[en] The use of ions in radiation therapy aims at improving the selectivity of the irradiation thanks to a favorable depth-dose profile and, in case of heavy ions, to their enhanced radiobiological effect. The treatment modality employing actively scanned pencil beams provides highly conformal dose distributions but could be sensitive to uncertainties in the dose calculation, delivery and measurement. In particular, the treatment planning has to evaluate the biological effect of a complex radiation field, using detailed and fine tuned physical and radiobiological models and taking into account different particles and fragments with mixed LET. During the treatment, the delivery of the beam has to be controlled in real time and monitored with high accuracy, including any effect due, for example, to patient position and motion. The talk will give an overview of recent techniques and trends for the delivery, measurement and verification of the dose distribution in charged particle therapy with scanned ion beams, focusing in particular on the monitoring of the deviation from the planned dose due to patient motion and on the measurement of the beam flux with high intensity pulsed beams. (author)