Table 2.
Correct (TP, TN) and erroneous (FP, FN) decisions grouped according to the dwell time of the reader who made the corresponding decision
| Reader | Dwell | Malignant | Benign | Normal |
|---|---|---|---|---|
| 1 | Long | 9 TPs+2 FNs | 2 TPs+0 FNs | 12 TNs+1 FP |
| Short | 3 TPs+0 FNs | 3 TPs+0 FNs | *+1 FP | |
| No | 0 TPs+0 FNs | 0 TPs+0 FNs | *+0 FPs | |
| 2 | Long | 6 TPs+0 FNs | 4 TPs+0 FNs | 15 TNs+1 FP |
| Short | 5 TPs+2 FNs | 1 TPs+0 FNs | *+1 FP | |
| No | 0 TP+1 FN | 0 TPs+0 FNs | *+0 FP | |
| 3 | Long | 7 TPs+2 FNs | 2 TPs+1 FN | 16 TNs+0 FPs |
| Short | 4 TPs+1 FN | 1 TP+0 FNs | *+0 FPs | |
| No | 0 TP+0 FNs | 0 TPs+1 FN | *+0 FPs | |
| 4 | Long | 10 TPs+1 FN | 3 TPs+0 FNs | 16 TNs+2 FPs |
| Short | 2 TPs+0 FNs | 2 TPs+0 FNs | *+0 FPs | |
| No | 0 TPs+1 FN | 0 TPs+0 FNs | *+0 FPs | |
| 5 | Long | 8 TPs+0 FNs | 3 TPs+0 FNs | 14 TNs+1 FP |
| Short | 6 TPs+0 FNs | 2 TPs+0 FNs | *+0 FPs | |
| No | 0 TPs+0 FNs | 0 TPs+0 FNs | *+0 FPs | |
| 6 | Long | 9 TPs+0 FNs | 4 TPs+0 FNs | 10 TNs+1 FP |
| Short | 3 TPs+2 FNs | 1 TPs+0 FNs | *+0 FPs | |
| No | 0 TPs+0 FNs | 0 TPs+0 FNs | *+0 FPs |
*Indicates all normal breast parenchyma which the radiologist spent <1 s viewing and correctly decided not to report.
FN, false negative; FP, false positive; TN, true negative; TP, true positive.