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http://dx.doi.org/10.7742/jksr.2021.15.5.731

Comparison Research of SNR and SRb with Bright Calibration and Multi Frame Images in Digital Radiography of Welded Test Components  

Nam, Mun-Ho (Technical Research Institute of Korea Industrial Testing)
Yang, Jin-Wook (Technical Research Institute of Korea Industrial Testing)
Cho, Kap-Ho (Technical Research Institute of Korea Industrial Testing)
Publication Information
Journal of the Korean Society of Radiology / v.15, no.5, 2021 , pp. 731-739 More about this Journal
Abstract
This work compared the bright calibration of digital radiation with signal-to-noise ratio and basic spatial resolution according to multi frame to enable effective inspection of welding parts of structures at industrial sites. A total of 130 images were obtained by using a 75Se radiation source for flat weld test pieces and segmenting bright calibration and multi frame prior to shooting. The study confirms that the signal-to-noise ratio improves as the number of bright calibrations and the number of multi frame increases. The basic spatial resolution satisfied the baseline for both radiographic images. It was confirmed that the number of signal-to-noise ratio was similar by comparing images taken after installing lead shielding for scattering radiation. Although signal-to-noise ratio increases as multi frame increases, it is believed that good quality digital radiographs can be obtained if appropriate radiographic techniques are devised because exposure time of radiation affects workers' exposure and work efficiency.
Keywords
Digital Radiography; Basic Spatial Resolution; Signal to Noise Ratio;
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