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arXiv 2410.04097eess.IVcs.CV
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基于TV的fMRI深度三维自超分辨率

TV-based Deep 3D Self Super-Resolution for fMRI

Basque Center on Cognition, Brain, and Language (BCBL)(巴斯克认知、大脑与语言中心(BCBL));Athinoula A. Martinos Center for Biomedical Imaging, Harvard Medical School(哈佛医学院 Athinoula A. Martinos 生物医学成像中心);Ikerbasque, Basque Foundation for Science(伊克尔巴斯克基金会(巴斯克科学基金会));CSAIL, Massachusetts Institute of Technology (MIT)(麻省理工学院计算机科学与人工智能实验室(CSAIL))

Fernando Pérez-Bueno, Hongwei Bran Li, Matthew S. Rosen, Shahin Nasr, Cesar Caballero-Gaudes, Juan Eugenio Iglesias

AI总结:

本文提出一种结合深度学习网络、分析方法和总变差正则化的自监督fMRI超分辨率模型,无需外部真实高分辨率图像即可实现与监督方法相当的性能并保留功能图。

摘要:

虽然功能磁共振成像(fMRI)为认知过程提供了有价值的见解,但其固有的空间局限性对大脑精细功能架构的详细分析构成了挑战。更具体地说,MRI扫描仪和序列规格在时间分辨率、空间分辨率、信噪比和扫描时间之间施加了权衡。深度学习(DL)超分辨率(SR)方法已成为提高fMRI分辨率的 promising 解决方案,从通常以较低扫描时间获取的低分辨率(LR)图像生成高分辨率(HR)图像。然而,大多数现有的SR方法依赖于监督式DL技术,这些技术需要训练真实(GT)HR数据,而这类数据往往难以获取,同时这也限制了SR可以达到的程度。在本文中,我们介绍了一种新颖的自监督DL SR模型,该模型将DL网络与分析方法及总变差(TV)正则化相结合。我们的方法消除了对外部GT图像的需求,实现了与监督式DL技术相当的性能,并保留了功能图。

英文摘要:

While functional Magnetic Resonance Imaging (fMRI) offers valuable insights into cognitive processes, its inherent spatial limitations pose challenges for detailed analysis of the fine-grained functional architecture of the brain. More specifically, MRI scanner and sequence specifications impose a trade-off between temporal resolution, spatial resolution, signal-to-noise ratio, and scan time. Deep Learning (DL) Super-Resolution (SR) methods have emerged as a promising solution to enhance fMRI resolution, generating high-resolution (HR) images from low-resolution (LR) images typically acquired with lower scanning times. However, most existing SR approaches depend on supervised DL techniques, which require training ground truth (GT) HR data, which is often difficult to acquire and simultaneously sets a bound for how far SR can go. In this paper, we introduce a novel self-supervised DL SR model that combines a DL network with an analytical approach and Total Variation (TV) regularization. Our method eliminates the need for external GT images, achieving competitive performance compared to supervised DL techniques and preserving the functional maps.

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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