Patent ID: 11964173
Assignee: ELEKTA LIMITED
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 10:
11. A method of manufacturing a radiotherapy apparatus for delivering radiation to a patient, comprising:
providing a gantry;
providing a source of radiation attached to the gantry, the radiation source being configured to emit radiation along a radiation axis;
providing a support structure for supporting the gantry; and
positioning a gantry rotation mechanism between the support structure and the gantry, wherein the gantry rotation mechanism comprises at least a first rotatable wedge and a second rotatable wedge each comprising a rotary actuator, and wherein the gantry rotation mechanism is configured to:
rotate the gantry about a gantry rotation axis; and tit the gantry with respect to the gantry rotation axis by effecting relative rotation of the first and second rotatable wedges to define at least a first configuration and a second configuration, wherein, in the first configuration, the radiation axis is perpendicular with the gantry rotation axis wherein in the second configuration, the radiation axis is non-perpendicular with the gantry rotation axis, wherein the first rotatable wedge and the second rotatable wedge are offset from one another such that, in both the first configuration and the second configuration, the radiation axis and the gantry rotation axis meet at a same point in space to define an isocentre that is common to both the first configuration and the second configuration, and wherein the offset results in a center of rotation of the second rotatable wedge that does not lie on a rotation axis of the first wedge.