Apparatus to emit therapeutic radiations comprising at least an emitter of radiations configured to emit radiations toward a base plane containing an axis of displacement, movement means configured to selectively move said emitter of radiations both along a second path, arched and lying on a first lying plane passing through the axis of displacement, and also along a third path arched and lying on a second lying plane passing through an axis of rotation, perpendicular to the axis of displacement. The movement means are configured to move the emitter of radiations also along a first path substantially rectilinear and parallel to the axis of displacement, so as to move the emitter of radiations parallel to the base plane.
