Fig. 3From: Applications of various range shifters for proton pencil beam scanning radiotherapya–c CBCT images of the RANDO phantom on a 7.5 cm solid water phantom; d–f CBCT images of the RANDO phantom on a 3.5 cm G-10 CTB (7.35 cm WET). Artifacts are observed and the bony structures are blurred in the axial view. The green crosses in the images represent the imaging isocenters and the similar isocenter locations indicate the same CBCT scanning geometryBack to article page