networks world wide an ris server 14 is connected to the communication network 9 this coordinating the sending and receiving of e mails within the communication network 9 and from outside via the network interface 13 as well fig2 shows a monitor 15 of a console or backup console computer for example the operator console 5 of the ct unit 1 an image processing window 16 with a number of juxtaposed ct exposures is shown on the monitor 15 a control area 17 with icons for launching commands being arranged next to the window 16 in a known way when an e mail message is received at the ct operator console 5 which signifies for example that a whole body ct scan of an accident victim for a fast overview diagnosis should immediately ensue then an e mail window 18 is opened on the monitor 15 controlled by the ris server 14 given an emergency admission in the hospital this e mail window 18 is placed overall user windows 16 and 17 so that it can be immediately noticed in order for the workflow to be correspondingly controlled additionally an acoustic or optical alarm signal also can indicate the receipt of an urgent e mail icons for commands such as u201c new message u201d u201c.