Dose 2016

Pencil kernel characterization

II. Iterative optimisation of kernel shape

Optimal 6MV kernel profile at 5cm depth

Modified kernels from iterative optimisation using central kernel value in the search for the best match between calculated dose (using then actual fluence pattern) and measured dose

initial (‘ion chamber’) kernel at 5cm depth (2.5mm resolution)

6MV (Varian 21EX), Pencil kernels optimisation on Eclipse TPS (PBC model)

Bergman et al (2004) Med Phys 31 , 3279-87