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Zhang, Ying; Nie, Rencan; Cao, Jinde; Ma, Chaozhen
IEEE computational intelligence magazine, 2023-Feb., 2023-2-00, Volume: 18, Issue: 1Magazine Article
This paper proposes a self-supervised framework based on a contrastive auto-encoding and convolutional information exchange for multi-modal medical fusion tasks. It is well known that multi-modal medical images have the same and unique features, and information redundancy is easily led when source image features are extracted in pairs. Inspired by contrastive learning, this article constructs positive and negative results pairs and proposes a novel contrastive loss in an auto-encoder. The paired source images are considered as positive and negative results used to reconstruct the source images to avoid the information redundancy problem. This article proposes preserving both the global and local features based on prior knowledge by combining transformer and convolution neural networks in parallel as an auto-encoder. A contribution estimation model is adopted to fuse multi-modal medical images. In the contribution estimation stage, an information exchange block is designed to exchange the feature maps of source images in multi-kernel convolutions, and then the multi-convolutional features are utilized to estimate the best fusion contribution of the paired source images. Experiments demonstrate that our method gives the best results than other state-of-the-art fusion approaches.
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