Fig. 6From: A comparative study of dose distribution of PBT, 3D-CRT and IMRT for pediatric brain tumors a Average normal brain dose for each treatment plan, using two oblique angle irradiation for 3D-CRT and PBT, with sphere targets with the same diameter and different iso-centers at 0, 1, 2, 3, and 4 cm from the brain center. b Correlation between target position and difference in normal brain dose in PBT compared to 3DCRT or IMRTBack to article page