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Co-authored-by: Nguyễn Hùng Thanh <baodom9901@users.noreply.huggingface.co>

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README.md ADDED
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1
+ ---
2
+ language:
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+ - en
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+ license: other # Using 'other' for CC BY-NC-ND (Non-Commercial, No Derivs)
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+ tags:
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+ - medical
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+ - ophthalmology
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+ - fundus-image
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+ - oct-volume
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+ - multi-modal # Key feature: combining 2D fundus and 3D OCT
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+ - image-classification
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+ - image-segmentation
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+ - glaucoma-grading
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+ - optic-disc-segmentation
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+ task_categories:
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+ - image-classification
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+ - image-segmentation
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+ - object-detection # Includes Fovea Localization (coordinates)
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+ task_ids:
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+ - multi-class-image-classification # Glaucoma Grading (Normal/Early/Progressive)
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+ - semantic-segmentation # OD/OC Segmentation
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+ pretty_name: GAMMA (Glaucoma grading from Multi-Modality imAges) Challenge Dataset
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+ size_categories:
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+ - 100<n<1K # 300 paired samples (under 1000)
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+ annotations_creators:
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+ - expert-generated
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+ source_datasets:
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+ - original
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+ source_data_urls:
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+ - https://gamma.grand-challenge.org/
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+ - https://arxiv.org/abs/2202.06511
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+ ---
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+
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+ # GAMMA — Glaucoma grading from Multi-Modality imAges (Challenge dataset)
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+
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+ <table align="center">
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+ <tr>
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+ <td width="100%" align="center">
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+ <img src="rm_images/Merged_Fundus_Images_with_Captions.jpg" alt="Merged Dataset Samples" style="max-width: 100%; height: auto;">
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+ <br>
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+ <p><strong>Image:</strong> Dataset Samples.</p>
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+ </td>
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+ </tr>
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+ </table>
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+
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+ ## Short description
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+ GAMMA is the first **public multi-modality glaucoma grading** dataset that pairs **2D color fundus photographs** with **3D OCT volumes** for each sample. It was released as part of the GAMMA challenge (OMIA8 / MICCAI 2021) to encourage algorithms that combine fundus and OCT information for automatic glaucoma grading.
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+
49
+ ---
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+
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+ ## What the dataset contains
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+ - **Paired modalities:** one macula/optic-disc centered 2D color fundus image **and** one 3D OCT volume (macula-centered) per sample.
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+ - **Samples:** **300 paired samples** (fundus + OCT) corresponding to **276 patients**.
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+ - **Labeling / ground truth:** each sample has a glaucoma grade (normal / early / progressive), derived from visual field mean deviation (MD) criteria; auxiliary labels include **optic disc & cup (OD/OC) segmentation masks** and **fovea coordinates** on the fundus images.
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+ - **Demographics:** 276 Chinese patients, age range 19–77, mean ≈ 40.6 years; female ≈ 42%.
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+ - **Balanced classes:** glaucoma ~50% of samples; within glaucoma: ~52% early, ~29% intermediate, ~19% advanced (intermediate+advanced grouped as “progressive” in challenge tasks).
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+ - **Acquisition devices:** OCT volumes acquired using **Topcon DRI OCT Triton**; fundus images captured by **KOWA** and **Topcon TRC-NW400** cameras (macula or midpoint between disc and macula).
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+ - **OCT spec:** 3×3 mm en-face FOV; each volume contains 256 B-scans (cross-sectional frames).
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+ - **Image quality:** manually checked; dataset split into three challenge sets (training, preliminary, final) with ~100 pairs per set.
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+ - **License / access:** publicly available via the GAMMA grand-challenge page; dataset distributed under **CC BY-NC-ND** (Attribution-NonCommercial-NoDerivs).
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+ - **Official dataset page / access:** https://gamma.grand-challenge.org/
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+
63
+ ---
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+
65
+ ## Intended tasks
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+ Primary:
67
+ - **Glaucoma grading** from paired fundus + OCT (predict: normal / early-glaucoma / progressive-glaucoma).
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+
69
+ Auxiliary:
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+ - **OD/OC segmentation** (optic disc and optic cup masks on fundus images).
71
+ - **Fovea localization** (x,y coordinates).
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+
73
+ Researchers may optionally use the auxiliary tasks to boost the main grading performance.
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+
75
+ ---
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+
77
+ ## Dataset structure (typical)
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+
79
+ ```text
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+ GAMMA/
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+ ├── images/
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+ │ ├── fundus/ # fundus images (JPEG/PNG)
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+ │ │ ├── sample_0001_fundus.jpg
84
+ │ │ └── ...
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+ │ └── oct/ # OCT volumes (folder or volume files per sample)
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+ │ ├── sample_0001_oct/ # 256 B-scans or a volume file (format described in README_original)
87
+ │ └── ...
88
+ ├── labels/
89
+ │ ├── grades.csv # sample_id, grade (normal/early/progressive), MD values, other clinical metadata
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+ │ ├── fovea_coords.csv # sample_id, x, y
91
+ │ └── od_oc_masks/ # per-sample masks (optional; may be in separate archive)
92
+ │ ├── sample_0001_od.png
93
+ │ └── ...
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+ └── README_original.txt
95
+ ```
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+
97
+ ---
98
+
99
+ ## How samples were graded
100
+ Glaucoma grading ground truth was determined using **visual field mean deviation (MD)** thresholds from visual field tests performed the same day as OCT:
101
+ - **Early:** MD > −6 dB
102
+ - **Intermediate:** −12 dB < MD ≤ −6 dB
103
+ - **Advanced:** MD ≤ −12 dB
104
+ For the main challenge, intermediate + advanced were grouped as **progressive-glaucoma**.
105
+
106
+ ---
107
+
108
+ ## Size & splits
109
+ - **Total paired samples:** **300** (fundus + OCT)
110
+ - **Patients:** 276 (some bilateral samples)
111
+ - **Class distribution:** ~50% glaucoma / 50% non-glaucoma; within glaucoma: early ≈ 52%, intermediate ≈ 28.7%, advanced ≈ 19.3%
112
+ - **Challenge splits:** approximately **100 pairs** for training, 100 for preliminary, 100 for final test (samples from each category distributed across splits).
113
+
114
+ ---
115
+
116
+ ## Recommended uses & notes
117
+ - Use paired modalities (fundus + OCT) for multimodal fusion models — combining morphological cues (fundus OD/OC, vCDR) and structural OCT features (RNFL thickness) improves grading.
118
+ - Auxiliary tasks (OD/OC masks, fovea) are provided to support explainability and localized feature extraction.
119
+ - Respect the **CC BY-NC-ND** license for redistribution and commercial restrictions.
120
+
121
+ ---
122
+
123
+ ## Citation / sources
124
+ Please cite the GAMMA challenge paper and dataset when using the data:
125
+
126
+ - Wu J., Fang H., Li F., Fu H., Lin F., et al., **“GAMMA challenge: Glaucoma grAding from Multi-Modality imAges.”** (paper / challenge summary). arXiv:2202.06511; journal: *Medical Image Analysis* (2023). DOI: 10.1016/j.media.2023.102938.
127
+ - Official dataset page (host & download): **https://gamma.grand-challenge.org/**
128
+
129
+ Primary references used to prepare this README:
130
+ - arXiv / GAMMA challenge paper: https://arxiv.org/abs/2202.06511
131
+ - Final journal version / PubMed entry: https://pubmed.ncbi.nlm.nih.gov/37806020/
132
+ - GAMMA challenge (Grand Challenge) dataset page: https://gamma.grand-challenge.org/
133
+
134
+ ---
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