Three approaches to Phantom Fluid Selection for Simultaneous PET / MR Hybrid Imaging

Figure 2: MR images of fluids measured with a T1 FLASH sequence and a Dixon VIBE used for μ-map generation for PET attenuation correction. Measurement of B1-homogeneity (right two columns). B1-maps and flip angle profiles along the vertical center line in transversal orientation show deviation from excited 90° flip angle. Increasing B1-homogeneity when using phantom fluids with decreasing relative permittivity εr according to Table 1 can be observed.