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Table 2 Correlation coefficient r, slope and intercept of orthogonal regression across subjects for SUVR values in different brain clusters when comparing ZTE- and atlas-attenuation correction (AC) with 68Ge-AC. In addition, mean bias (%) and accuracy (SD of % bias) are given

From: Evaluation of zero-echo-time attenuation correction for integrated PET/MR brain imaging—comparison to head atlas and 68Ge-transmission-based attenuation correction

AC Brain region r Slope Intercept % bias SD
ZTE STR 0.99 1.00 0.02 1.4* 2.1
LR 0.96 0.94 0.08 2.6* 2.8
ACR 0.97 1.14 − 0.12 0.2 2.8
PCR 0.97 1.01 − 0.02 − 1.3* 1.6
WB 0.94 0.97 0.03 0.5 0.9
Atlas STR 0.99 1.00 0.07 4.4* 3.2
LR 0.94 0.94 − 0.01 4.4* 3.5
ACR 0.92 1.23 − 0.16 4.8* 4.8
PCR 0.77 1.21 − 0.17 3.4* 5.6
WB 0.68 1.41 − 0.35 2.9 2.9
  1. STR striatum, LR limbic regions, ACR anterior cortical regions, PCR posterior cortical regions, WB whole-brain
  2. *p value < 0.05