the two main types are contact thermography and projection thermography. (graphic arts) A photocopying process in which the original copy is placed in contact with a transparent sheet and is exposed to infrared rays; heat from carbon or a metallic compound in the text ink then causes a chemical change in a substance laminated between the transparent sheet of paper and a white waxy back. Photography that uses radiation in the long-wavelength far-infrared region, emitted by objects at temperatures ranging from -170°F (-112°C) to over 300°F (149°C). Also known as thermal photography. (medicine) A medical imaging technique based on detection of heat emitted by the body. thermographyThe process of converting temperature changes of a scanned scene into a visual picture.thermography
thermography [ther-mog´rah-fe] a technique wherein an infrared camera photographically portrays the body's surface temperature, based on self-emanating infrared radiations; used as a diagnostic aid in the detection of breast tumors and the assessment of rheumatic joints; also used in the study of pain. adj., thermograph´ic.ther·mog·ra·phy (ther-mog'ră-fē), The technique for making a thermogram.thermography (thər-mŏg′rə-fē)n. pl. thermogra·phies 1. A process for producing raised lettering, as on stationery or calling cards, by application of a powder that is fused by heat to the fresh ink.2. A technique in which an infrared camera is used to measure temperature variations on the surface of a structure or body part, used diagnostically to produce images that reveal sites of abnormal tissue growth.
ther′mo·graph′ic (-mə-grăf′ĭk) adj.ther′mo·graph′i·cal·ly adv.thermography Imaging An abandoned method for diagnosing breast CA based on an ↑ warmth of skin overlying malignancy; heat is a relatively nonspecific finding that also occurs in mastitis; the technique was abandoned due to the unacceptably high rates of false positivity and false negativity; it has no role in breast CA diagnostics. Cf Mammography, Xeroradiography. ther·mog·ra·phy (thĕr-mog'ră-fē) The technique for making a thermogram. thermography A scanning technique in which temperature differences on the surface of the skin are represented as an image or as colour differences. Thermography readily demonstrates areas of inflammation and variations in blood supply, but has not proved particularly useful as an aid to diagnosis.ther·mog·ra·phy (thĕr-mog'ră-fē) The technique for making a thermogram. thermography
Related to thermography: infrared thermographyWords related to thermographynoun diagnostic technique using a thermograph to record the heat produced by different parts of the bodyRelated Words- diagnostic procedure
- diagnostic technique
- mammothermography
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