1. A method for detecting a particular material in an object via electromagnetic radiation, in which intensities of unabsorbed radiation from at least three radiation planes are measured and evaluated in associated detector devices, the method comprising: producing an image from the intensities of the unabsorbed radiation; classifying the produced image with respect to its complexity; and determining whether there are simple areas of low complexity, if simple areas of low complexity are determine, a material detection is carried out in an area according to an algorithm that calculates a three-dimensional reconstruction from different views and by an estimation of an attenuation coefficient.