Abstract: A medical apparatus (300, 400, 500, 600) comprising a magnetic resonance imaging system (302). The medical apparatus further comprises a heating system (320, 502, 601) operable for heating a target zone (321) and a processor (326). Execution of machine readable instructions causes the processor to receive (100, 200, 700, 800) a treatment plan (340). Execution of the instructions further cause the processor to repeatedly: control (102, 204, 704, 804, 900, 1002) the heating system, using the treatment plan, to heat the target zone during alternating heating periods and cooling periods; acquire (104, 208, 702, 706, 802, 806, 902, 906, 1000, 1004) magnetic resonance data using the magnetic resonance imaging system, and modify (110, 214, 712, 812, 1008) the treatment plan using the magnetic resonance data. The instructions cause the processor to acquire the magnetic resonance data during a cooling period selected from at least one of the cooling periods.

Abstract: The invention provides for a medical apparatus (500, 700, 800) comprising a high intensity focused ultrasound system (506). The medical apparatus further comprises a memory (550) for storing machine executable instructions (560, 562) for execution by a processor (544). Execution of the instructions cause the processor to: receive (100, 200, 304) previous sonication data (522) descriptive of a previous sonication of the subject; construct (102, 202, 306) a thermal property map (554) of the subject using the previous sonication data and a thermoacoustic model (562); determine (104, 204, 308) a maximum energy map (556) using the thermoacoustic model and the thermal property map, wherein the maximum energy is time dependent; display (106, 206, 310) the maximum energy map on a display (672); and receive (108, 208, 312) a selection of at least one thermoacoustic model and thermal property map sonication volume (580, 582) from a user interface (570).

Abstract: A medical apparatus (300, 400, 500, 600) comprising a magnetic resonance imaging system (302). The medical apparatus further comprises a heating system (320, 502, 601) operable for heating a target zone (321) and a processor (326). Execution of machine readable instructions causes the processor to receive (100, 200, 700, 800) a treatment plan (340). Execution of the instructions further cause the processor to repeatedly: control (102, 204, 704, 804, 900, 1002) the heating system, using the treatment plan, to heat the target zone during alternating heating periods and cooling periods; acquire (104, 208, 702, 706, 802, 806, 902, 906, 1000, 1004) magnetic resonance data using the magnetic resonance imaging system, and modify (110, 214, 712, 812, 1008) the treatment plan using the magnetic resonance data. The instructions cause the processor to acquire the magnetic resonance data during a cooling period selected from at least one of the cooling periods.