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http://dx.doi.org/10.12654/JCS.2018.34.6.09

Characteristics and Influence of Scattering Radiation in Cultural Heritage Radiography  

Song, Jung Il (Cultural Heritage Conservation Science Center, National Research Institute of Cultural Heritage)
Park, Young Hwan (Cultural Heritage Conservation Science Center, National Research Institute of Cultural Heritage)
Yu, Ji Hye (Cultural Heritage Conservation Science Center, National Research Institute of Cultural Heritage)
Publication Information
Journal of Conservation Science / v.34, no.6, 2018 , pp. 539-548 More about this Journal
Abstract
This study was conducted to evaluate the effects of scattering radiation, which was not considered in the cultural Heritage radiography, by evaluating the relationship between the tube voltage (unit: kVp), film-floor-distance(FFD), and lead screen layout. The density (unit: D) of the test specimens and the scattered radiation increased with the tube voltage. The density of the test specimens showed an average deviation of 1.4 D; it was 0.17 D at 60 kVp, 1.54 D at 160 kVp, and 2.97 D at 220 kVp. The mean density of the scattered radiation was 0.10 D at 60 kVp, 0.40 D at 160 kVp, and 0.46 D at 220 kVp. The density tended to increase when the tube voltage ranged between 60 kVp and 160 kVp, as the FFD distance increased. However, a change in the permeation density was not observed for high voltages(160 kVp-220 kVp). Scattered radiation was observed when FFD was 50 mm, 100 mm, and 200 mm and no lead screen was used and the bottom surface was replaced with the lead screen. No scattered radiation was observed when FFD was 0 mm. The identification rate ranged from 2.08% to 2.67%, according to the FFD, for a 160 kVp tube voltage, and from 2.67% to 3.33% for a 220 kVp tube voltage.
Keywords
Cultural heritage radiography; Scattered radiation; Back-scattering; X-ray; Density;
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