Table 1. Number of inadequate scans at each age, with reason for inadequacy.
| Age (years) | Reason for inadequate scan | Total | ||||
|---|---|---|---|---|---|---|
| Poor temporal window | Patient compliance | All vessels not identified | Unknown | Machine limitation | ||
| 0 | 0 | 2 | 0 | 0 | 0 | 2 |
| 1 | 8 | 19 | 0 | 9 | 1 | 37 |
| 2 | 39 | 64 | 8 | 16 | 2 | 129 |
| 3 | 20 | 16 | 9 | 12 | 0 | 57 |
| 4 | 13 | 3 | 4 | 10 | 0 | 30 |
| 5 | 10 | 1 | 7 | 5 | 0 | 23 |
| 6 | 9 | 3 | 6 | 4 | 0 | 22 |
| 7 | 8 | 2 | 9 | 0 | 0 | 19 |
| 8 | 9 | 0 | 5 | 0 | 0 | 14 |
| 9 | 8 | 1 | 3 | 2 | 0 | 14 |
| 10 | 5 | 0 | 1 | 0 | 1 | 7 |
| 11 | 6 | 0 | 4 | 5 | 0 | 15 |
| 12 | 10 | 0 | 5 | 3 | 0 | 18 |
| 13 | 10 | 0 | 7 | 4 | 0 | 21 |
| 14 | 14 | 0 | 7 | 4 | 0 | 25 |
| 15 | 6 | 0 | 8 | 4 | 0 | 18 |
| 16 | 7 | 0 | 7 | 3 | 0 | 17 |
| 17 | 5 | 0 | 1 | 0 | 0 | 6 |
| Total | 187 | 111 | 91 | 81 | 4 | 474 |