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Feature database composition.
| Data set | Total number of images | Number of malignant lesions | Number of benign lesions | Total number of lesion features calculated |
|---|---|---|---|---|
| Training and cross-validation set | 2956 | 158 | 968 (401 mass; 567 cystic) | 81 |
| Independent test set | 369 | 54 | 47 (34 mass; 13 cystic) | 81 |
