| 单词 |
pantomography |
| 释义 |
pantomography Med.|pæntəˈmɒgrəfɪ|
[f. panoramic a. + tomography.]
A form of tomography for obtaining radiographs of curved layers of an object, spec. the teeth and jaws, by rotation of the body and film during exposure; a further modifiction of the technique is orthopantomography.
1952Y. V. Paatero in Suomen Hammaslääkäriseuran Toimituksia XLVIII. 7 Pantomography—a tomographic method for roentgenographing curved surfaces. 1954― in Acta Radiologica XLI. 321 A new method of tomographic roentgenography (which I subsequently named pantomography.) Ibid. 326 Since the roentgen beam in pantomography is relatively narrow, it is obvious that secondary radiation emanates from only a narrow portion of the object. 1956K. C. Clark Positioning in Radiog. (ed. 7) xxviii. 536/2 Pantomography..By this method of simultaneous movement of head and film in front of the slit diaphragm of the tube, a progressive panoramic view of the whole jaw is produced. 1969G. J. van der Plaats Med. X-Ray Technique (ed 3) iv. 104 Pantomography is mainly applied in dental radiography.
Hence panˈtomogram, a radiograph obtained by pantomography; panˈtomograph (see quot. 19541); ˌpantomoˈgraphic, -ˈgraphical adjs.
1952Y. V. Paatero in Suomen Hammaslääkäriseuran Toimituksia XLVIII. 7 Divergence of rays in pantomographical roentgenography. Ibid., Taking of lateral roentgenograms of jaw with the pantomographic method. 1954― in Acta Radiologica XLI. 321 Pantomograph, a device used with a normal roentgen apparatus, which produces pantomographic roentgenograms = pantomograms. Ibid., Thus, pantomographic roentgenography must be distinguished from all previous tomographic methods which produce roentgenographic representations of level surfaces. Ibid. 326 The pantomograph used rotates around its axis once every 20 seconds. |
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