Figure 2
2A B 0 field homogeneity across the 9 phantom compartments as a measure of off resonance in Hz at 3T. 2B Diagonal profile of the B 1 field as per green line in 1D comparing relative flip angles on Siemens 3T system. Variance of B 1 was smallest across the 9 compartments with CoV 1.54% for HDPE beads measuring 2 to 4.8 mm. Highly monosized microbeads measured 6µm and were composed of crosslinked PMMA polymer. Neither microbeads, sucrose nor NaCl efficiently flattened the B 1 field. 2C and 2D Variation in the mean T1 and T2 gold standard values and corresponding standard deviation shown as whiskers for all the D model prototype phantoms at 1.5 and 3T.