Modelling of an X-ray image-intensifier-based radiography system

Article type: Research Article

Authors: Mångård, Måns | Hammersberg, Peter | Sandborg, Michael

Affiliations: Department of Mechanical Engineering, Division of Engineering Materials, Linköpings Universitet, Sweden | Division of Radiation Physics, Faculty of Health Sciences, Linköpings Universitet, Sweden

Note: [] Corresponding author.

Abstract: A model will be proposed for predicting the expected value and variance of the measured signal-level in collected radiographic images obtained with an image-intensifier-based X-ray radiography system. The model parameters are determined from both theoretical and experimental data and incorporate all parameters that can be varied by the system operator, except CCD-camera readout rate. The proposed model predicts the expected value and variance of the grey-level in the output image with high accuracy. It is also shown that it is very important to compensate for the inhomogeneous pixel sensitivity when comparing the variance of the signal-level in a pixel from sequentially collected images with the variance determined in a single image.

Keywords: Image intensifier, X-ray radiography, modelling

Journal: Journal of X-Ray Science and Technology, vol. 8, no. 1, pp. 31-50, 1998