| 释义 |
microradiography|ˌmaɪkrəʊreɪdɪˈɒgrəfɪ|
[ad. F. microradiographie (P. Goby 1913, in Compt. Rend. CLVI. 686): see micro- 2 a and radiography.]
Radiography of the fine structure of an object.
1913P. Goby in Jrnl. R. Microsc. Soc. 373 The new method of employment of X-rays, which I have the honour of introducing to you under the name of Microradiography, aims at rendering easily visible the internal structure of microscopic objects. 1944Jrnl. Appl. Physics XV. 44/1 The early work on microradiography was confined chiefly to light alloys and made use of low voltage, long wave-length radiation. 1966D. G. Brandon Mod. Techniques Metallogr. 76 The two major advantages offered by microradiography as opposed to ordinary optical metallography are, firstly, the sensitivity to chemical composition and, secondly, the ability of the technique to integrate over a large volume of material. 1973Calcified Tissue Res. XI. 176 This work investigated the effect of fluoride on the mineralization of rat dentine using tetracycline-labelling and microradiography.
Hence microˈradiogram, the original image obtained on a sensitive plate or film in microradiography; microˈradiograph, a photographic enlargement of a microradiogram; ˌmicroradioˈgraphic a., of or obtained by microradiography.
1913Jrnl. R. Microsc. Soc. 375 Plate XVI is a reproduction of a micro-radiogram, enlarged nineteen times, of the anterior and posterior limbs of the three-toed lizard. 1944Jrnl. Appl. Physics XV. 43 Investigations have been made of the various factors considered to influence the sensitivity of the microradiographic method for the examination of alloys. Ibid. 52 (caption) Microradiographs of cartridge brass with Co radiation at 20 kv at 75 ×. 1957A. Engström in V. E. Cosslett et al. X-Ray Microsc. & Microradiogr. 32 In order to take care of the inhomogeneous distribution of the absorbing material, various types of scanning photometry of the microradiogram are now being used. 1966D. G. Brandon Mod. Techniques Metallogr. 76 The detail seen in a microradiograph is projected from a slab of metal up to 0·1 mm in thickness. 1969Hobdell & Boyde in Möllenstedt & Gaukler Internat. Symposium X-Ray Optics & Microanalysis 611 The interpretation of the microradiographic image was found to be in good correlation with the interpretation of the scanning electron microscopic image of bone surfaces. |