A radiotherapy apparatus comprising a radiation source configured to radiate a radiation ray, a multi leaf collimator, including a plurality of leaves, configured to limit a radiation range of the radiation ray and a drive unit configured to move at least one of the leaves with an ultrasonic wave. A drive feeding roller extends in a main scanning direction of the recording head. A reading unit present in the respiration system reads the contents of a transponder connected to the respiratory flow sensor, so that the respiration system is ready to operate only after the operating data have been read. The use of a plurality of systems for the control of the dissolution of the active ingredient modulates the dissolution rate of the active ingredient in aqueous andor biological fluids, thereby controlling the release kinetics in the gastrointestinal tract.