Dose Course 2018_Flipping book

Model based dose calculations Energy fluence engine, multisource models

Finite photon source size

Open fluence distribution

Fluence modulation – Step&shot

– Dynamic – Wedges

Treatment head processes to model

Head scatter sources – flattening filter – collimators – wedges

Back scatter from collimators to monitor

Collimator leakage , including – MLC interleaf leakage – shape of MLC leaf ends

Beam spectra

Spectral changes

Electron contamination

3

Made with FlippingBook HTML5