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. 2022 Mar 25;23(6):e13586. doi: 10.1002/acm2.13586

TABLE A3.

Bias and reproducibility of longitudinal measurements over 4 weeks

ADCn (10−3 mm2/s)
μL
μL
σL
RL
BL (%) COVL (%)
1.127 1.114 1.115 0.006 0.012 −1.2 0.5
0.843 0.845 0.846 0.009 0.020 0.2 1.1
0.607 0.603 0.601 0.008 0.018 −0.7 1.3
0.403 0.399 0.400 0.006 0.013 −1.0 1.5
0.248 0.244 0.245 0.006 0.013 −1.6 2.5
0.128 0.139 0.140 0.003 0.008 8.6 2.2
T1n (ms)
1879.0 1895.9 1906.4 44.7 150.4 0.9 2.4
1432.0 1385.5 1396.7 28.9 93.6 −3.2 2.1
1027.0 1022.4 1025.1 17.2 45.2 −0.4 1.7
751.3 750.5 752.6 15.7 47.2 −0.1 2.1
527.0 525.7 527.7 11.4 32.9 −0.2 2.2
384.1 362.8 363.4 10.7 31.5 −5.5 2.9
T2n (ms)
258.4 259.4 259.9 4.0 12.6 0.4 1.5
186.1 190.2 190.3 1.7 5.2 2.2 0.9
137.0 133.1 133.0 1.7 5.8 −2.8 1.3
89.5 94.2 94.4 0.8 2.3 5.3 0.8
62.8 67.5 67.5 0.5 1.3 7.5 0.7
43.8 47.4 47.6 0.5 1.2 8.2 1.1

Note: ADCn/T1n/T2n, nominal apparent diffusion coefficient (ADC)/T1/T2; μL/μL/σL/RL, mean/median/standard deviation/range of longitudinal measurements (in units of their respective quantitative magnetic resonance imaging (qMRI) biomarker); BL/COVL, bias and coefficient of variation of longitudinal measurements.