  This paper provides a fast and patient-specific scatter artifact correction
method for cone-beam computed tomography (CBCT) used in image-guided
interventional procedures. Due to increased irradiated volume of interest in
CBCT imaging, scatter radiation has increased dramatically compared to 2D
imaging, leading to a degradation of image quality. In this study, we propose a
scatter artifact correction strategy using an analytical convolution-based
model whose free parameters are estimated using a rough estimation of scatter
profiles from the acquired cone-beam projections. It was evaluated using Monte
Carlo simulations with both monochromatic and polychromatic X-ray sources. The
results demonstrated that the proposed method significantly reduced the
scatter-induced shading artifacts and recovered CT numbers.
