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The distribution of mammograms in the training, development and test sets
| Training | Development | Testing | Total | |
|---|---|---|---|---|
| Fat-infiltrated/positive (axillary) | 266 | 40 | 110 | 416 |
| Normal/negative (axillary) | 267 | 49 | 154 | 470 |
| Nonaxillary/negative | 1291 | 217 | 647 | 2155 |
| Total (axillary only) | 533 | 89 | 264 | 886 |
| Total (both axillary and non-axillary) | 1824 | 306 | 911 | 3041 |
