A radiotherapy apparatus includes a rotatable drum on which is mounted a gantry arm carrying a radiation source. The arm extending from the drum to a location of the radiation source is offset from the axis of rotation of the drum and oriented towards the axis. The radiotherapy apparatus further includes a mechanism configured to apply a tilt to the arm at one or more rotational orientations of the drum. The rotatable drum is supported on wheels beneath the drum, and the mechanism is an eccentric mechanism within the wheels and is configured to apply the tilt to the arm via the wheels.

Systems, devices, and methods for imaging-based calibration of radiation treatment couch position compensations.

The disclosure relates to a patient support device (10) that is connectable to a positioning system (12), such as a multi-joint robot (16), the patient support device (10) comprising: a patient support region (18), comprising a front area (22) which defines a support plane (S) for supporting and/or contacting a patient (P) and an underside area (23) substantially facing away from the front area (22); and a coupling region (26) that is configured to be coupled to the positioning system (12), wherein the support plane (S) at least partially extends between the coupling region (26) and the underside area (23). The disclosure further relates to a patient positioning arrangement comprising such a patient support device (10) and positioning system (12).

Patient's cranial position monitoring and controlling device for controlling an MR-guided radiation source module via a MR-guided radiation controlling device to be connected to the patient's cranial position monitoring and controlling device and a MR-guided radiation system comprising a patient's cranial position monitoring and controlling device, which allows for a better MR-imaging while allowing a patient position monitoring close to the patient.

The disclosure relates to a patient support device (10) that is connectable to a positioning system (12), such as a multi-joint robot (16), the patient support device (10) comprising: a patient support region (18), comprising a front area (22) which defines a support plane (S) for supporting and/or contacting a patient (P) and an underside area (23) substantially facing away from the front area (22); and a coupling region (26) that is configured to be coupled to the positioning system (12), wherein the support plane (S) at least partially extends between the coupling region (26) and the underside area (23). The disclosure further relates to a patient positioning arrangement comprising such a patient support device (10) and positioning system (12).

Controlling unit for a radiation source includes a mains-driven power supply terminal connectable to a mains-driven power supply, a battery-driven power supply terminal connectable to a battery-driven power supply, a failsafe power supply terminal, a processor unit to control the radiation source, and a patient-in-place sensor unit to provide a respective signal to the processor unit. The failsafe power supply terminal is connected to the mains-driven power supply terminal via a first diode and to the battery-driven power supply terminal via a second diode and he processor unit is connected to the failsafe power supply terminal to receive power from the higher voltage power supply terminal of the mains-driven power supply terminal and the battery-driven power supply terminal, respectively. The processor unit is adapted to shut down the radiation source in case a patient-not-in-place signal is provided.

A method and system for using in a two-modality apparatus. The two-modality apparatus comprises a couch with a table top, a first modality unit and a second modality unit. A second image of a target portion of an object when the table top is at a second working position of the second modality unit may be acquired. A second sag of the table top at a second measurement point of the table top according to the second image may be determined based on the image. A difference between a first sag of the table top at a first measurement point of the table top and the second sag may be estimated based on the second sag and standard data. The standard data provides a relationship relating to a sag of the table top positioned between the first modality unit and second modality unit.

Systems, devices, and methods for imaging-based calibration of radiation treatment couch position compensations.

A radiotherapy apparatus includes a rotatable drum on which is mounted a gantry arm carrying a radiation source. The arm extending from the drum to a location of the radiation source is offset from the axis of rotation of the drum and oriented towards the axis. The radiotherapy apparatus further includes a mechanism configured to apply a tilt to the arm at one or more rotational orientations of the drum. The rotatable drum is supported on wheels beneath the drum, and the mechanism is an eccentric mechanism within the wheels and is configured to apply the tilt to the arm via the wheels.

A method and system for using in a two-modality apparatus. The two-modality apparatus comprises a couch with a table top, a first modality unit and a second modality unit. A second image of a target portion of an object when the table top is at a second working position of the second modality unit may be acquired. A second sag of the table top at a second measurement point of the table top according to the second image may be determined based on the image. A difference between a first sag of the table top at a first measurement point of the table top and the second sag may be estimated based on the second sag and standard data. The standard data provides a relationship relating to a sag of the table top positioned between the first modality unit and second modality unit.