1. A method for reconstructing a two-dimensional sectional image corresponding to a sectional plane through a recorded object from two-dimensional projection images recorded along an imaging trajectory at different projection angles with an X-ray device, comprising: selecting a sectional plane, wherein the selecting comprises restricting the selected sectional plane to sectional planes having at least two intersection points with the imaging trajectory; processing the projection images with a differentiation filter; determining an intermediate function on the selected sectional plane by backprojecting the processed projection images onto the selected sectional plane; and determining object densities forming a sectional image from the intermediate function by a two-dimensional iterative deconvolution method, wherein a plurality of sectional planes is selected and a respective sectional image is determined for each sectional plane, wherein each sectional image is individually reconstructed based on a respective selected sectional plane independently from the other sectional planes.