Basic Treatment Planning

Inverse Planning

• For each IMRT plan the planner may also be expected to stipulate:  Beam Energy (Usually 6 MV is standard)  Fixed Field or Rotational  Number of beams (Usually 7 or 9 if fixed,)  Number of iterations (attempts) • TPS then calculates the pattern of beam intensity or fluence map of the treatment beams through weight optimisation

• Several modifications of parameters may be needed to achieve an optimal or best case plan