10.14489/td.2018.10.pp.032-037

2018, 10 October

DOI: 10.14489/td.2018.10.pp.032-037

Galkin D. I.
EVALUATION OF INFORMATIVITY OF X-RAY IMAGES
(pp. 32-37)

Abstract. The article deals with the issues of preservation of the image obtained by X-ray inspection (RС) when changing the geometric factors of exposure and the type of the detecting system. It is shown that the resolving power of the image is determined by the aggregate frequency-contrast characteristic, taking into account the influence of geometric factors and the type of detection system. To demonstrate the effect of sharpness (contrast) of the image on its information content, an experiment was carried out, which consists in exposing a defective welded joint with a consecutive decrease in the focal length. According to the results of the experiment, it is concluded that the basic spatial resolution is sensitive to changes in the information content of the image. This fact makes it possible to use a duplex wire image quality identificator to evaluate the possibility of replacing the film technology of the RC with a digital or сomputed one.

Keywords: digital radiography, сomputed radiography, basic spatial resolution, duplex wire image quality identificator, usharpness, contrast ratio.

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D. I. Galkin (RIIMSIA “Spectrum”, Moscow, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

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1. Kononov N. K., Ignatov S. M., Potapov V. N. et al. (2006). Digital system for obtaining X-ray images with high target resolution. Pribory i tekhnika eksperimenta, (5), pp. 156-159. [in Russian language]
2. Sidulenko O. A. (2013). Current state and directions for improving radiation monitoring technologies. Ekspozitsiya Neft' GAZ, (3), pp. 14-16. [in Russian language]
3. Lozhkova D. S., Stepanov A. V., Kosarina E. I. (2011). Computer radiography, results of practical research and the possibility of replacing film technologies. Vestnik MEI, (3), pp. 57-62. [in Russian language]
4. Zhukov A. D., Galkin D. I., Ivanayskiy E. A. (2018). On the question of replacing the radiographic film with digital detectors. Vestnik MGTU im. N. E. Baumana. Seriya Mashinostroenie, (1), pp. 47-56. DOI: 10.18698/0236-3941-2018-1-47-56. [in Russian language]
5. Maslov A. I., Artem'ev B. V., Gusev V. E. et al. (2004). The main factors affecting the resolution in the radiographic inspection of welded pipe joints. Modern automated means of X-ray thickness measurement of rolling products of metallurgy. Kontrol' i diagnostika, (2), pp. 55-64. [in Russian language]
6. Nam I. F., Rozhnev M. A., Ryabkov S. A., Tyazhev A. V. (2006). Technical characteristics of digital X-ray systems and methods for measuring them. International Siberian Workshopand Tutorialson Electron Devicesand Materials (Erlagol, Altay-July 1-5, 2006), (IEEE Catalog N 06EX 1337, ISSN 5-7782-0646-1, ISSN 18153712).
7. Usachev E. Yu., Usachev V. E, Gnedin M. M. et al. (2014). Complex of digital radiography for the revision of welded joints of operating pipelines. Kontrol'. Diagnostika, (6), pp. 60-64. [in Russian language] DOI: 10.14489/ td.2014.06.pp.060-064
8. Gurvich A. M. (1989). Physical basis of radiation monitoring and diagnostics. Moscow: Energoatomizdat. [in Russian language]
9. Dobromyslov V. A. (1999). Radiation methods of nondestructive testing. Moscow: Mashinostroenie. [in Russian language]
10. Non-destructive testing. Flaw detection methods. Application area. (1982). Ru Standard No. GOST 20426–82. Moscow: Izdatel'stvo standartov. [in Russian language]
11. Non-destructive testing. Welded joints. Radiographic method. (1982). Ru Standard No. GOST 7512–82. Moscow: Izdatel'stvo standartov. [in Russian language]
12. ISO 19232-5:2013. (2013). Determination of the image unsharpness value using duplex wire – type image quality indicators.
13. Kosarina E. I., Krupnina O. A., Demidov A. A. et al. (2017). Digital radiography in nondestructive testing of aviation equipment. Aviatsionnye materialy i tekhnologii, (S), pp. 562-574. [in Russian language]
14. Non-destructive testing of welded joints. Radiographic monitoring. Part 1. Methods of X-ray and gammaray control using a film. (2018). Ru Standard No. GOST ISO 17636-1–2017. Moscow: Standartinform. [in Russian language]

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DOI: 10.14489/td.2018.10.pp.032-037

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