COMPARATIVE ANALYSIS OF DIRECT AND COMPUTED RADIOGRAPHY FOR BRASS STEP WEDGES
Keywords:
Image Quality, Direct Radiography, Computer Radiography, BrassAbstract
This study investigates the differences in image quality between Direct Radiography (DR) and Computed Radiography (CR) when applied to brass step wedges. Radiography was performed using plate (CR) and digital panel (DR) detectors to establish radiographic procedures for brass materials. The study involved radiographing a brass step wedge specimen with X-ray machine at 5 mA current and an SFD of 930 mm. The voltage (kV) was selected within the range of 100-140 kV, with exposure time adjusted based on the material thickness, which ranged from 2 mm to 9 mm. Digital radiographic images were analyzed using Rhythm Review software to compare the grey value and sensitivity. The results showed the smallest grey value deviation of 0.043% at 3 mm, 5 mm, and 7 mm thickness using DR, while the largest grey value deviation of 0.102% occurred at 4 mm thickness using CR. The best sensitivity was achieved with DR (1.59%) compared to CR (4.64%). Based on these results, it is recommended to use DR for radiographic procedures on brass due to its superior image quality compared to CR. These findings contribute to better selection of radiographic techniques for brass material inspections in industrial applications
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