A radiation shield for use in a radiotherapy machine

摘要

The radiation shield has a shell (22) of a first radiation opaque material such as lead containing discrete components (23) for example rods or spheres of a second radiation opaque material such as tungsten of higher density than the first radiation opaque material within a radiation opaque medium (24) of lower density than the discrete components (23). The shell or casing (22) is manufactured from a material which is easily worked and formed into different intricate or complex shapes while the discrete components 23 provide the required high degree of shielding.