Formulation of Matrix Based Beam Model
Having highlighted in Chap. 2 the fundamental underlying physical characteristics of a photon beam, this Chap. develops a matrix based beam model which is used for the purpose of optimisation of the intensity modulated beams (or individual pencil beams). Essentially the inputs to the model (which are required to be optimised) are the resulting intensity modulated beam (IMB) profiles of a predetermined number of beams in a given treatment plan. (It is shown later in Chap. 5 that it is also possible to optimise the number and orientation of the beams prior to optimising their IMBs.)
KeywordsBeam Model Parallel Beam Primary Dose Pencil Beam Percentage Depth Dose
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