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MIL-PF:マンモグラフィ分類のための事前計算特徴に基づく多重インスタンス学習

arXiv cs.CV / 2026/3/11

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要点

  • MIL-PFは、医療画像の大きな画像サイズと限定されたアノテーションの課題に対応した、事前計算特徴に基づく多重インスタンス学習を用いたスケーラブルなマンモグラフィ分類の新しいフレームワークです。
  • この手法は、特徴抽出に凍結された基盤モデルを活用し、小さく軽量なMIL集約ヘッドのみを訓練するため、計算コストを大幅に削減し効率的な適応を可能にします。
  • MIL-PFは注意に基づく集約を用いて、全体の組織コンテキストとまばらな局所病変信号の両方をモデル化し、臨床規模で最先端の分類性能を実現します。
  • このフレームワークは、大きなバックボーンモデルを再訓練せずに迅速な実験を促進し、完全なコードの公開により再現性にも寄与します。
  • MIL-PFは、大容量の基盤モデルと弱い教師あり・限定的なアノテーションデータを持つ医療画像タスクを橋渡しする実用的なイノベーションを示しています。

Computer Science > Computer Vision and Pattern Recognition

arXiv:2603.09374 (cs)
[Submitted on 10 Mar 2026]

Title:MIL-PF: Multiple Instance Learning on Precomputed Features for Mammography Classification

View a PDF of the paper titled MIL-PF: Multiple Instance Learning on Precomputed Features for Mammography Classification, by Nikola Jovi\v{s}i\'c and 3 other authors
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Abstract:Modern foundation models provide highly expressive visual representations, yet adapting them to high-resolution medical imaging remains challenging due to limited annotations and weak supervision. Mammography, in particular, is characterized by large images, variable multi-view studies and predominantly breast-level labels, making end-to-end fine-tuning computationally expensive and often impractical. We propose Multiple Instance Learning on Precomputed Features (MIL-PF), a scalable framework that combines frozen foundation encoders with a lightweight MIL head for mammography classification. By precomputing the semantic representations and training only a small task-specific aggregation module (40k parameters), the method enables efficient experimentation and adaptation without retraining large backbones. The architecture explicitly models the global tissue context and the sparse local lesion signals through attention-based aggregation. MIL-PF achieves state-of-the-art classification performance at clinical scale while substantially reducing training complexity. We release the code for full reproducibility.
Comments:
Subjects: Computer Vision and Pattern Recognition (cs.CV); Artificial Intelligence (cs.AI)
Cite as: arXiv:2603.09374 [cs.CV]
  (or arXiv:2603.09374v1 [cs.CV] for this version)
  https://doi.org/10.48550/arXiv.2603.09374
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arXiv-issued DOI via DataCite

Submission history

From: Nikola Jovišić [view email]
[v1] Tue, 10 Mar 2026 08:49:33 UTC (16,451 KB)
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