The first subject will be the chronology of IMRT in our institute, then a physicist should talk a little bit about dosimetry, so here I'm going to discuss how we verified our patient plans during commissioning and also for every new IMRT patient. This is followed by an excursion to beam gating, because I think that this is an interesting phenomenon, which also had some impact on clinical routine. Then I'm going to explain how we integrated VARiS and Vision. Some statistical data from the VARiS database closes this clinical section. Finally I'm going to present our experiments concerning the verification of fluence delivery of DMLC treatments.