IMRT

Intensity modulation and interconnectivity: VMAT

Beamlet dose/gantry angle

Segment Interconnectivity

Gantry angle rotation

Gantry angle rotation

Beamlet total dose contribution

“ Limited amount of change allowed between subsequent segments due to technical limitations (more than for HT)” “Smooth changes”

A i+2 DR i+2 G i+3 GS i+3

A i+1 DR i+1 G i+1 GS i+1

A i DR i G i GS i