U-shaped convolutional transformer GAN with multi-resolution consistency loss for restoring brain functional time-series and dementia diagnosis

IF 2.1 4区 医学 Q2 MATHEMATICAL & COMPUTATIONAL BIOLOGY Frontiers in Computational Neuroscience Pub Date : 2024-04-17 DOI:10.3389/fncom.2024.1387004
Qiankun Zuo, Ruiheng Li, Binghua Shi, Jin Hong, Yanfei Zhu, Xuhang Chen, Yixian Wu, Jia Guo
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Abstract

IntroductionThe blood oxygen level-dependent (BOLD) signal derived from functional neuroimaging is commonly used in brain network analysis and dementia diagnosis. Missing the BOLD signal may lead to bad performance and misinterpretation of findings when analyzing neurological disease. Few studies have focused on the restoration of brain functional time-series data.MethodsIn this paper, a novel U-shaped convolutional transformer GAN (UCT-GAN) model is proposed to restore the missing brain functional time-series data. The proposed model leverages the power of generative adversarial networks (GANs) while incorporating a U-shaped architecture to effectively capture hierarchical features in the restoration process. Besides, the multi-level temporal-correlated attention and the convolutional sampling in the transformer-based generator are devised to capture the global and local temporal features for the missing time series and associate their long-range relationship with the other brain regions. Furthermore, by introducing multi-resolution consistency loss, the proposed model can promote the learning of diverse temporal patterns and maintain consistency across different temporal resolutions, thus effectively restoring complex brain functional dynamics.ResultsWe theoretically tested our model on the public Alzheimer's Disease Neuroimaging Initiative (ADNI) dataset, and our experiments demonstrate that the proposed model outperforms existing methods in terms of both quantitative metrics and qualitative assessments. The model's ability to preserve the underlying topological structure of the brain functional networks during restoration is a particularly notable achievement.ConclusionOverall, the proposed model offers a promising solution for restoring brain functional time-series and contributes to the advancement of neuroscience research by providing enhanced tools for disease analysis and interpretation.
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具有多分辨率一致性损失的 U 型卷积变换器 GAN 用于还原大脑功能时间序列和痴呆症诊断
导言从功能神经成像中获得的血氧水平依赖性(BOLD)信号常用于脑网络分析和痴呆诊断。在分析神经系统疾病时,BOLD 信号的缺失可能会导致不良表现和结果误读。本文提出了一种新型 U 形卷积变换器 GAN(UCT-GAN)模型,用于恢复缺失的脑功能时间序列数据。该模型充分利用了生成式对抗网络(GAN)的强大功能,同时结合了 U 型结构,从而在还原过程中有效捕捉分层特征。此外,基于变压器的生成器中还设计了多级时间相关注意和卷积采样,以捕捉缺失时间序列的全局和局部时间特征,并将其与其他脑区的长程关系联系起来。此外,通过引入多分辨率一致性损失,所提出的模型可以促进对不同时间模式的学习,并在不同时间分辨率之间保持一致性,从而有效地恢复复杂的大脑功能动态。结果我们在公开的阿尔茨海默病神经影像倡议(ADNI)数据集上对我们的模型进行了理论测试,实验证明所提出的模型在定量指标和定性评估方面都优于现有方法。总之,所提出的模型为恢复大脑功能时间序列提供了一种很有前景的解决方案,并通过为疾病分析和解释提供增强工具,为神经科学研究的进步做出了贡献。
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来源期刊
Frontiers in Computational Neuroscience
Frontiers in Computational Neuroscience MATHEMATICAL & COMPUTATIONAL BIOLOGY-NEUROSCIENCES
CiteScore
5.30
自引率
3.10%
发文量
166
审稿时长
6-12 weeks
期刊介绍: Frontiers in Computational Neuroscience is a first-tier electronic journal devoted to promoting theoretical modeling of brain function and fostering interdisciplinary interactions between theoretical and experimental neuroscience. Progress in understanding the amazing capabilities of the brain is still limited, and we believe that it will only come with deep theoretical thinking and mutually stimulating cooperation between different disciplines and approaches. We therefore invite original contributions on a wide range of topics that present the fruits of such cooperation, or provide stimuli for future alliances. We aim to provide an interactive forum for cutting-edge theoretical studies of the nervous system, and for promulgating the best theoretical research to the broader neuroscience community. Models of all styles and at all levels are welcome, from biophysically motivated realistic simulations of neurons and synapses to high-level abstract models of inference and decision making. While the journal is primarily focused on theoretically based and driven research, we welcome experimental studies that validate and test theoretical conclusions. Also: comp neuro
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