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28 May 2019 Beam hardening correction using pair-wise fan beam consistency conditions
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Proceedings Volume 11072, 15th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine; 110721T (2019) https://doi.org/10.1117/12.2534678
Event: Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, 2019, Philadelphia, United States
Abstract
The polychromatic X-ray spectrum and the energy-dependent material attenuation coefficients generate beam hardening artifacts in CT reconstructed images. The artifacts can be corrected by projection linearization using polynomials. Recently, consistency conditions derived from Grangeat’s fundamental relation have been successfully employed for estimating the correction polynomials without calibration or prior knowledge. In this paper, we show that the polynomials can also be computed by enforcing pair-wise fan beam consistency conditions on cone beam projections. Our preliminary results from simulation and real data experiments show the significant reduction of first-order artifacts after correction with the proposed method.
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Shiras Abdurahman, Robert Frysch, Steffen Melnik, and Georg Rose "Beam hardening correction using pair-wise fan beam consistency conditions", Proc. SPIE 11072, 15th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, 110721T (28 May 2019); https://doi.org/10.1117/12.2534678
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