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Alt 1: Using Dose profiles & Output factors
• Dose profiles reshaped using factors
deduced from first order, point source
fluence changes
• Workhorse in old time “2D” TPS and
current Monitor Unit Check programs
6
• OK for a limited set of field geometries
at non-violated equilibrium conditions,
e.g. stereotactical treatments
•
Breaks down for general
CRT/IMRT/VMAT conditions!