Fig. 4

Transition of the tumour tissue to normal tissue ratio of boron concentrations. This figure shows the time transition of each tumour tissue to normal tissue ratio of boron concentrations. There were no differences in the transition of the tumour tissue to normal tissue ratio between the L-BPA group and [19F]-L-FBPA group. Each continuous infusion value was substituted by the mean value of L-BPA and L-FBPA in continuous infusion protocol. Star signs (*) means significant difference between administration protocols (p < 0.05)