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• W4308679206 abstract "Abstract Objective. Deep neural network (DNN) based methods have shown promising performances for low-dose computed tomography (LDCT) imaging. However, most of the DNN-based methods are trained on simulated labeled datasets, and the low-dose simulation algorithms are usually designed based on simple statistical models which deviate from the real clinical scenarios, which could lead to issues of overfitting, instability and poor robustness. To address these issues, in this work, we present a structure-preserved meta-learning uniting network (shorten as ‘SMU-Net’) to suppress noise-induced artifacts and preserve structure details in the unlabeled LDCT imaging task in real scenarios. Approach. Specifically, the presented SMU-Net contains two networks, i.e., teacher network and student network. The teacher network is trained on simulated labeled dataset and then helps the student network train with the unlabeled LDCT images via the meta-learning strategy. The student network is trained on real LDCT dataset with the pseudo-labels generated by the teacher network. Moreover, the student network adopts the Co-teaching strategy to improve the robustness of the presented SMU-Net. Main results. We validate the proposed SMU-Net method on three public datasets and one real low-dose dataset. The visual image results indicate that the proposed SMU-Net has superior performance on reducing noise-induced artifacts and preserving structure details. And the quantitative results exhibit that the presented SMU-Net method generally obtains the highest signal-to-noise ratio (PSNR), the highest structural similarity index measurement (SSIM), and the lowest root-mean-square error (RMSE) values or the lowest natural image quality evaluator (NIQE) scores. Significance. We propose a meta learning strategy to obtain high-quality CT images in the LDCT imaging task, which is designed to take advantage of unlabeled CT images to promote the reconstruction performance in the LDCT environments." @default.
• W4308679206 created "2022-11-14" @default.
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• W4308679206 date "2022-12-12" @default.
• W4308679206 modified "2023-09-27" @default.
• W4308679206 title "Structure-preserved meta-learning uniting network for improving low-dose CT quality" @default.
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• W4308679206 doi "https://doi.org/10.1088/1361-6560/aca194" @default.
• W4308679206 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36351294" @default.
• W4308679206 hasPublicationYear "2022" @default.
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