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Modelling mould attenuation for liquid metal compensators

Goodband J., Haas O., Mills J.

Systems Science

2005

Vol. 31, no 1

45-52

The paper reports on investigative work into the possibility of using a liquid-metal (e.g., mercury), as a viable substitute for solid metals in intensity-modulated radiation therapy (IMRT). As part of this work, the use of moulded plastic containers is studied. The attenuation characteristics of the moulds are found to significantly affect the accuracy of a dose distribution model. An algorithm is therefore devised to predict the change in attenuation properties and is integrated into the model, thereby halving the maximum predictor error.