Dose Course 2018_Flipping book

Accuracy and limitations

• Factors affecting DVH accuracy: – Accuracy to which VOI is delineated (Main contribution) – Dose bin size – Distance Map voxel size – Sampling method and sampling resolution

– Shape of VOI – Dose grid size

• ICRU 91 (1-2mm for FS<3x3, 2-5mm FS>3x3) – Dose Calculation Algorithm (difference in modelling heterogenities, penumbra…)

Dublin 2018