Flipping Book - IMRT

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Gantry angle rotation

Beamlet dose/gantry angle

Gantry angle rotation

Beamlet total dose contribution

A

i

DR

i

G

i

GS

i

A

i+2

DR

i+2

G

i+3

GS

i+3

A

i+1

DR

i+1

G

i+1

GS

i+1

“

Limited amount of change

allowed between subsequent

segments

due to technical

limitations (more than for HT)”

“Smooth changes”

Segment Interconnectivity

Intensity modulation and interconnectivity: VMAT