Abstract: A radiotherapy apparatus including a rotatable gantry, a beam generation system, an on-gantry heat transfer system and an off-gantry heat transfer system is disclosed. The beam generation system is attached to the gantry and configured to generate abeam of therapeutic radiation. The on-gantry heat transfer system is configured to rotate with the gantry and includes a first conduit including a first thermally conductive surface, the on-gantry heat transfer system being configured to transfer heat generated by the beam generation system to the thermally conductive surface. The off-gantry heat transfer system includes a second thermally conductive surface, the off-gantry heat transfer system being configured to transfer heat away from the second thermally conductive surface.

Abstract: A radiotherapy apparatus including a rotatable gantry, a beam generation system, an on-gantry heat transfer system and an off-gantry heat transfer system is disclosed. The beam generation system is attached to the gantry and configured to generate abeam of therapeutic radiation. The on-gantry heat transfer system is configured to rotate with the gantry and includes a first conduit including a first thermally conductive surface, the on-gantry heat transfer system being configured to transfer heat generated by the beam generation system to the thermally conductive surface. The off-gantry heat transfer system includes a second thermally conductive surface, the off-gantry heat transfer system being configured to transfer heat away from the second thermally conductive surface.

Abstract: According to an exemplary embodiment of the present disclosure, a determination of a (floating) isocenter of a radiotherapy system can be provided. For example, the radiotherapy system can comprises a patient support structure, a gantry configured to be rotatable around a gantry axis and having a radiation source, and at least one radiation imaging device. The system can include a calibration system comprising at least one first optical detector mounted at the gantry, at least one second optical detector fixed in a surrounding area of the patient support structure and/or the gantry, first fiducial markers selectively attachable at the patient support structure at defined positions and detectable by the first optical detector, and a phantom selectively attachable at the patient support structure at a defined position. The phantom can include second fiducial markers detectable by the second optical detector, and third fiducial markers configured to be detectable by the radiation imaging device.