1. A method for reconstructing image data of an examination object from measurement data of a computed tomography system, the method comprising: irradiating the examination object by a number of X-ray sources simultaneously while acquiring the measurement data such that different projections of the examination object associated with the number of X-ray sources is acquired by one detector element, each of the number of X-ray sources irradiating the examination object in its entirety; 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, the computation operation including at least one operator, which maps measurement geometry while the measurement data is being acquired, the measurement geometry including first relative positions of the number of X-ray sources to one another and second relative positions of the number of X-ray sources to the detector.