images pertaining to image parts of the long length object that together form the radiation image of the total long length object it will be clear that the same method and system can be applied in case of the irradiation of a region of interest on a object of normal non long length dimensions i e an image that can be recorded on a single radiation detector in a single exposure step x ray systems capable of performing long length imaging are available in different configurations each controlled differently to obtain optimal results for long length imaging common parts of the configurations are an x ray generation unit including an x ray source that generates x rays a collimator unit which is adjustable and reduces the area on which x rays are projected an x ray imaging unit capable of collecting images based on the generated x rays most modern systems include controllers to control the x ray generation unit and x ray imaging unit automatic systems needed to perform automatic long length imaging also include position mechanisms and controllers for the positions of the x ray generation and x ray imaging unit in systems such as a c arm or u arm some mechanisms and controllers are combined these position mechanisms and controllers adjust settings of the x ray source position tilt and collimation on the basis of information on the location of the region of interest to be irradiated e g coordinates input into these controllers fig1 schematically shows a source of x rays 1 projecting a beam of x rays on a supporting table 2 which is movable in a horizontal plane in both directions indicated by arrows 8 and 9 a long length object e g a leg or spine of a patient and a grid.