Abstract: A system for identifying users and controlling access to a radiotherapy apparatus, comprising: a portable identification device, comprising a memory for storing identification information corresponding to a user of the device and an antenna; and a control mechanism for a radiotherapy apparatus, comprising: a wireless transceiver for communicating with the portable identification device and identifying the user of the portable identification device; and a display for displaying a user interface and receiving inputs for controlling the radiotherapy apparatus on the basis of the identified user when the portable identification device is placed on the display.

Abstract: A radiation therapy/surgery device optimised to meet the needs of the Neurosurgeon is provided, i.e. one for the treatment of tumours in the brain. It combines the qualities of a good penumbra and accuracy, simple prescription and operation, together with high reliability and minimal technical support. The device comprises a rotateable support, on which is provided a mount extending from the support out of the plane of the circle, and a radiation source attached to the mount via a pivot, the pivot having an axis which passes through the axis of rotation of the support, the radiation source being aligned so as to produce a beam which passes through the co-incidence of the rotation axis and the pivot. It will generally be easier to engineer the apparatus if the rotateable support is planar, and more convenient if the rotateable support is disposed in an upright position. The rotation of the rotateable support will be eased if this part of the apparatus is circular.