First dose-map measured with a polycrystalline diamond 2D dosimeter under an intensity modulated radiotherapy beam

A prototype of bidimensional dosimeter made on a 2.5 x 2.5 cm(2) active area polycrystalline Chemical Vapour Deposited (pCVD) diamond film, equipped with a matrix of 12 x 12 contacts connected to the read-out electronics, has been used to evaluate a map of dose under Intensity Modulated Radiation Therapy (IMRT) fields for a possible application in pre-treatment verifications of cancer treatments. Tests have been performed under a 6-10 MVRX beams with IMRT fields for prostate and breast cancer. Measurements have been Laken by measuring the 144 pixels in different positions, obtained by shifting the device along the xly axes to span a total map of 14.4 x 10 cm(2). Results show that absorbed doses measured by our pCVD diamond device are consistent with those calculated by the Treatment Planning System (TPS). (C) 2015 Elsevier B.V. All rights reserved.