IMRT 2017

Octavius4D + 2D Array 1500: Versa HD VMAT • Greater uncertainty than in “classical” 2D verification using 2D Array Seven29 • Additional step (projection of measurement dose plane) • PDDs (unc. in depth dose distribution meas.) • Inclinometer (accuracy and sync. with array meas.) • Angular discretization of TPS calculation Know very well your LINAC, TPS and Measurement Devices (weak points, limitations, etc) QA: plan measurement

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