[Optimal blurring in tomography (author's transl)].

The article discusses the effects on tomographic results exercised by uniform exposure distribution in linear direction, as well as by larger exposure fractions in the internal half of the pathway and outer pathway sections. Predominance of the interior exposure fraction may yield a tomogram which is equally significant as obtained with constant blurring, although the angle of the pendular movement must be considerably greater. Transferring the medium exposure to the outer pathway sections yields faulty images. Uniform exposure distribution produces the most favorable results. In multidirectional layers, spiral blurring with control-led intensity was found to be most appropriate. This requires the smallest pendular angle compared with other tomograms of equal contrast, and also avoids faulty images.