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Suitability of Diodes for Point Dose Measurements in IMRT/VMAT Beams
International Federation for Medical and Biological Engineering Proceedings
This study investigated a potential source of inaccuracy for diode measurements in modulated beams; the effect of diode housing asymmetry on measurement results. The possible effects of diode housing asymmetry on the measurement of steep dose gradients were evaluated by measuring 5x5 cm 2 beam profiles, with three cylindrical diodes and two commonly used ionization chambers, with each dosimeter positioned in a 3D scanning water tank with its stem perpendicular to the beam axis (horizontal) anddoi:10.1007/978-3-319-19387-8_160 fatcat:gsk75syzhfg7rcrra453gan7vq