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Table 2 R1 mean % bias, precision (SD of % bias) and correlation coefficient (r) for all clusters of brain regions when comparing Atlas-, ZTE- and MaxProb-MRAC against 68Ge-MRAC. Additionally, slope and intercept of Deming regression lines are given

From: Accuracy and precision of zero-echo-time, single- and multi-atlas attenuation correction for dynamic [11C]PE2I PET-MR brain imaging

Brain region MRAC % bias SD r Slope Intercept
WB Atlas 0.44 1.67 0.98 1.12 -0.10
ZTE 0.99 1.21 1.00 0.94 0.06
MaxProb 1.37 2.69 0.93 1.11 -0.08
ACR Atlas 1.54* 2.85 0.98 1.10 -0.07
ZTE 1.14 2.49 0.97 1.06 -0.04
MaxProb 2.85* 4.12 0.96 1.07 -0.03
PCR Atlas -0.95 2.91 0.97 1.05 -0.05
ZTE -0.51 1.47 0.99 0.99 0.00
MaxProb 1.14 4.38 0.92 1.06 -0.04
STR Atlas 2.44* 2.53 0.99 0.99 0.03
ZTE 2.71* 2.06 0.99 0.99 0.03
MaxProb 3.17* 3.67 0.98 1.01 0.02
LR Atlas 2.29* 3.26 0.97 1.03 -0.01
ZTE 3.09* 3.33 0.97 1.00 0.02
MaxProb 0.35 3.94 0.98 1.06 -0.04
  1. ACR anterior cortical regions, PCR posterior cortical regions, STR striatal regions, LR limbic regions, WB whole brain
  2. *p value < 0.05. Friedman test with post-hoc tests (comparison to 68Ge-AC) and Dunn’s correction