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Region Attention Transformer for Medical Image Restoration by Yang, Zhiwen; Chen, Haowei; Qian, Ziniu; Zhou, Yang; Zhang, Hui; Zhao, Dan; Wei, Bingzheng; Xu, Yan is a scholarly article available to read on EtoBox.

What is Region Attention Transformer for Medical Image Restoration about?

Transformer-based methods have demonstrated impressive results in medical image restoration, attributed to the multi-head self-attention (MSA) mechanism in the spatial dimension. However, the majority of existing Transformers conduct attention within fixed and coarsely partitioned regions (\text{e.g.} the entire image or fixed patches), resulting in interference from irrelevant regions and fragmentation of continuous image content. To overcome these challenges, we introduce a novel Region Attention Transformer (RAT) that utilizes a region-based multi-head self-attention mechanism (R-MSA). The R-MSA dynamically partitions the input image into non-overlapping semantic regions using the robust Segment Anything Model (SAM) and then performs self-attention within these regions. This region partitioning is more flexible and interpretable, ensuring that only pixels from similar semantic regions complement each other, thereby eliminating interference from irrelevant regions. Moreover, we introduce a focal region loss to guide our model to adaptively focus on recovering high-difficulty regions. Extensive experiments demonstrate the effectiveness of RAT in various medical image restoration t

Author

Yang, Zhiwen; Chen, Haowei; Qian, Ziniu; Zhou, Yang; Zhang, Hui; Zhao, Dan; Wei, Bingzheng; Xu, Yan

Published

2024

Language

EN