Figure 3From: Preclinical investigations towards the first spacer gel application in prostate cancer treatment during particle therapy at HITSchematic drawing of the phantom design used for the PET study. Several PMMA plates were inserted into a PMMA box, with the spacer gel sample in between. The remaining space downstream the beam direction was filled with gelatin. The phantom was positioned such that the pencil beam entered the geometrical centre of the gel sample.Back to article page