Matrix documenting the number of unneeded rescans and recalls created by the DL approach with different thresholds, assuming that the series were scanned to rule out strokea
| DL (T = 0.5) | DL (T = 0.1) | DL (T = 5e–4) | DL (T = 1e–6) | |||||
|---|---|---|---|---|---|---|---|---|
| Rescans | Recalls | Rescans | Recalls | Rescans | Recalls | Rescans | Recalls | |
| D1 | 25 | 0 | 16 | 0 | 11 | 0 | 4 | 0 |
| D2 | 15 | 1 | 8 | 3 | 3 | 3 | 0 | 7 |
| D3 | 20 | 0 | 13 | 2 | 8 | 2 | 3 | 4 |
| D4 | 17 | 1 | 10 | 3 | 6 | 4 | 2 | 7 |
| D5 | 20 | 1 | 12 | 1 | 7 | 1 | 2 | 3 |
| Mean ± SD | 19.4 ± 3.8 | 0.4 ± 0.2 | 11.8 ± 1.4 | 1.8 ± 1.3 | 7 ± 2.9 | 2 ± 1.6 | 2.2 ± 1.5 | 4.2 ± 3 |
↵a All numbers are from the 49 test series. Here D1–D5 represent the same individuals as in Tables 1 and 2. Physician D0, whose ratings were used to train the DL algorithm, is now absent (as in Table 2) because no “stroke” ratings were available for this reader.