Radiographs simulation using system MTF

Koenig, A.; Glie`re, A.
May 2000
AIP Conference Proceedings;2000, Vol. 509 Issue 1, p643
Academic Journal
Sindbad is a software package dedicated to the simulation of the radiographic process. It is used during the design stage of NDE systems or as a help in defect detection assessment. As spatial resolving power is essential to determine detection limits of a radiographic system, a Modulation Transfer Function (MTF) based blurring module has been developed. MTF is a widespread concept and a useful mathematical tool describing the system spatial frequency response. The whole system MTF can be simply built from the MTF of the different system components, such as the x-ray source and the detector. The x-ray source MTF model is based on the convolution of the energy image, simulated assuming the source is punctual, with a focal spot size dependent gaussian kernel. The MTF of the detector is taken into account as follows. The 2D MTF is built from available measurements or model results. The synthetic image is then obtained by convolution. Experimentation were carried out in order to check the validity of the module. Measurement of the MTF of a radiographic system was performed and radiographs of simple objects were acquired. The agreement between actual and simulated radiographs is good. © 2000 American Institute of Physics.


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