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SA-Med2D-20M Dataset: Segment Anything in 2D Medical Imaging with 20 Million masks

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arxiv 2311.11969 v1 pith:GUZH6BLK submitted 2023-11-20 eess.IV cs.CV

classification eess.IVcs.CV
keywords medicalsa-med2d-20mdatasetdatasetsimageimagesknowledgemillion
verification ladder T0 review T1 audit T2 compute T3 formal
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Segment Anything Model (SAM) has achieved impressive results for natural image segmentation with input prompts such as points and bounding boxes. Its success largely owes to massive labeled training data. However, directly applying SAM to medical image segmentation cannot perform well because SAM lacks medical knowledge -- it does not use medical images for training. To incorporate medical knowledge into SAM, we introduce SA-Med2D-20M, a large-scale segmentation dataset of 2D medical images built upon numerous public and private datasets. It consists of 4.6 million 2D medical images and 19.7 million corresponding masks, covering almost the whole body and showing significant diversity. This paper describes all the datasets collected in SA-Med2D-20M and details how to process these datasets. Furthermore, comprehensive statistics of SA-Med2D-20M are presented to facilitate the better use of our dataset, which can help the researchers build medical vision foundation models or apply their models to downstream medical applications. We hope that the large scale and diversity of SA-Med2D-20M can be leveraged to develop medical artificial intelligence for enhancing diagnosis, medical image analysis, knowledge sharing, and education. The data with the redistribution license is publicly available at https://github.com/OpenGVLab/SAM-Med2D.

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Cited by 8 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. DrVD-Bench: Do Vision-Language Models Reason Like Human Doctors in Medical Image Diagnosis?

    cs.CV 2025-05 conditional novelty 7.0 of 10

    A new five-level medical imaging benchmark, DrVD-Bench, shows that vision-language models lose accuracy sharply as reasoning complexity grows and often diagnose without grounding in lesion evidence.

  2. Beyond Medical Diagnostics: How Medical Multimodal Large Language Models Think in Space

    cs.CV 2026-03 conditional novelty 6.0 of 10

    SpatialMed provides the first CT-based benchmark of 3D spatial reasoning for medical MLLMs, on which 14 models perform near chance, particularly for distance and volume estimation.

  3. SafeClick: Error-Tolerant Interactive Segmentation of Any Medical Volumes via Hierarchical Expert Consensus

    eess.IV 2025-06 conditional novelty 6.0 of 10

    SafeClick adds a hierarchical expert consensus module to SAM 2 and MedSAM 2 that improves segmentation accuracy under imperfect prompts.

  4. Location-Aware Fine-Grained Representation Learning for Medical Vision Foundation Models

    cs.CV 2026-08 conditional novelty 5.0 of 10

    LoFi, trained on 4.48M medical image-text-box triplets with grounding and grounded captioning, outperforms prior models on phrase grounding, VQA, and robustness.

  5. Dual-Adaptive SAM3: Hierarchical Routing over Low-Rank Expert Layers for Parameter-Efficient Medical Image Segmentation

    cs.CV 2026-06 conditional novelty 5.0 of 10

    Hierarchical multimodal MoE with low-rank expert deltas adapts frozen SAM3 for medical segmentation, reporting ~5-point Dice gains over SAM3 and lower MoE overhead.

  6. MediRound: Multi-Round Entity-Level Reasoning Segmentation in Medical Images

    cs.CV 2025-11 conditional novelty 5.0 of 10

    MediRound introduces a multi-round, entity-level medical segmentation task, a 177K-dialogue dataset built from SA-Med2D-20M with GPT-5, and a LLaVA-Med/MedSAM baseline whose inference-time judgment-and-correction modu...

  7. ClinKD: Cross-Modal Clinical Knowledge Distiller For Multi-Task Medical Images

    cs.CV 2025-02 conditional novelty 4.0 of 10

    ClinKD combines a modified rotary position embedding, confidence-weighted pseudo-label distillation, and CLIP-based answer selection, reporting state-of-the-art scores on Med-GRIT and LLaVA-Med-QA benchmarks.

  8. Spatial navigation in preclinical Alzheimer's disease: A review

    q-bio.NC 2026-03 unverdicted novelty 3.0 of 10

    Spatial navigation performance, particularly path integration and wayfinding, correlates with AD biomarkers such as p-tau in cognitively unimpaired at-risk individuals and may enable earlier detection than episodic me...

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