用生成模型提升脑功能影像分辨率,看清更细微的神经网络结构。
NeuroGAN-3D: Enhancing Intrinsic Functional Brain Networks via High-Fidelity 3D Generative Super-Resolution

- 基于3D生成对抗网络,从低分辨率功能脑图重建高分辨率图像。
- 在真实数据上显著优于传统方法,恢复出更精细的脑区连接模式。
- 适合神经科学研究者、脑疾病诊断与高分辨影像分析人群。
神经影像学的发展加深了我们对大脑复杂功能与结构组织的理解。其中,功能磁共振成像(fMRI),尤其是静息态fMRI(rs-fMRI),已成为识别内在脑连接生物标志物和描绘大规模神经网络的重要工具。这些网络通常以体积分割的空间图谱形式呈现,反映功能一致的脑区及个体间脑活动与结构的差异。空间分辨率在此类图谱中至关重要,它决定了定位功能单元的精度、可靠进行脑区分割,以及检测与发育、衰老或疾病相关的细微空间特异性神经生物学改变。因此,提升神经影像衍生图谱的有效分辨率,有望实现对脑架构及其与行为和病理关系的更深入洞察。为应对这一需求,我们提出NeuroGAN-3D——一种专为体积分割神经影像计算需求设计的新型3D生成超分辨率模型。该模型利用生成对抗网络架构,显著提升了rs-fMRI空间图谱的分辨率,性能明显优于传统基线方法。
原文摘要 · Abstract (English)
Recent advances in neuroimaging have deepened our understanding of the brain's complex functional and structural organization. Among these, functional Magnetic Resonance Imaging (fMRI) - particularly resting-state fMRI (rs-fMRI) - has emerged as a tool for identifying biomarkers of intrinsic brain connectivity and delineating large-scale neural networks. These networks are typically represented as volumetric spatial maps that capture functionally coherent brain regions and reflect individual differences in brain activity and structure. The spatial resolution of these maps plays an important role, as it determines the ability to localize functional units with precision, perform reliable brain parcellation, and detect subtle, spatially specific neurobiological alterations associated with development, aging, or disease. Therefore, improving the effective resolution of neuroimaging-derived maps holds significant promise for enabling more detailed insights into brain architecture and its relationship to behavior and pathology. To address this need, we propose NeuroGAN-3D, a novel 3D generative super-resolution model tailored to the computational demands of volumetric neuroimaging. Our model leverages a generative adversarial network architecture to enhance the spatial resolution of rs-fMRI spatial maps, significantly outperforming a conventional baseline.
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