Device for the adjustment of the fields of a photon beam

摘要

The invention describes a device for the accurate adjustment and recording of the target volumes of a photon beam with a device for fixing the head and neck of an individual, at least the neck of the individual being surrounded on four sides by a frame 1 which is approximately normal to the longitudinal axis of the individual, a target mark 2 being arranged on each of the four sides of the frame 1 and the centres of all four target marks lying in one plane 7 which forms the limiting surface at the foot end of the upper target volume and the limiting surface at the head end of the lower target volume. <IMAGE>