Figure 2
From: Positron annihilation localization by nanoscale magnetization

MR and co-registered PET/MR images. (a) Top and bottom panels show close-ups of T2*W MR and PET/MR phantom images for four of the 89Zr-SPION [Fe] concentrations, respectively. (b) MR and PET/MR images for all ten 89Zr-SPION [Fe] concentrations (listed in Table 1). (c) Plot of positron annihilation localization (PAL) as a function of [Fe].