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A MONTE CARLO SOLUTION FOR EXTERNAL BEAM PHOTON RADIOTHERAPY VERIFICATION

In this work, Monte Carlo (MC) simulations provide an answer to the surging clinical need for verifying complex radiation treatments. As will be demonstrated, this solution attained accuracy (2% in dose prediction) and versatility (over a wide range of clinical setups) known to be unachievable by other techniques. The solution is not impeded by long runtimes since it has been successfully implemented on the Grid. It can therefore be clinically productive. Implementation on the UK National Grid Service will be reported. This work also draws from MC simulation information beyond physical measurements, such as details about radiation interactions in a radiotherapy imager. Aided by this knowledge, we designed a simplified, substitute imager which reduces MC runtimes. It can also be useful for other dosimetric computation techniques where detailed modelling is unavailable. Additionally, we report a MC study on how a general assumption in non-MC techniques leads to inaccurate dose prediction.