Abstract
Coronavirus disease 2019 (COVID-19) is an ongoing global pandemic that has threatened health worldwide for years, necessitating accurate and rapid diagnostic techniques given its high pathogenicity and transmissibility. Numerous deep learning models have been developed to assist radiologists in chest computed tomography (CT)-based COVID-19 diagnosis. However, existing COVID-19 CT datasets is often characterized by significant geographic and class imbalances, which impede the model’s ability to generalize effectively across varying patient cohorts. With the advancements in generative adversarial networks (GAN), one potential solution to the problem is to synthesize data for the target datasets by leveraging a large-scale source dataset for pre-training (i.e., few-shot GAN adaptation). To calibrate the target GAN during adaptation, we incorporate contrastive learning coupled with LeCam regularization, ensuring that the diversity inherent in the source dataset is preserved. Additionally, overfitting is mitigated through the use of consistency regularization and differentiable augmentation techniques. Also, we incorporate off-the-shelf vision models into the discriminator ensemble, predicated on the linear separability between real and fake samples in the feature space, thereby encouraging the generator to match the real distribution in different, complementary feature spaces. We demonstrate the effectiveness of our approach in improving COVID-19 diagnostic performance by generating realistic and diverse CT image-label pairs for the target datasets and show that it consistently outperforms the state-of-the-art approaches.
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Acknowledgements
This work was supported partly by Science and Technology Plan Project of Guizhou Province (Qiankehe Support [2020] No. 4Y179), National Natural Science Foundation of China (No. 82260341), Medical Science and Technology Research Fund Project of Guangdong Province (B2022144), Science and Technology Plan Fund of Guizhou Provincial (Qiankehe Foundation-ZK [2022] General 634), and Shenzhen University-Lingnan University Joint Research Programme (SZU-LU006/2122).
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Zhang, J., Xie, Y., Sun, D. et al. Multi-national CT image-label pairs synthesis for COVID-19 diagnosis via few-shot generative adversarial networks adaptation. Neural Comput & Applic 36, 5007–5019 (2024). https://doi.org/10.1007/s00521-023-09317-y
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DOI: https://doi.org/10.1007/s00521-023-09317-y