Fig. 2.

Tissue radioactivity values. Mean tissue radioactivity values (nCi/g) for kidney, liver, heart, and frontal cortex, for the 4-h groups of animals. The values for the IV bolus group are the open columns; those from the continuous IV group are the shaded columns, and those of the convection-enhanced delivery (CED) group are the black columns. At 4 h, the tissue ¹⁴C-sucrose levels are lowest in the CED group and highest in the IV bolus group. Error bars are not shown on this 3D plot; however, the SD for each value was approximately the same magnitude as the value itself (see Results).