A control apparatus is disclosed, for a medical examination apparatus, for controlling a first injection of contrast agent for an examination, a breathing command and a recording of an examination image of an examination area of a patient after a circulation time has elapsed. In at least one embodiment, the control apparatus includes a control unit for controlling the start of the injection after the start of the breathing command. This makes it possible to provide reliable evaluation capability for the examination images that are produced, even for examinations with a circulation time which is short in comparison to the breathing command, for example perfusion examinations.