Survival data of irradiated (A) F98 and (B) LN229 cells, 97 h after irradiation. Cells were treated with liposomal Magnevist formulations or free Magnevist and incubated for 3 h prior to irradiation with thermal neutrons. Cells of the control group were irradiated, but contain no drug. MTT assay was performed 97 h after irradiation. Survival is based on a non-irradiated medium control without drug, results are arithmetic means of three independent experiments, error bars represent SEM. Significant differences in survival compared to control group (irradiated, medium, no drug) are marked with asterisk, * p < 0.05 and ** p < 0.01 (ANOVA, Tukey’s multiple comparison test).