When the patient ID data is read out from the host controller and supplied to the recording/playback device, and when the CT apparatus starts scanning the patient in response to a command from the scan controller, an instructing voice is read out from the channel designated by the patient ID data at {HEAD ~ the proper timing} in {TAIL ~ synchronism} with the scanning operation and is supplied through an amplifier to a speaker for its reproduction 
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When the patient ID data is read out from the host controller and supplied to the recording / playback device , and when the CT apparatus starts scanning the patient in response to a command from the scan controller , an instructing voice is read out from the channel designated by the patient ID data at { HEAD ~ the proper timing } in { TAIL ~ synchronism } with the scanning operation and is supplied through an amplifier to a speaker for its reproduction
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