Figure 4From: Technique for sparing previously irradiated critical normal structures in salvage proton craniospinal irradiationColorwash dose distributions for salvage craniospinal irradiation for case 2. On the left, the dose from the lateral fields with blocks, and in the center, the dose from the lateral inverse apertures. On the right, the composite dose distribution in transverse, coronal and sagittal planes showing the zone of dose avoidance around the previously treated surface of the brainstem.Back to article page