| PTV | Number |
| PTV Volume < 10 cm3 | 2 |
| PTV Volume > 100 cm3 | 1 |
| PTV Volume (10 − 50 cm3) | 17 |
| PTV663 Mean Volume (cm3) | 23.78 ± 3.19 |
| PTV664Mean Volume (cm3) | 25.19 ± 4.33 |
| t (Z) | −4.49 |
| P | 0.001 |