Abstract: A therapy system comprising a therapy module, e.g. a high-intensity- focused ultrasound transmitter, to perform successive deposits of energy in a target zone, the successive deposits being separated by a cool down period. The therapy system being provided with a thermometry module, e.g. by a magnetic resonance examination system configured for thermometry to measure temperature in a measurement field. A control module regulates the cool down period in dependence of the measured off-focus maximum temperature during the energy deposit preceding the cool down period.

Abstract: A therapy system comprises a therapy module to direct a therapeutic action to a target along successive trajectories in a target region that includes the target. A thermometry module is provided to measure temperature a measurement field and in particular to compute a thermal dose. A control module to controls the therapy module to apply the therapeutic action along the respective trajectories on the basis of the measured temperature and/or thermal dose. The successive trajectories are located in the target zone outward or inward relative to one another within the target zone. In particular the therapeutic action subsists in application a focused ultrasound beam to the target. Temperature measurement is done on the basis of magnetic resonance signals.