4D and 2D PCMRI-based estimation of arterial pulsatility
| Vessel Type | n | ΔV 4D Mean ± SD (mL) | ΔV 2D Mean ± SD (mL) | Difference Mean ± SD (mL) | P Value | |
|---|---|---|---|---|---|---|
| All | BA | 10 | 0.20 ± 0.08 | 0.21 ± 0.08 | 0.01 ± 0.05 | .504 |
| ICA | 20 | 0.35 ± 0.10 | 0.36 ± 0.10 | 0.01 ± 0.06 | .656 | |
| ICAa | 20 | 0.35 ± 0.10 | ||||
| MCA | 20 | 0.23 ± 0.05 | 0.20 ± 0.05 | −0.03 ± 0.04 | .006 | |
| ACA | 19 | 0.14 ± 0.08 | 0.12 ± 0.08 | −0.02 ± 0.05 | .102 | |
| ΔHR | BA | 4 | 0.16 ± 0.07 | 0.17 ± 0.07 | 0.01 ± 0.01 | .268 |
| <5% | ICA | 8 | 0.33 ± 0.05 | 0.33 ± 0.05 | −0.01 ± 0.03 | .668 |
| MCA | 8 | 0.21 ± 0.04 | 0.20 ± 0.04 | −0.02 ± 0.03 | .116 | |
| ACA | 11 | 0.14 ± 0.06 | 0.13 ± 0.06 | −0.02 ± 0.03 | .074 |
Note:—BA indicates basilar artery; ICA, internal carotid artery; MCA, middle cerebral artery; ACA, anterior cerebral artery; ΔHR, difference in heart rate; ΔV, volume of arterial pulsatility.
↵a Indicates proximal ICA measurement for internal consistency analyses.