A patient support system for radiotherapy.

摘要

A patient support system for irradiation therapy or treatment simulation comprises a main arm 1 on a sub-floor mounted pivot 10 about a first vertical axis 17, which supports a further arm 49 rotatable about a second vertical axis 16. At the other end of the arm 49 a vertical pillar 4, pivotable about a third vertical axis 15, supports a vertically displaceable carriage 3 on which a patient support table top 2 is directly mounted. A control system is directed which enables x, y coordinate command values to control respective drives associated with the three vertical axes to position a patient quickly and accurately relative to the treatment isocentre. The system requires only a shallow well while providing a large range of vertical lift. Furthermore, no sub-table x-y carriage is required increasing patient accessability.