ESTRO course Dose Modelling and Verification 2017

48

Resuming an interrupted wedge treatment

The time varying fluence distribution means that an interrupted treatment can not be resumed without information about the delivered fraction (not necessary for physical wedges). Hence, both delivered and remaining/given MUs must be known by the accelerator control software.

Siemens Virtual Wedge

Physical wedge

Varian EDW

2

2

2

1

1

1

Note: Impossible to deliver few MUs using dynamic/virtual wedge!

T Knöös

Warsaw 2017