Table 3.
Comparisons of summary statistics with noise correction using different implementations of RETROICOR.
| %Δ σ | %Δ Max R2a | %Δ Mean R2a | %Δ Activation | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Sampling Rate (Hz): | 40 | 200 | 40 | 200 | 40 | 200 | 40 | 200 | |
| 1.5 T | RB vs. none | -1.60 | -1.63 | 2.18 | 2.87 | 57.97 | 56.82 | -10.86 | -7.04 |
| PPG vs. none | -1.68 | -1.59 | -0.48 | -0.19 | 56.39 | 57.98 | -2.20 | -0.36 | |
| RETROICOR vs. none | -8.00 | -8.17 | 41.28 | 44.08 | 224.72 | 227.32 | -14.45 | -15.79 | |
|
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| Sampling Rate (Hz): | 40 | 500 | 40 | 500 | 40 | 500 | 40 | 500 | |
|
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| 3.0 T | RB vs. none | -1.97 | -1.93 | 3.66 | 2.86 | 37.61 | 37.05 | 1.10 | 3.24 |
| PPG vs. none | -1.68 | -1.59 | 1.95 | 3.12 | 33.73 | 33.77 | -0.13 | -0.50 | |
| RETROICOR vs. none | -9.62 | -10.35 | 64.90 | 66.44 | 230.63 | 240.32 | -5.80 | -9.06 | |
Legend: The sampling rate at the top of each column denotes the native (40 Hz) or modified (200 or 500 Hz) implementation. Values listed are the percent difference in the parameter between the two analyses listed for comparison; no statistically significant differences were detected. RETROICOR includes both RB and PPG correction components.