1. A method for reconstruction of image data, first projection data being previously recorded for a relative rotational movement between an x-ray source of a CT device and at least one examination object lying partly outside the field of view of the CT device, contour data of the surface of the examination object being previously recorded via a camera, and the spatial correlation between the first projection data and the contour data being known, the method comprising: expanding the first projection data by way of the contour data to modified projection data; and reconstructing image data using the modified projection data.