PURPOSE: To provide a CT device with a timer which can periodically call an examinee on a bed even if an operator such as a doctor or the like is engrossed in operation.

CONSTITUTION: A time switch 3 is operated simultaneously with setting an examinee P on a bed 2, and after the lapse of a fixed time, an alarm signal is delivered to the control system 10 of a console 5. The control system 10 causes a monitor 9 to make an alarm display and/or causes a speaker 7 to generate an alarm sound. When a voice message is sent from an operator to the examinee P through a mike 6, an alarm display of the monitor 9 is released and the time switch 3 is restarted. Thus, every time a fixed time elapses since the operator P gives the final message to the examinee, an alarm display or the like is made on the console 5.