Article Figures & Data
Figures
- Fig 1.
White and gray matter ROIs used for calculating DTI metrics in a single subject. Similar ROIs were used in the second subject. A, Anterior and posterior corpus callosum (red). B–D, Deep white matter (left and right occipital, frontal, and parietal, respectively; blue). E, Left and right periventricular white matter (green). F, Left and right cortical gray matter (gray). G and H, Left and right deep gray matter (putamen, white).
- Fig 2.
Mean DTI measures for different brain regions from each of the 5 magnets. Error bars are SDs.
Tables
Type of Concordance FA λ‖ λ⊥ ADC Overall mean concordance 0.96 0.93 0.93 0.88 Cross-platform mean concordance 0.96 0.92 0.91 0.86 Siemens mean concordance 0.96 0.93 0.93 0.89 GE correlation (1 comparison only) 0.97 0.94 0.94 0.90 Longitudinal mean concordance 0.96 0.96 0.97 0.96 Across-system upgrade 0.95 0.96 0.97 0.96 After system upgrade 0.97 0.95 0.97 0.96 -
↵a Average Lin's concordance coefficients comparing different imaging conditions across all regions from both subjects. Each value represents the mean of the different between-magnet concordance coefficients.
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Scanner Comparison CV across ROIs FA λ‖ λ⊥ ADC Across 5 scanners Overall CV (%), white matter only CV (%) 9.1 5.0 6.6 4.8 6.8 4.3 4.3 4.1 Same scanner with time Overall CV (%), white matter only CV (%) 9.6 3.7 4.2 2.2 8.7 3.5 4.6 2.2 -
Average CV averaged across ROIs for the 5 different scanners and within a single scanner with time.
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