Fig. 4
From: MLAA-based attenuation correction of flexible hardware components in hybrid PET/MR imaging
Initial attenuation maps and hardware masks. Shown here are the initial CT- or MR-based phantom or patient attenuation maps including the vendor-provided attenuation of stationary hardware components (head coil and patient table) and the corresponding hardware masks (yellow). The hardware mask defines the region where the xMLAA attenuation update is applied to estimate the attenuation of flexible hardware components (headphones or RF coil)