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• W3080879059 abstract "In computed tomography, high attenuation occurs when x-rays pass through a dense region or a long path in the scanning object. In this case, only limited photons reach the detector, which causes photon starvation artifacts. The artifacts usually appear as streaks along the directions with high attenuation. It might lower the discrimination of minor structures and lead to misdiagnosis. Applying a local filter to the projection data adaptively is a common solution, however, if the parameters of projection-based filter are not well selected, new artifacts and noise might appear in the final image. In this paper, a post image processing technique was developed to suppress the photon starvation streak artifacts. Based on the directional characteristics of streaks, a semi-adaptive anisotropic diffusion filter was applied to the high frequency sub-bands after wavelet transformation (WASA). Qualitative and quantitative experiments were performed on phantom data and clinical data to prove the effectiveness of this method for photon starvation artifact suppression." @default.
• W3080879059 created "2020-09-01" @default.
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• W3080879059 date "2020-12-02" @default.
• W3080879059 modified "2023-10-02" @default.
• W3080879059 title "A wavelet transform-based photon starvation artifacts suppression algorithm in CT imaging" @default.
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• W3080879059 doi "https://doi.org/10.1088/1361-6560/abb171" @default.
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