Dose Course 2018_Flipping book

Modelling

Once the beam data and machine parameters have been introduced, the beam model should be completed according vendors instructions

The amount of adjustable parameters depends on the vendor

i.e. Varian: second source (size, mean energy, relative intensity), MLC (DLS, transmission), spot size.

Therefore modelling is an iterative process when a compromise for the different clinical situations in which it be used has to be reached.

Evaluate the goodness of the model by Comparing PDDs and profiles using the softare beam commissioning application