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Scatter correction using pair-wise fan beam consistency conditions
Author(s): Shiras Abdurahman; Robert Frysch; Georg Rose
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Paper Abstract

Due to wide cone angle, the artifacts caused by scatter radiation are inevitable in flat detector CT reconstructed images. Cupping and streak artifacts are the main manifestations of scatter artifacts which will degrade low contrast resolution and Hounsfield unit accuracy. Scatter artifacts can be mitigated by subtracting the two-dimensional distribution of scatter radiation from the measured projections. Convolution-based scatter modeling can be used for the approximate scatter estimation with a high degree of computational efficiency. In this paper, we propose an algorithm to optimize the scatter kernel parameters by enforcing pair-wise fan beam consistency conditions on cone beam projections. The proposed method does not require prior Monte-Carlo simulation, additional reconstruction, or calibration experiments. Our results from the simulated datasets show the reduction of artifacts after the minimization of scatter-induced data inconsistency.

Paper Details

Date Published: 28 May 2019
PDF: 5 pages
Proc. SPIE 11072, 15th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine, 110722I (28 May 2019); doi: 10.1117/12.2534671
Show Author Affiliations
Shiras Abdurahman, Univ. of Magdeburg (Germany)
Robert Frysch, Univ. of Magdeburg (Germany)
Georg Rose, Univ. of Magdeburg (Germany)


Published in SPIE Proceedings Vol. 11072:
15th International Meeting on Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine
Samuel Matej; Scott D. Metzler, Editor(s)

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