A radiotherapy treatment system comprising: a radiotherapy gantry configured to rotate around gantry axis ; a treatment head mounted to the radiotherapy gantry to emit a treatment radiation beam; wherein the treatment head is configured to move on one or more axis other than the gantry axis of the radiotherapy gantry ; ; and a processor configured to: receive an indication of occurrences of a substantially periodic treatment opportunity for a target volume of a patient from a motion detecting device , the treatment opportunity being a period of time the target volume is in a position to be irradiated according to a burst mode treatment plan to be administered by the treatment head ; determine a future treatment opportunity for a target volume of a patient , the future treatment opportunity being a period of time the target volume will be in a position to be irradiated according to the burst mode treatment plan in the future; begin synchronization of a prescribed delivery period of burst mode irradiation and the future treatment opportunity; present, to the patient , an indication of timing data indicative of a time until the prescribed delivery period of burst mode irradiation will occur; and irradiate the target volume during the synchronization of the future treatment opportunity and the prescribed delivery period of burst mode irradiation. a radiotherapy gantry configured to rotate around gantry axis ; a treatment head mounted to the radiotherapy gantry to emit a treatment radiation beam; wherein the treatment head is configured to move on one or more axis other than the gantry axis of the radiotherapy gantry ; ; and a processor configured to: receive an indication of occurrences of a substantially periodic treatment opportunity for a target volume of a patient from a motion detecting device , the treatment opportunity being a period of time the target volume is in a position to be irradiated according to a burst mode treatment plan to be administered by the treatment head ; determine a future treatment opportunity for a target volume of a patient , the future treatment opportunity being a period of time the target volume will be in a position to be irradiated according to the burst mode treatment plan in the future; begin synchronization of a prescribed delivery period of burst mode irradiation and the future treatment opportunity; present, to the patient , an indication of timing data indicative of a time until the prescribed delivery period of burst mode irradiation will occur; and irradiate the target volume during the synchronization of the future treatment opportunity and the prescribed delivery period of burst mode irradiation. receive an indication of occurrences of a substantially periodic treatment opportunity for a target volume of a patient from a motion detecting device , the treatment opportunity being a period of time the target volume is in a position to be irradiated according to a burst mode treatment plan to be administered by the treatment head ; determine a future treatment opportunity for a target volume of a patient , the future treatment opportunity being a period of time the target volume will be in a position to be irradiated according to the burst mode treatment plan in the future; begin synchronization of a prescribed delivery period of burst mode irradiation and the future treatment opportunity; present, to the patient , an indication of timing data indicative of a time until the prescribed delivery period of burst mode irradiation will occur; and irradiate the target volume during the synchronization of the future treatment opportunity and the prescribed delivery period of burst mode irradiation. <EOS>