Unsupervised low-dose CT image denoising using CycleGAN with selective spatial pyramid attention

Wanxin Sun; Jinke Zhang; Dejing Hao; Yingying Lin; Yuanke Zhang

doi:10.1117/12.2681105

23 May 2023 Unsupervised low-dose CT image denoising using CycleGAN with selective spatial pyramid attention

Wanxin Sun, Jinke Zhang, Dejing Hao, Yingying Lin, Yuanke Zhang

Proceedings Volume 12645, International Conference on Computer, Artificial Intelligence, and Control Engineering (CAICE 2023); 126451K (2023) https://doi.org/10.1117/12.2681105
Event: International Conference on Computer, Artificial Intelligence, and Control Engineering (CAICE 2023), 2023, Hangzhou, China

Abstract

Low-Dose CT (LDCT) imaging technique can reduce the radiation exposure to patients but would inevitably introduce serious noise and artifacts to the CT images. Deep learning based LDCT denoising methods with supervised learning strategy have shown promising performance. However, they heavily rely on well-aligned training image pairs that are in fact very difficult to be obtained in clinical practice. In this study, we propose a CycleGAN-based unsupervised LDCT image denoising method with a novel Selective Spatial Pyramid Attention block (SSPA). The proposed SSPA can effectively fuse the attention map with the original feature map through an attention scheme, thus better extract the representative features for fine structure restoration. Experimental results show that the proposed unsupervised method achieves state-of-the-art denoising performance for LDCT images.

Citation Download Citation

Wanxin Sun, Jinke Zhang, Dejing Hao, Yingying Lin, and Yuanke Zhang "Unsupervised low-dose CT image denoising using CycleGAN with selective spatial pyramid attention", Proc. SPIE 12645, International Conference on Computer, Artificial Intelligence, and Control Engineering (CAICE 2023), 126451K (23 May 2023); https://doi.org/10.1117/12.2681105

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KEYWORDS

Denoising

Image denoising

Computed tomography

Machine learning

Education and training

Feature extraction

Dysprosium

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