ArticleSensors (Basel, Switzerland)2025
Few-Shot and Zero-Shot Learning for MRI Brain Tumor Classification Using CLIP and Vision Transformers.
Article in Sensors (Basel, Switzerland), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Accurate classification of brain tumors from MRI scans remains challenging due to limited annotated data. This study compares data-efficient paradigms-few-shot learning (FSL) and zero-shot learning (ZSL)-for tumor diagnosis using deep learning and vision-language models. A Prototypical Network (ProtoNet) with CNN, ResNet-18, and vision transformer backbones was evaluated under 1000 randomly sampled five-shot, four-way episodes (mean ± SD). The ResNet-18 ProtoNet achieved 85% ± 8% accuracy (F1 = 0.85), surpassing a fine-tuned ResNet-50 baseline (42% ± 12%) and the CLIP (ZSL) model (30% ± 10%). A visual-only ZSL baseline without text guidance achieved 54% ± 11%. These results highlight that metric-based FSL offers 43% absolute improvement over standard fine-tuning and establishes a robust benchmark for data-efficient MRI classification under severe label constraints.
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