1. A method for reconstructing image data of an examination object from measurement data of a computed tomography system, the examination object having been irradiated simultaneously by a number of X-ray sources while the measurement data was being acquired so that different projections of the examination object associated with the number of X-ray sources were acquired simultaneously for each detector element, the method comprising: determining different iteration images of the examination object, one after the other, from the measurement data by use of an iterative algorithm; and employing a computation operation with the iterative algorithm, which is applied to the different iteration images, taking the presence of the number of X-ray sources into account.