Reliability of ultrasound scoring of 10 specimens
| Specimen | Ultrasound first observer 1. round | Ultrasound second observer 1. round | Ultrasound first observer 2. round | Ultrasound second observer 2. round |
| 1 | 2 | 2 | 2 | 2 |
| 2 | 3 | 3 | 3 | 3 |
| 3 | 1 | 1 | 1 | 1 |
| 4 | 2 | 2 | 2 | 2 |
| 5 | 1 | 1 | 1 | 1 |
| 6 | 3 | 3 | 3 | 3 |
| 7 | 2 | 3 | 2 | 3 |
| 8 | 2 | 2 | 2 | 2 |
| 9 | 1 | 1 | 1 | 1 |
| 10 | 3 | 3 | 3 | 3 |