Article Figures & Data
Figures
- FIG 1.
Bland-Altman plots showing agreement on GM CBF between intra- (upper row) and intersession (lower row) repeated 3D 1800 ms (left column) and 2D 1800 ms (right column) pCASL scans. The asterisk indicates values significantly different from zero (P < .05).
- FIG 2.
Three axial slices from group-averaged CBF maps of all pCASL acquisitions at both field strengths. Average age of participants scanned at 1.5T and 3T was 62 ± 12 years and 56 ± 20 years, respectively. HR indicates high resolution.
- FIG 3.
Boxplots showing WB and GM CBF without PVC and GM with PVC per PLD and field strength. One, two, and three asterisks indicate P values < .05, .01, and .001, respectively.
- FIG 4.
Boxplots showing WB and GM CBF without PVC and GM with PVC, per readout and field strength. One, two, and three asterisks indicate P values < .05, .01, and .001, respectively. HR indicates high resolution.
- FIG 5.
Boxplots showing GM spatial CoV per scan type and field strength. Three asterisks indicate P values < .001. HR indicates high resolution.
Tables
- Table 2:
Spearman’s ρ and corresponding P values between age and ΔCBF and between age and Δspatial CoV from 3D and 2D ASL scans
3D 2D Spearman’s ρ P Value Spearman’s ρ P Value ΔCBF Intrasession –0.18 .31 –0.17 .34 Intersession 0.05 .80 0.05 .78 Δspatial CoV Intrasession 0.07 .71 0.04 .82 Intersession 0.15 .39 0.20 .26 - Table 3:
Intra- and intersession wsCV of GM CBF and GM spatial CoV from 3D 1800 ms and 2D 1800 ms scans
GM CBF GM Spatial CoV 3D 2D 3D 2D Intrasession 1.5T (n = 14) 4.4% 4.0% 7.6% 4.5% 3T (n = 20) 4.7% 6.7% 5.1% 4.3% Intersession 1.5T–1.5T (n = 6) 13.5% 11.7% 6.9% 8.4% 1.5T–3T (n = 14) 10.0% 14.8% 15.5% 19.1% 3T–3T (n = 14) 6.8% 6.6% 11.1% 7.6% - Table 4:
Pair-wise differences (mean ± SD) between observed GM CBF (mL/100g/min), without PVC, from different pCASL acquisitions
3D 1800 ms 2D 1800 ms 3D 1600 ms 3D 2000 ms 3D 1800 ms HR 3T 3D 1800 ms –0.46 ± 1.88a –6.14 ± 1.45b –2.10 ± 3.20bc 2.21 ± 1.85b –3.65 ± 2.00b 2D 1800 ms –0.65 ± 3.13a 4.04 ± 2.95bc 8.35 ± 2.12b 2.49 ± 2.02b 1.5T 3D 1800 ms 0.15 ± 1.77a –11.03 ± 3.21bc –3.78 ± 2.30b 2.83 ± 2.06b 2D 1800 ms 1.15 ± 2.04a 7.25 ± 4.05bc 13.86 ± 3.95bc Note:—HR indicates high-resolution.
↵a Differences between repeated identical pCASL acquisitions with consensus paper parameter settings.
↵b A bias that is significantly different from zero (P < .05).
↵c A significantly different variance across the observed pair-wise differences between acquisitions compared with the variance across the pair-wise differences between repeated consensus paper parameter settings (P < .05).
