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Dose.Point at the Royal Marsden

20th May 2018

Pictured at a follow up meeting at the Royal Marsden Hospital, Fulham Road, London are (from left): QA Lead, RMH Physics Rollo Moore and Vertec Product Specialist David White. Vertec supplied a Dose.Point RT-smartIMRT cylinder phantom to the Hospital, one of the world’s leading cancer treatment centres.

Rollo comments, “Intensity Modulated Radiotherapy (IMRT) is a contemporary radiotherapy technique developed by a few key institutes but includes fundamental contributions from physicists in the Joint Physics Department of The Royal Marsden NHS Foundation Trust and Institute of Cancer Research. One type of IMRT that is delivered at RMH Fulham Road is volumetric arc therapy, which uses clinical isocentric linear accelerators to produce conformal and selective distributions of therapy X-ray dose within the patient body. In order to gain confidence in the delivery technique or to evaluate the specific patient therapy plan delivery we can use an array of ionisation detectors or a film in this simple, reliable, versatile and economical phantom. It has a direct method of mechanical connection to the linac gantry, with a carbon fibre frame and rod and hook-and-eye fabric. The phantom is also configurable for field light checks and other isocentric quality assurance tests, but it is particularly useful as it permits comparison of array measurements with previously calculated distributions as if the gantry was static, thus obviating any correction for array angle.”


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