Learning Deformable Image Registration from Optimization: Perspective, Modules, Bilevel Training and Beyond

• URL: http://arxiv.org/abs/2004.14557v4
• Date: Thu, 30 Sep 2021 01:12:11 GMT
• Title: Learning Deformable Image Registration from Optimization: Perspective, Modules, Bilevel Training and Beyond
• Authors: Risheng Liu, Zi Li, Xin Fan, Chenying Zhao, Hao Huang and Zhongxuan Luo
• Abstract summary: We develop a new deep learning based framework to optimize a diffeomorphic model via multi-scale propagation. We conduct two groups of image registration experiments on 3D volume datasets including image-to-atlas registration on brain MRI data and image-to-image registration on liver CT data.
• Score: 62.730497582218284
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Conventional deformable registration methods aim at solving an optimization model carefully designed on image pairs and their computational costs are exceptionally high. In contrast, recent deep learning based approaches can provide fast deformation estimation. These heuristic network architectures are fully data-driven and thus lack explicit geometric constraints, e.g., topology-preserving, which are indispensable to generate plausible deformations. We design a new deep learning based framework to optimize a diffeomorphic model via multi-scale propagation in order to integrate advantages and avoid limitations of these two categories of approaches. Specifically, we introduce a generic optimization model to formulate diffeomorphic registration and develop a series of learnable architectures to obtain propagative updating in the coarse-to-fine feature space. Moreover, we propose a novel bilevel self-tuned training strategy, allowing efficient search of task-specific hyper-parameters. This training strategy increases the flexibility to various types of data while reduces computational and human burdens. We conduct two groups of image registration experiments on 3D volume datasets including image-to-atlas registration on brain MRI data and image-to-image registration on liver CT data. Extensive results demonstrate the state-of-the-art performance of the proposed method with diffeomorphic guarantee and extreme efficiency. We also apply our framework to challenging multi-modal image registration, and investigate how our registration to support the down-streaming tasks for medical image analysis including multi-modal fusion and image segmentation.

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