Open Field Electron PDDs

The following percentage depth dose (PDD) values were obtained for “open-field” electron beams (that is, with jaws fully open at 40×40 cm² and no applicators attached). The beams were delivered using a Varian 21iX linear accelerator in the process of being commissioned. Dose measurements were made in a water tank at 100 cm SSD using a CC13 ion chamber. Dose values have been normalised to maximum dose. They are presented here as an example only. The data is available in CSV format here.