Titlebook: Radiotherapy Treatment Planning; New System Approache Olivier Cyrille Louis Haas Book 1999 Springer-Verlag London 1999 measurement.radiatio

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Book 1999udes: a presentation of current practice, techniques and equipment used by medical physicists and others to deliver radiotherapy treatment; a systems modelling approach in the formulation of a beam model for optimisation, describing the effect of X-rays on human body tissues; a deterministic approac

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Formulation of Matrix Based Beam Model,e 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.)

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Beam Characteristics and Preliminary Modelling Considerations,he treatment. It has been seen in Chap. 2 that present day RTP systems offer the possibility to make use of three dimensional (3-D) information to determine clinically acceptable plans. However there is not yet a RTP system that offers optimisation algorithms to determine automatically optimal 3-D t

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Solving the Inverse Problem in Radiotherapy Treatment Planning,se, where all the objectives can be solved uniquely, the objectives are in general conflicting in nature [3, 35, 80, 101, 119]. For example in radiotherapy one objective is to deliver a high dose to the PTA, and another one is to minimise the dose delivered to the OHT. Ideally 100% dose in the PTA i

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Hybrid Genetic Algorithms Applied to Radiotherapy Treatment Planning,em. However calculus based methods have several drawbacks including the possibility of becoming trapped in local optima and the limitation to objectives formulated in a quadratic form which, given the multi-objective nature of the problem, may not be the optimal formulation.

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Experimental Verification of Overall Approach,olved in the practical implementation of beam intensity modulation via patient specific compensators. By drawing on the RTP optimisation techniques presented in the previous Chap., the remaining practical procedures involved in the determination of optimal intensity modulated beams (IMBs), and hence

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