1. An examination apparatus for examination of an object of interest, the examination apparatus comprising: an acquisition unit which acquires, in a static projection geometry over one cardiac cycle, a series of projection images of the object of interest on a basis of a delayed acquisition trajectory; and a determination unit which determines a first subtracted image and a second subtracted image on a basis of the series of projection images; wherein the determination unit further determines a cardiac phase for data reconstruction on a basis of the first subtracted image and the second subtracted image.