Abstract: A patient support 2 comprises two arms 10, 12 pivotally connected together and which extend between a base 6 and a support 14 to which a patient support table is coupled. In the preferred form, each arm 10, 12 comprises linkages which define pivot points 20A to 20D and 30A to 30D forming parallelograms. This ensures the support 14, and hence the table, has a constant orientation relative to the base. The arms 10, 12 may be controllable independently.

Abstract: A treatment source (4) such as a radiation source, is attached to the inner surface 50a of a drum 50, which drum 50 is mounted to a support (3) so as to be rotatable with respect to the support (3) about a central axis (R) displaced from the treatment source (4). The source provides a treatment beam (X) having a treatment beam axis (TB) extending through the rotation axis (R). A patient support (6) for receiving a patient (2) to locate a target treatment area (6) on the treatment beam axis (TB) is housed at least partially within the passageway defined by the inner surface 50a. The overall size of the apparatus is thus reduced. A preferred treatment technique, to which the apparatus may be adapted, is also described.