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- W4387211256 abstract "Sparse-view computed tomography (CT) is a promising solution for expediting the scanning process and mitigating radiation exposure to patients, the reconstructed images, however, contain severe streak artifacts, compromising subsequent screening and diagnosis. Recently, deep learning-based image post-processing methods along with their dual-domain counterparts have shown promising results. However, existing methods usually produce over-smoothed images with loss of details due to i) the difficulty in accurately modeling the artifact patterns in the image domain, and ii) the equal treatment of each pixel in the loss function. To address these issues, we concentrate on the image post-processing and propose a simple yet effective FREquency-band-awarE and SElf-guidED network, termed FreeSeed, which can effectively remove artifacts and recover missing details from the contaminated sparse-view CT images. Specifically, we first propose a frequency-band-aware artifact modeling network (FreeNet), which learns artifact-related frequency-band attention in the Fourier domain for better modeling the globally distributed streak artifact on the sparse-view CT images. We then introduce a self-guided artifact refinement network (SeedNet), which leverages the predicted artifact to assist FreeNet in continuing to refine the severely corrupted details. Extensive experiments demonstrate the superior performance of FreeSeed and its dual-domain counterpart over the state-of-the-art sparse-view CT reconstruction methods. Source code is made available at https://github.com/Masaaki-75/freeseed ." @default.
- W4387211256 created "2023-10-01" @default.
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- W4387211256 date "2023-01-01" @default.
- W4387211256 modified "2023-10-01" @default.
- W4387211256 title "FreeSeed: Frequency-Band-Aware and Self-guided Network for Sparse-View CT Reconstruction" @default.
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- W4387211256 doi "https://doi.org/10.1007/978-3-031-43999-5_24" @default.
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