A patient-specific scatter artifacts correction method

Wei Zhao; Stephen Brunner; Kai Niu; Sebastian Schafer; Kevin Royalty; Guang-Hong Chen

doi:10.1117/12.2043923

19 March 2014 A patient-specific scatter artifacts correction method

Wei Zhao, Stephen Brunner, Kai Niu, Sebastian Schafer, Kevin Royalty, Guang-Hong Chen

Proceedings Volume 9033, Medical Imaging 2014: Physics of Medical Imaging; 903310 (2014) https://doi.org/10.1117/12.2043923
Event: SPIE Medical Imaging, 2014, San Diego, California, United States

Abstract

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.

Citation Download Citation

Wei Zhao, Stephen Brunner, Kai Niu, Sebastian Schafer, Kevin Royalty, and Guang-Hong Chen "A patient-specific scatter artifacts correction method", Proc. SPIE 9033, Medical Imaging 2014: Physics of Medical Imaging, 903310 (19 March 2014); https://doi.org/10.1117/12.2043923

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