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arXiv 2301.01355eess.IVcs.CV
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用于动态同时多切片MRI重建的整体多切片框架

Holistic Multi-Slice Framework for Dynamic Simultaneous Multi-Slice MRI Reconstruction

Yale University(耶鲁大学);United Imaging Intelligence(联影智能)

Daniel H. Pak, Xiao Chen, Eric Z. Chen, Yikang Liu, Terrence Chen, Shanhui Sun

摘要:

动态磁共振成像(dMRI)被广泛用于评估各种心脏状况,如心脏运动和血流。为了加速MR采集,通常使用欠采样和同步多切片(SMS)等技术。需要特殊的重建算法来从纠缠的信息中重建多个SMS图像切片。基于深度学习(DL)的方法在单层MR重建方面显示出了有希望的结果,但由于复合k空间信号和产生的具有强烈层间伪影的图像,SMS加速的增加带来了独特的挑战。此外,许多dMRI应用缺乏足够的数据来训练重建神经网络。在这项研究中,我们提出了一种新的基于DL的框架,用于动态SMS重建。我们的主要贡献是1)数据转换步骤和网络设计的组合,有效地利用了欠采样动态SMS数据的独特特征,以及2)MR物理指导的迁移学习策略,解决了数据稀缺问题。与多个基线方法的彻底比较说明了我们所提出的方法的优势。

英文摘要:

Dynamic Magnetic Resonance Imaging (dMRI) is widely used to assess various cardiac conditions such as cardiac motion and blood flow. To accelerate MR acquisition, techniques such as undersampling and Simultaneous Multi-Slice (SMS) are often used. Special reconstruction algorithms are needed to reconstruct multiple SMS image slices from the entangled information. Deep learning (DL)-based methods have shown promising results for single-slice MR reconstruction, but the addition of SMS acceleration raises unique challenges due to the composite k-space signals and the resulting images with strong inter-slice artifacts. Furthermore, many dMRI applications lack sufficient data for training reconstruction neural networks. In this study, we propose a novel DL-based framework for dynamic SMS reconstruction. Our main contributions are 1) a combination of data transformation steps and network design that effectively leverages the unique characteristics of undersampled dynamic SMS data, and 2) an MR physics-guided transfer learning strategy that addresses the data scarcity issue. Thorough comparisons with multiple baseline methods illustrate the strengths of our proposed methods.

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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