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9 March 2018 Scatter correction for multi-slice CT system
Yang Wang, Karl Stierstorfer, Martin Petersilka, Michael Grasruck, Yi Tian
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Proceedings Volume 10573, Medical Imaging 2018: Physics of Medical Imaging; 105733K (2018) https://doi.org/10.1117/12.2293117
Event: SPIE Medical Imaging, 2018, Houston, Texas, United States
Abstract
Scatter radiation in multi-slice CT system nowadays is playing a more and more important role, as the slice number is getting larger and larger, e.g. from 16 to 64 and even more. Scatter radiation may downgrade image quality e.g. create inhomogeneity and decrease the image contrast. Although in current multi-slice CT, anti-scatter collimation is widely used to reduce the scatter radiation received, as the detector is getting wider, its efficiency is getting weaker. Although beam hardening correction can somehow guarantee image homogeneity, as beam hardening effect and scatter radiation have different physical origin, a delegated scatter correction algorithm is desired. In this paper, we would like to propose a scatter correction algorithm working during data pre-processing before image reconstruction. After we implemented this algorithm in Siemens latest released Somatom Go. CT system, we obtain good image quality especially under certain clinical cases.
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Yang Wang, Karl Stierstorfer, Martin Petersilka, Michael Grasruck, and Yi Tian "Scatter correction for multi-slice CT system", Proc. SPIE 10573, Medical Imaging 2018: Physics of Medical Imaging, 105733K (9 March 2018); https://doi.org/10.1117/12.2293117
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KEYWORDS
Image quality
Monte Carlo methods
Convolution
Data modeling
X-ray computed tomography
Reconstruction algorithms
Scattering compensation
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