Normal and Atypical Mitosis Image Classifier using Efficient Vision Transformer

• URL: http://arxiv.org/abs/2509.02589v1
• Date: Thu, 28 Aug 2025 23:45:06 GMT
• Title: Normal and Atypical Mitosis Image Classifier using Efficient Vision Transformer
• Authors: Xuan Qi, Dominic Labella, Thomas Sanford, Maxwell Lee,
• Abstract summary: We tackle atypical versus normal mitosis classification in the MIDOG 2025 challenge using EfficientViT-L2.<n>A unified dataset of 13,938 nuclei from seven cancer types was used, with atypical mitoses comprising 15.<n>This model achieved balanced accuracy of 0.859, ROC AUC of 0.942, and raw accuracy of 0.85, demonstrating competitive and well-balanced performance across metrics.
• Score: 0.5536078880492113
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We tackle atypical versus normal mitosis classification in the MIDOG 2025 challenge using EfficientViT-L2, a hybrid CNN--ViT architecture optimized for accuracy and efficiency. A unified dataset of 13,938 nuclei from seven cancer types (MIDOG++ and AMi-Br) was used, with atypical mitoses comprising ~15. To assess domain generalization, we applied leave-one-cancer-type-out cross-validation with 5-fold ensembles, using stain-deconvolution for image augmentation. For challenge submissions, we trained an ensemble with the same 5-fold split but on all cancer types. In the preliminary evaluation phase, this model achieved balanced accuracy of 0.859, ROC AUC of 0.942, and raw accuracy of 0.85, demonstrating competitive and well-balanced performance across metrics.

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