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.
@article{arxiv.1501.04408,
title = {A patient-specific scatter artifacts correction method},
author = {Wei Zhao and Stephen Brunner and Kai Niu and Sebastian Schafer and Kevin Royalty and Guang-Hong Chen},
journal= {arXiv preprint arXiv:1501.04408},
year = {2015}
}