Uptake of liposomal gadolinium-formulations and Magnevist into (right) F98 and (left) LN229 cells. Gd-concentration (logarithmic scale) in LN229 and F98 cells after 3 h incubation with liposomal Magnevist formulations (lipid concentration 1 mg/ml, respective Gd-concentration cf. Table 1) and free Magnevist (0.34 mg Gd/ml). Gd-concentration was determined via ICP-MS. Results are arithmetic means of at least three experiments, error bars represent SD. *** p < 0.001, ANOVA, Tukey’s multiple comparison.