Author

Zhan-Li Hu

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Preprint Oct 2026

Longitudinal fMRI reveals multi-network reconfiguration and a recurrent frontoparietal shift across rest and task states during adult aging

Functional connectivity changes across adult aging, but most evidence is cross-sectional, and covariance-based connectivity depends on blood oxygenation level dependent (BOLD) fluctuation amplitude. Covariance decline can reflect changing fluctuation amplitude, and its interpretation may depend on whether normalization...

Ting-Shan Liu, Wan-Xin Dong, Hai-Rong Zheng et al. · 0 citations

Aug 2026

Count-aware diffusion with autoregressive inference for low-count PET reconstruction enhancement.

Low-count positron emission tomography (PET) reduces injected activity or acquisition time, but fewer detected coincidence events compromise image quality and quantitative reliability. Existing diffusion-based PET enhancement methods commonly use generic, count-agnostic Gaussian schedules that do not explicitly represe...

Yunlong Gao, Xingyu Xie, Hong-mei Tang et al. · Medical Image Analysis · 0 citations