Scattering Correction in Cone Beam Computed Tomography using Scatter Kernel Superposition

International Symposium on Digital Industrial Radiology and Computed Tomography Ghent, Belgium June 22-25, 2015 SKS deconvolution method corrects scatter per projection by convoluting the measured signal with the pencil beam kernels using equation (1), simulated by varying thickness of the slabs of same material as the object in the CIVA [2] RT module developed for NDT simulations by CEA. The weight of the kernel is the ratio of scatter at each pixel of the detector to the primary at the pencil beam centred pixel. The kernels obtained are fitted to equation (3) [3] formed with amplitude factor given by equation (4) and form function given by equation (5) made of two symmetric gaussian functions. Only a few thickness kernels are simulated, for the rest of the kernels parameters A, B, α, β, σ1 and σ2 are interpolated in order to evaluate the advantage of continuous kernels approach.