Dynamic optimization of the signal-to-noise ratio of dual-energy attenuation data for reconstructing images
A technology of attenuation data and dynamic optimization, applied in the field of dual-energy X-ray imaging, which can solve problems such as count rate drop
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[0071] The illustrations in the figures are illustrative. It should be noted that in different figures, similar or identical elements are denoted by the same reference symbols, or by corresponding reference symbols which differ only in the first numeral.
[0072] In the following, some theoretical background information on the effect of photon statistics on the signal-to-noise ratio in dual-energy imaging is first given.
[0073] Dual energy x-ray imaging introduces another additional processing step to the image processing steps of conventional x-ray or computed tomography (CT) systems. This processing step is based on the important insight that within the energy range of the diagnostic target (i.e. between approximately 10 keV and 150 keV), the energy dependence of the material's mass attenuation coefficient μ(E) can be attenuated by only two Basis function μ 1 (E) and μ 2 (E) to a good approximation. From a physical point of view, this can be understood as the sum of th...
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