Objective To explore the quality control method for accurate detector dose indicator(DDI)using signal transfer property(STP)in digital radiography(DR)equipment.Methods Use STP to fit the regression curve and obtain the formula for calculating the dose and DDI value or pixel value.Calculate the baseline value corresponding to the incident air release energy of the image receiver at 10 μGy.Results The logarithmic correlation formula between dose and pixel value of SYNTHESIS DR camera is y=-1455ln(x)+7311.1,regressing to dose x=10 μGy,the pixel value y=3961.The linear response formula between dose and pixel value for the Brivo XR515 DR camera is y=140.33x-2.3445,regressing to dose x=10 μGy,obtain the accurate pixel value y=1401.Conclusion This method can accurately complete the DDI project of DR equipment acceptance testing and status detection,and obtain objective and accurate evaluation.
Digital radiographyQuality controlAcceptance testingDetector dose indicatorSignal transfer propertyDR baseline value
维普
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