Our methods of plan verification are conventional, we use ionization chamber and film. We prefer to split up the IMRT plan into separate phantom plans, one for each field, with the fluence imported from the clinical plan, and dose calculated at certain points in CadPlan. Then the usual comparison between plan and measurement takes place. The dosimetric agreement was in the acceptable range, up to about 4% maximum deviation in the regions with low dose gradient. We started with a chamber that had a rather large volume and switched to a PinPoint chamber because of its higher resolution.