Frozen features from brain MRI foundation models lose accuracy on new datasets, a problem often attributed to dataset encoding. The study shows that the failure stems from the content itself being encoded along different directions in each dataset, rather than from dataset encoding or distribution shifts. Only broadly pretrained models like 3DINO and SAM‑Med3D consistently encode the MRI sequence well enough to transfer, while brain‑specific models such as BrainIAC and BrainFM perform no better than an untrained network.
arXiv:2608.29944v1 Announce Type: new Abstract: Brain tumor segmentation in magnetic resonance imaging (MRI) is a critical task for diagnosis and treatment planning. Despite the success of deep learn...
arXiv:2608. 06613v1 Announce Type: cross Abstract: Self-supervised 3D medical foundation models are increasingly used as general-purpose feature extractors, yet their sensitivity to MRI artifacts remains poorly understood.
arXiv:2610.28411v1 Announce Type: cross Abstract: Deep learning models have become essential tools in medical imaging, yet training them end-to-end for diverse tasks remains challenging due to limite...
arXiv:2606. 04772v1 Announce Type: cross Abstract: Understanding the relationship between deep visual representations and the human visual system is a fundamental challenge in computational neuroscience.
arXiv:2608. 10295v1 Announce Type: cross Abstract: Frozen foundation-model (FM) embeddings are increasingly used as off-the-shelf brain-MRI representations, on the assumption that they capture anatomy.
arXiv:2606.13315v2 Announce Type: replace Abstract: MRI self-supervised learning (SSL) has largely emphasized segmentation and dense prediction, while controlled studies of how alternative pretrainin...
arXiv:2604. 27277v3 Announce Type: replace-cross Abstract: Brain MRI underpins a wide range of neuroscientific and clinical applications, yet most learning-based methods remain task-specific and require substantial labeled data.
arXiv:2605.24625v2 Announce Type: replace Abstract: Ultra-low-field (ULF) MRI offers portable and accessible neuroimaging but suffers from reduced signal-to-noise ratio and limited spatial resolution...
arXiv:2607. 17782v1 Announce Type: cross Abstract: Foundation models pretrained using self-supervised learning have transformed computer vision by learning transferable representations from large-scale unlabeled data.
arXiv:2609.23983v1 Announce Type: new Abstract: Neuroimaging foundation models pretrained on large, predominantly western cohorts are increasingly proposed as general-purpose backbones for brain MRI...
arXiv:2606. 15457v1 Announce Type: cross Abstract: 3D FLAIR MRI is widely recommended as one of the standard MRI sequences for brain imaging in multiple sclerosis (MS), but publicly available MS datasets remain relatively small and vary across scanners, acquisition protocols, and lesion patterns.
ViBMR is the first large‑scale multi‑sequence brain MRI dataset paired with routine Vietnamese clinical reports, containing 3,649 patients and 11,875 MRI series across T1, T2, FLAIR, and contrast‑enhanced T1 sequences. The authors establish a comprehensive evaluation framework for brain MRI report generation, testing various medical vision‑language models, multi‑sequence inputs, and feature aggregation strategies. Results highlight dataset characteristics, model behavior, and the importance of native low‑resource clinical datasets for reliable Vietnamese‑origin brain MRI report generation.