Peak systolic and diastolic CSF velocities in 5 human volunteers at the level of the foramen magnum defined in sagittal images by the tip of the clivus anteriorly and the occipital bone posteriorly
| RPC | CPC | Absolute Difference | |
|---|---|---|---|
| Systolic peak velocity (cm/s) | |||
| Volunteer 1 | 2.2 | 2.4 | 0.2 |
| Volunteer 2 | 4.3 | 4.0 | 0.3 |
| Volunteer 3 | 3.7 | 3.6 | 0.1 |
| Volunteer 4 | 2.1 | 2.2 | 0.1 |
| Volunteer 5 | 2.0 | 2.2 | 0.2 |
| Averagea | 2.9 ± 1.1 | 2.9 ± 0.9 | 0.2 ± 0.1 |
| Diastolic peak velocity (cm/s) | |||
| Volunteer 1 | 1.0 | 1.1 | 0.1 |
| Volunteer 2 | 0.9 | 1.0 | 0.1 |
| Volunteer 3 | 1.6 | 1.4 | 0.2 |
| Volunteer 4 | 0.4 | 0.8 | 0.4 |
| Volunteer 5 | 0.8 | 0.8 | 0.0 |
| Averagea | 0.9 ± 0.4 | 1.0 ± 0.3 | 0.2 ± 0.2 |
a Mean values ± SDs.