Table 1.
Overview on measurements corrupted with motion on different timepoints of the scan (sections).
| Timepoint and speed of motion | No motion | First section | Middle section | Last section | ||||
|---|---|---|---|---|---|---|---|---|
| Baseline | Control | Slow | Fast | Slow | Fast | Slow | Fast | |
| Mean heart rate (± SD) by ECG in 1/min | 64.2 (± 10.6) | 63.0 (± 9.4) | 63.3 (± 10.1) | 63,4 (± 9,5) | 62.4 (± 9.4) | 62.8 (± 9.2) | 63.1(10.5) | 62.7 (± 9.5) |
| Number of scans with successful MOG/total number of scans available for MOG | 20/20 | 20/20 | 20/20 | 19/19 | 18/20 | 19/19 | 20/20 | 19/19 |
| Mean heart rate (± SD) by MOG in 1/min | 64.5 (± 10.9) | 63.1 (± 9.1) | 61.35 (± 10.7) | 63.1 (± 8.6) | 60.8 (± 12.9) | 57.85 (± 7.0) | 61.7 (± 11.3) | 62.25 (± 9.1) |
| Difference between heart rate by ECG and MOG (± SD) in 1/min; p-value | − 0.3 (± 4.3); 0.83 | − 0.1 (± 1.4); 0.91 | 1.95 (± 2.2); 0.02 | 0.3 (± 2.1); 0.66 | 1.6 (± 8.8); 0.58 | 4.9 (± 4.9); 0.01 | 1.4 (± 1.6); 0.02 | 0.45 (± 1.2); 0.28 |
| Corrected motion amplitude (range) in mm/variability (± SD) over the protocol in mm | 11.2 (9.4–13.8)/0.04 (± 0.39) | |||||||
| Corrected motion speed (cm/s) | – | 0.57 (± 0.13) | 1.15 (± 0.27) | 0.57 (± 0.13) | 1.15 (± 0.27) | 0.57 (± 0.13) | 1.15 (± 0.27) | |
| Successful measurements of the carotid artery/total scans available after MOG | 20/20 | 20/20 | 20/20 | 19/19 | 18/18 | 19/19 | 20/20 | 19/19 |
| Carotid artery: mean flow rate (ml/kg/min) | 4.2 (± 1.1) | 4.2 (± 1.2) | 4.3 (± 1.1) | 4.2 (1.2) | 2.5 (± 1.1) | 2.8 (± 1.1) | 4.2 (± 1.1) | 4.2 (± 1.1) |
| Carotid artery: mean difference from baseline (± SD) in % | – | − 0.3 (± 7.3) | 1.7 (± 6.4) | 0.8 (± 6.9) | − 39.1 (± 20.6) | − 32.1 (± 17.9) | 0.8 (± 4.2) | 1.0 (± 6.5) |
| Carotid artery: p-values | – | 0.9997 | 0.7109 | 0.9945 | < 0.0001 | < 0.0001 | 0.9215 | 0.969 |
| Carotid artery: mean flow difference between fast and slow motion (± SD) in %; p-value | – | 1.0 (± 3.9); 0.27 | 6.9 (± 14.3); 0.04 | 0.2 (± 3.8); 0.81 | ||||
| Successful measurements of the jugular vein/total scans available after MOG | 19/20 | 19/20 | 19/20 | 18/19 | 16/18 | 17/19 | 19/20 | 18/19 |
| Jugular vein: mean flow rate (ml/kg/min) | 3.1 (± 1.1) | 3.1 (± 2.1) | 3.1 (± 2.0) | 3.0 (± 2.2) | 2.2 (± 1.6) | 1.8 (± 1.8) | 3.1 (± 2.2) | 3.1 (± 2.2) |
| Jugular vein: mean difference from baseline (± SD) in % | – | − 5.8 (± 14.1) | − 1.6 (± 21.0) | − 4.2 (± 19.5) | − 36.1 (± 33.1) | − 47.0 (± 26.9) | − 0.9 (± 12.8) | − 5.6 (± 25.1) |
| Jugular vein: p-values | – | 0.4265 | 0.9996 | 0.9048 | 0.0015 | < 0.0001 | 0.9996 | 0.8797 |
| Jugular vein: mean flow difference between fast and slow motion (± SD) in %; p-value | – | − 5.0 (± 27.7); 0.47 | − 10.9 (± 37); 0.23 | − 4.7 (± 20.8); 0.35 | ||||
| CoV (± SD) of two repeats in % | 5.9 (± 11.3) | 6.4 (± 8.7) | 5.6 (± 8.4) | 7.1 (± 14.2) | 32.5 (± 35.5) | 25.0 (± 31.0) | 5.7 (± 7.2) | 4.9 (± 9.6) |
| Mean score of raw image data | 0 | 0 | 0.9 | 0.8 | 2 | 2 | 0.8 | 0.9 |
CoV coefficient of variation, SD standard deviation.
Significant values are in bold.