Abstract
Radiation scatter leads to error in measurement of a projection that limits the image quality. The present work focuses on reconstruction error due to scattering in various types of soils and analysis was used to examine the spatial properties of scattered radiation in pencil beam geometry. EGS4 has been used (Electron–Gamma Shower), a general purpose Monte Carlo simulation package for coupled transport of electrons and photons in an arbitrary geometry. Scatter is measured in terms of the scatter-to-primary ratio ( S/ P). For a cylindrical geometry, the distribution of S/ P was calculated for several thicknesses of each soil type, the intend being to determine the significance of detected scattered radiation in tomographic image. Two different photon energies were used: 60 keV and 662 keV. The dependence of S/ P on soil diameter, chemical composition, bulk density and energy photon is presented.
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