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arXiv 2008.08248eess.IVcs.CVcs.LG
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基于神经结构搜索的增强型MRI重构网络

Enhanced MRI Reconstruction Network using Neural Architecture Search

Rutgers University(罗格斯大学);NVIDIA(英伟达)

Qiaoying Huang, Dong Yang, Yikun Xian, Pengxiang Wu, Jingru Yi, Hui Qu, Dimitris Metaxas

摘要:

使用现代深度学习技术精确重建欠采样的磁共振成像(MRI)数据,需要花费大量精力来设计必要的复杂神经网络架构。级联网络结构在MRI图像重建中得到了广泛的应用,但当网络变深时,存在梯度消失的问题。此外,同构结构降低了网络的表示能力。在这项工作中,我们提出了一个增强的MRI重建网络使用的残差基本块。对于基本块中的每个单元,我们使用可微神经结构搜索(NAS)技术来自动选择密集块的八个变体中的最佳操作。这种新的异构网络在两个公开的数据集上进行了评估,并优于所有当前最先进的方法,这证明了我们所提出的方法的有效性。

英文摘要:

The accurate reconstruction of under-sampled magnetic resonance imaging (MRI) data using modern deep learning technology, requires significant effort to design the necessary complex neural network architectures. The cascaded network architecture for MRI reconstruction has been widely used, while it suffers from the "vanishing gradient" problem when the network becomes deep. In addition, homogeneous architecture degrades the representation capacity of the network. In this work, we present an enhanced MRI reconstruction network using a residual in residual basic block. For each cell in the basic block, we use the differentiable neural architecture search (NAS) technique to automatically choose the optimal operation among eight variants of the dense block. This new heterogeneous network is evaluated on two publicly available datasets and outperforms all current state-of-the-art methods, which demonstrates the effectiveness of our proposed method.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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