Fig. 5From: An automatic pipeline for PET/MRI attenuation correction validation in the brainMR to CT based PET attenuation correction bias in a FreeSurfer extracted T1 ROIs in the parietal and temporal cortex. For relative (a–c) and absolute bias (d–e), ROIs were reconstructed with and without background activity (a, b) and the original PET images in (c). Same order is followed in Sub-figures (d–f)Back to article page