Determination of Optimum X-Ray Tube Output Parameters kV and mA for Digital Radiography Testing of Welded Tubes

Study of Image quality parameters like Contrast, SNR and MTF for Digital Radiography with FPD were carried out at different X-Ray tube variables like energy of X-Ray (kV) and tube current (mA) for different welded tube thicknesses. Experiments of Digital Radiography were carried out on butt welded tubes. Images of these welded tubes were taken with different kV and mA on actual working setup keeping other variables constant. Percentage contrast was calculated with ASTM hole type IQI, SNR values noted on welded area of interest and MTF curves were plotted by using Duplex IQI EN 462-5. This study has been done to determine optimum parameters (kV and mA) for Digital Radiography of different tube thicknesses which gives desired image quality with minimum exposure to FPD.