Formation of Radiation Defect Images with Radiation Nondestructive Testing

In radiation nondestructive testing an important task is both practical and theoretical estimate of contrast sensitivity. The theoretical estimate helps to predict testing capabilities and results depending on the selected scheme and the X-ray source and control object parameters. Application of spectral method allows us to estimate the frequency-contrast characteristics of radiation nondestructive testing systems. We made a mathematical model of forming the spatial spectrum of the radiation image. The analysis of this mathematical model helps to set an analytical relationship between such a parameter of the radiation source, as the size of the focal spot and size of the defect in a plane perpendicular to the beam axis. With a focal length of 700 mm and thickness of 10 mm in the control object, we defined the minimum size of defects reconstructed on the radiation and optical (X-ray and fluoroscopic) images.

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